CA2417183C - Low profile infusion set - Google Patents
Low profile infusion set Download PDFInfo
- Publication number
- CA2417183C CA2417183C CA002417183A CA2417183A CA2417183C CA 2417183 C CA2417183 C CA 2417183C CA 002417183 A CA002417183 A CA 002417183A CA 2417183 A CA2417183 A CA 2417183A CA 2417183 C CA2417183 C CA 2417183C
- Authority
- CA
- Canada
- Prior art keywords
- cannula
- housing
- infusion set
- needle
- set according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0097—Catheters; Hollow probes characterised by the hub
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/02—Holding devices, e.g. on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1587—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body suitable for being connected to an infusion line after insertion into a patient
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/02—Holding devices, e.g. on the body
- A61M2025/024—Holding devices, e.g. on the body having a clip or clamp system
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/02—Holding devices, e.g. on the body
- A61M2025/0253—Holding devices, e.g. on the body where the catheter is attached by straps, bands or the like secured by adhesives
- A61M2025/026—Holding devices, e.g. on the body where the catheter is attached by straps, bands or the like secured by adhesives where the straps are releasably secured, e.g. by hook and loop-type fastening devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/02—Holding devices, e.g. on the body
- A61M2025/028—Holding devices, e.g. on the body having a mainly rigid support structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0606—"Over-the-needle" catheter assemblies, e.g. I.V. catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S128/00—Surgery
- Y10S128/06—Intravenous injection support
Abstract
An infusion set (10) for administration of fluid to a subcutaneous layer includes a cannula housing (12). The needle housing (14) has a pair of flexible sidewalls (94,96) and a resilient band (102) connected to the sidewalls (98,100). The resilient band (102) is lockably engageable with the cannula housing (12) to thereby secure the housings together, and is releasable from the cannula housing (12) when the sidewalls (94,96) are pressed toward each other to deform the resilient band (102). A hollow needle extends out of a main body of the needle housing (14) for delivering fluid to the cannula from a fluid source. The walls of the needle housing (14) extend beyond a distal end of the hollow needle to prevent needle contact with contaminated surfaces and inadvertent injury.
Description
I~~W PR~FII~~ IIyTF'~TSI~1~1 SET
BACKiJROIJND OF T111E INVENTI~N
Field of the Invention This invention relates to medical devices, and more particularly to a low profile infusion set for intermittent or continuous subcutaneous administration of medication or other substances beneficial to health.
Description of the Related Art Frequent or continuous subcutaneous injection of medication is often accomplished through the use of an infusion set or injection port which may remain in place for several days. In the case of frequent inj ections, this reduces the need to constantly puncture the skin and thereby reduce the chance of infectiowand the formation of scar tissue. For continuous subcutaneous delivery of medication such as commonly used with portable insulin pumps, an infusion set is often used to provide a method of temporarily detaching the pump and fluid line for activities such as dressing or bathing. It is also desirable in this instance to detach the fluid line from the pump as close to the injection site as possible leaving a relatively small component attached to body to minimize the interference during dressing, bathing or other activities.
While devices for this purpose have been proposed, these devices have limitations making them less than ideal in practice. By way of example, U.S. Patent No. 4,755,173 issued to Konoplca et al. on July 5, 1988, discloses a soft cannula subcutaneous injection set that relies on a length of tubing with a separate fluid connector for detachment from the source of medication. No provision is provided for disconnecting the fluid tubing from the injection site. The tubing must either be secured to the body with additional adhesive tape or left to awlcwardly hang from the injection site where it has a tendency to snag on clothing.
U.S. Patent No. 5,545,143 issued to Fischell on August 3, 1996, describes a device for the subcutaneous delivery of medication. This device includes a short tubular extension with a connector to the main body of the device which eliminates the tubing but makes the overall package long and somewhat bulky.
U.S. Patent No. 5,522,803 issued to Teissen-Simony on June 4, 1996, discloses an infusion set that overcomes some of the problems with the other devices but presents it's own disadvantages. Namely, the infusion needle is not covered for protection against accidental needle sticks or contamination. Also, the cannula housing and needle hub are difficult to align and connect without being directly viewed by the user. This is especially a problem for diabetics with impaired vision. In addition, the guide pins and locking pins of this patent form multiple sharp projecting points which are susceptible to bending or breakage or accidentally poking the user, especially when connecting to injection sites not in the user's direct line of sight.
U.S. Patent No. 6,056,715 issued to Funderburk et al. on May 2, 2000, discloses an infusion set that is similar to U.S. Patent No. 5,522,803 and has some of the same problems and disadvantages, particularly in respect to alignment and use of the latch arms and locking fingers which must bend and are susceptible to breaking.
1 S S1JMMARY OF TAE ~N~NTION
According to one embodiment of the invention, an infusion set comprises a cannula housing adapted for mounting onto a person°s skin and a needle housing for connection to the cannula housing. The cannula housing has a locking element positioned thereon. A
cannula is connected to the cannula housing and extends therefrom. The needle housing has at least a first flexible sidewall and a resilient band connected to the sidewall for .deformation upon deflection of the sidewall. The resilient band is lockably engageable with the locking element to thereby secure the housings together, and is releasable from the locking element upon deflection of the sidewall to thereby deform the resilient band out of locking engagement with the locl~ing element.
A hollow needle extends through the needle housing for delivering fluid to the cannula from a fluid source.
According to a further embodiment of the invention, an infusion set comprises a cannula housing adapted for mounting onto a patient's skin and a needle housing adapted for connection to the cannula housing. A cannula is connected to the cannula housing and extends therefrom. A
hollow needle for delivering fluid to the cannula from a fluid source extends from a main body of the needle housing such that a distal end of the hollow needle is spaced from the main body. The needle housing further has first and second sidewalls and .an upper wall that extends from the main body beyond the distal end of the hollow needle to thereby prevent inadvertent contact of the hollow needle with contaminated surfaces when the needle housing is separated from the cannula housing.
~ther objects and advantages of the invention will become apparent upon review of the following detailed description and appended claims, with reference to the accompanying drawings.
BRIEF ~ESC~PTION OF TI4E ~D~WdNGS
The preferred embodiments of the present invention will hereinafter be described in conjunction with the appended drawings, wherein like designations denote like elements, and wherein:
FIG. 1 is a top plan view of the assembled infusion set according to the invention, with a flexible plastic tubing and luer coupling connected at opposite ends of the infusion set;
FIG. 2 is a side elevational view of the assembled infusion set in FIG. 1 showing the inserted cannula in a cross section of the skin;
FIG. 3 is a top plan view of the assembled infusion set absent a mounting pad;
FIG. 4 is rear elevational view of the assembled infusion set of FIG. 3, absent the luer coupling;
FIG. 5 is a cross sectional view of the assembled infusion set taken along line 5-5 of FIG. 3;
FIG. 6 is a top plan view of a cannula housing that forms part of the infusion set of FIG. 1;
FIG. 7 is a cross sectional view of the cannula housing taken along line 7-7 of FIG. 6;
BACKiJROIJND OF T111E INVENTI~N
Field of the Invention This invention relates to medical devices, and more particularly to a low profile infusion set for intermittent or continuous subcutaneous administration of medication or other substances beneficial to health.
Description of the Related Art Frequent or continuous subcutaneous injection of medication is often accomplished through the use of an infusion set or injection port which may remain in place for several days. In the case of frequent inj ections, this reduces the need to constantly puncture the skin and thereby reduce the chance of infectiowand the formation of scar tissue. For continuous subcutaneous delivery of medication such as commonly used with portable insulin pumps, an infusion set is often used to provide a method of temporarily detaching the pump and fluid line for activities such as dressing or bathing. It is also desirable in this instance to detach the fluid line from the pump as close to the injection site as possible leaving a relatively small component attached to body to minimize the interference during dressing, bathing or other activities.
While devices for this purpose have been proposed, these devices have limitations making them less than ideal in practice. By way of example, U.S. Patent No. 4,755,173 issued to Konoplca et al. on July 5, 1988, discloses a soft cannula subcutaneous injection set that relies on a length of tubing with a separate fluid connector for detachment from the source of medication. No provision is provided for disconnecting the fluid tubing from the injection site. The tubing must either be secured to the body with additional adhesive tape or left to awlcwardly hang from the injection site where it has a tendency to snag on clothing.
U.S. Patent No. 5,545,143 issued to Fischell on August 3, 1996, describes a device for the subcutaneous delivery of medication. This device includes a short tubular extension with a connector to the main body of the device which eliminates the tubing but makes the overall package long and somewhat bulky.
U.S. Patent No. 5,522,803 issued to Teissen-Simony on June 4, 1996, discloses an infusion set that overcomes some of the problems with the other devices but presents it's own disadvantages. Namely, the infusion needle is not covered for protection against accidental needle sticks or contamination. Also, the cannula housing and needle hub are difficult to align and connect without being directly viewed by the user. This is especially a problem for diabetics with impaired vision. In addition, the guide pins and locking pins of this patent form multiple sharp projecting points which are susceptible to bending or breakage or accidentally poking the user, especially when connecting to injection sites not in the user's direct line of sight.
U.S. Patent No. 6,056,715 issued to Funderburk et al. on May 2, 2000, discloses an infusion set that is similar to U.S. Patent No. 5,522,803 and has some of the same problems and disadvantages, particularly in respect to alignment and use of the latch arms and locking fingers which must bend and are susceptible to breaking.
1 S S1JMMARY OF TAE ~N~NTION
According to one embodiment of the invention, an infusion set comprises a cannula housing adapted for mounting onto a person°s skin and a needle housing for connection to the cannula housing. The cannula housing has a locking element positioned thereon. A
cannula is connected to the cannula housing and extends therefrom. The needle housing has at least a first flexible sidewall and a resilient band connected to the sidewall for .deformation upon deflection of the sidewall. The resilient band is lockably engageable with the locking element to thereby secure the housings together, and is releasable from the locking element upon deflection of the sidewall to thereby deform the resilient band out of locking engagement with the locl~ing element.
A hollow needle extends through the needle housing for delivering fluid to the cannula from a fluid source.
According to a further embodiment of the invention, an infusion set comprises a cannula housing adapted for mounting onto a patient's skin and a needle housing adapted for connection to the cannula housing. A cannula is connected to the cannula housing and extends therefrom. A
hollow needle for delivering fluid to the cannula from a fluid source extends from a main body of the needle housing such that a distal end of the hollow needle is spaced from the main body. The needle housing further has first and second sidewalls and .an upper wall that extends from the main body beyond the distal end of the hollow needle to thereby prevent inadvertent contact of the hollow needle with contaminated surfaces when the needle housing is separated from the cannula housing.
~ther objects and advantages of the invention will become apparent upon review of the following detailed description and appended claims, with reference to the accompanying drawings.
BRIEF ~ESC~PTION OF TI4E ~D~WdNGS
The preferred embodiments of the present invention will hereinafter be described in conjunction with the appended drawings, wherein like designations denote like elements, and wherein:
FIG. 1 is a top plan view of the assembled infusion set according to the invention, with a flexible plastic tubing and luer coupling connected at opposite ends of the infusion set;
FIG. 2 is a side elevational view of the assembled infusion set in FIG. 1 showing the inserted cannula in a cross section of the skin;
FIG. 3 is a top plan view of the assembled infusion set absent a mounting pad;
FIG. 4 is rear elevational view of the assembled infusion set of FIG. 3, absent the luer coupling;
FIG. 5 is a cross sectional view of the assembled infusion set taken along line 5-5 of FIG. 3;
FIG. 6 is a top plan view of a cannula housing that forms part of the infusion set of FIG. 1;
FIG. 7 is a cross sectional view of the cannula housing taken along line 7-7 of FIG. 6;
FIG. 8 is a side elevational view of the cannula housing;
FIG. 9 is a cross sectional view of the cannula housing taken along line 9-9 of FIG. 8;
FIG. 10 is a rear elevational view of the cannula housing shown~in FIG. 8 in the direction of arrow A;
FIG. 11 is a top plan view of a needle housing that forms part of the infusion set of FIG. 1;
FIG. 12 is a cross sectional view of the needle housing taken along line 12-12 of FIG. 11;
FIG. 13 is a side elevational view of the needle housing;
FIG. 14 is a front elevational view of the needle housing;
FIG. 15 is a bottom plan view of the needle housing;
FIG. 16 is a cross sectional view of the needle housing taken along line 16-16 of FIG. 13;
FIG. 17 is a top plan view of an insertion needle housing connected to the cannula housing;
FIG. 18 is a side elevational view of the insertion needle housing connected to the cannula housing;
FIGS. 19A and 19B are side elevational views of a cannula and ferrule associated with the cannula housing and their method of assembly according to a fiu~ther embodiment of the invention;
FIG. 20 is a cross sectional view similar to FIG. 5 and illustrating a further embodiment of the invention for retaining the cannula and a septum associated with the cannula in the infusion set;
FIG. 21 is a top plan view of an insertion needle housing according to a further embodiment of the invention connected to the cannula housing;
,;... .
FIG. 22 is a side elevational view of the insertion needle housing and cannula housing of FIG. 21;
FIGS. 23A and 23B and are side elevational views of a ferrule according to a further embodiment of the invention and the manner in which the cannula is joined to the ferrule; and FIG. 24 is a cross sectional view similar to FIG. 20 and illustrating the cannula and ferrule of FIG's 23A and 23B mounted in the infusion set;
FIG. 25 is a top plan view of the assembled infusion set similar to FIG. 1 and illustrating a further embodiment of the invention;
FIG. 26 is a top plan view of a needle housing that forms a part of the infusion set of FIG.
25;
FIG. 27 is a side elevational view of the needle housing;
FIG. 28 is a front elevational view of the needle housing;
FIG. 29 is a perspective view of an assembled infusion set;
FIG. 30 is a perspective view of the cannula housing with the needle housing removed; and FIG. 31 is a prospective view of a needle housing of a different embodiment of the invention removed from the cannula housing.
It is noted that the drawings are intended to depict only typical embodiments of the invention, and therefore should not be considered as limiting the scope thereof. The invention will now be described with additional detail with particular reference to the drawings.
DETAILED DESCRIPTION OF THE PP2EFE~D FriVIB~DILVIENTS
Referring now to the drawings, and to FIGS. 1 and 2 in particular, an infusion set 10 according to the invention includes a cannula housing 12 releasably connected to a needle housing 14. The needle housing 14 may be released from the cannula housing 12, as will be described in greater detail below, for activities such as bathing, dressing, or the like. A
flexible cannula 16 is connected to the cannula housing 12. The cannula 16 is adapted to extend through the epidermis layer 22 and dermis layer 24 at an acute angle with respect to the epidermis layer, with an outer free end 17 of the cannula located in the subcutaneous fat layer 26 between the dermis Layer 24 and muscle layer 28 for delivering medication or the.lilce to the subcutaneous layer 26. A length of flexible tubing 18 with a fluid connector or Luer fitting 20 is connected to the needle housing 14.
The fluid connector 20 is adapted for connection to a source of medication, such as insulin, or other fluids associated with health care for delivery of the fluids to the subcutaneous layer 26 through the housings 12, 14 and the cannula 16.
The particular configuration of the connected housings 12, 14 lends well to reducing the overall size of the infusion set 10 over prior art devices. By way of example, the dimensions may be approximately 16.5 mm wide by 20 mm long by 7 mm high. Cooperating connection members located in the housings (described in greater detail below) afford relatively easy connection and disconnection of the housings, despite the small overall size. It is to be understood that the overall size of the assembled housings may be larger or smaller than the stated dimensions.
A mounting pad 30 is connected to a bottom surface 32 (FIG. 3) of the cannula housing 12.
The mounting pad 30 preferably includes an adhesive layer (not shown) for attaching the infusion set 10 to the epidermis layer 22 of a person. The cannula 16 extends through an opening 34 in the mounting pad 30 when the outer free end 17 of the cannula is located in the subcutaneous layer 26.
With reference now to FIGS. 6 through 10, the cannula housing 12 includes a main body portion 38 with series of collinear stepped bores 40, 42 and 44 of increasing diameter formed therein. The bore 40 is the smallest in diameter and extends from a forward end 46 of the cannula housing 12 to the bore 42. The bore 42 in turn extends between the bores 40 and 44. The bore 44 opens at a rearward end 48 of the cannula housing 12. The bores may extend at an angle of about 0° (parallel to the bottom 32 surface) to about 30° with respect to the bottom surface 32, and preferably extend at an angle of approximately 7°. The choice of angle is determined by these considerations. Smaller angles allow the overall height of the assembled infusion set to be minimized for a given bore size, but angling the bore with respect to the bottom 32 minimizes the bending of the cannula and allows the cannula to exit the cannula housing closer to the bottom surface, thereby minimizing the exposure of the cannula above the skin. The preferred angle of 7°
provides a reasonable compromise of the desirable properties. Alignment grooves 45, 47 are formed on each side of the cannula housing 12. The alignment grooves 45, 47 preferably extend at the same angle as the bore 40 with respect to the bottom surface 32, for aligning the needle housing 14 with the cannula housing 12 during assembly. A small protrusion 49 and groove 51 are formed on the top surface of the main body to lock the housings 12, 14 together, as will be described in greater detail below. The cannula housing 12 may be injection molded from a plastic, such as polypropylene, polycarbonate, or polyurethane.
As shown in FIG. 5, a stepped ferrule 50 is located in the bores 42 and 44.
The cannula 16 is fixedly mounted to the ferrule 50 and extends through the bore 40 and outwardly from the forward end 46 a predetermined distance. Preferably, the cannula extends approximately 15 mm beyond the forward end 46 of the cannula housing 12. This length may vary greatly depending on the type of application, the thickness of body layers, and the location of the infusion set when mounted.
A self sealing elastomeric septum 52 is sandwiched between the ferrule 50 and a septum retainer 54 in the bore 44. The septum 52 has a self closing aperture 56 that is preferably collinear with a central axis of the bores 40, 42 and 44 to seal the mounted end of the cannula 16 against the ingress of contaminants and the egress of fluids. The septum retainer 54 also includes an aperture 58 in alignment with the aperture 56. A hollow needle 60 extends through the apertures 58 and 56 during use for delivering medication or other substances to the cannula 16 from the fluid source.
The septum retainer 54 includes a protrusion 62 that engages a resilient loclcing tab 66 within an opening 64 at the bottom of the cannula housing 12 to hold the retainer 54, and thus the ferrule 50 and septum 52, within the housing 12. Alternatively, the septum retainer can be bonded, ultrasonically welded, or retained by a snap fit or heat staking in the housing 12.
The ferrule 50 can be molded from a plastic material such as polypropylene or polycarbonate, or formed from a bio-compatible metal such as 304 stainless steel. The elastomer _7_ septum can be constructed of a medical grade silicone rubber. The cannula retainer can also be molded from a plastic material such as polypropylene or polycarbonate.
During assembly, the cannula 16, ferrule 50, septum 52, and septum retainer 54 are inserted into the bore 44 of the cannula housing 12 with the distal end 17 of the cannula extending out of the forward end 46 of the housing. An inner connection end of the cannula is preferably connected to the ferrule, but may alternatively be directly connected to cannula housing 12. .
With particular reference now to FIGS. 11 through 16, the needle housing 14 includes a main body portion 70 with a pair of collinear stepped bores 72, 74 of increasing diameter formed therein. The bore 72 is the smallest in diameter and extends from a forward end 76 of the main body 70 to the bore 74. The bore 74 in turn extends between the bore 72 and the rearward end 78 of the needle housing 14. The bores 72, 74 may extend at an angle of about 0° (parallel to the bottom surface 32) to about 30° with respect to the bottom surface 32 of the cannula housing 12 when assembled, and preferably extend at an angle of approximately 7°..
The needle 58 extends through the bore 72 with an outer end of the needle extending forwardly of the bore 72. Lilcewise, the tubing 18 is positioned in the bore 74 and extends outwardly from the rearward end 78 of the needle housing 14. An upper wall 88 is formed with the main body portion 70 and extends forwardly therefrom. Guide rails 80 and 82 protrude generally downwardly from opposite sides 84 and 86, respectively, of the upper wall 88. Each guide rail includes a relatively straight portion 90 that terminates in a semi-cylindrical portion 92. The semi-cylindrical eportions 92 are adapted to slidably engage the alignment grooves 45, 47 of the cannula housing 12 during assembly for aligning the needle housing 14 with the cannula housing 12. The needle housing is preferably molded of a flexible, resilient plastic material such as polypropylene, polycarbonate, or polyurethane.
In an alternative embodiment, the cross sectional shape of the guide rails and alignment grooves can be square, rectangular, triangular, rounded, or any other suitable shape. Clearance between the guide rails and alignment grooves is preferably on the order of about 0.05 mm to _g_ accurately locate the needle 58 with the septum 52 but still enable the needle housing 14 to slide freely on the cannula housing 12.
Resilient sidewalk 94 and 96 are formed at opposite sides 98 and 100, respectively, of the main body portion 70. The resilient sidewalls 94 and 96 extend forwardly of the forward end 76 and generally parallel to the sides 84 and 86, respectively, of the upper wall 88. The forward ends of the sidewalls 94, 96 are joined together by a resilient, arcuate locking band 102. The band 102 is curved generally upwardly and is adapted to seat within the groove 51 when the housings 12 and 14 are assembled to thereby lock the housings together. A slot 104 is located between the upper wall 88, the resilient sidewalk 94, 96 and the resilient band 102. The sidewalk 94 and 96 flex . inwardly toward each other but are preferably relatively stiff in bending in all other planes. In order to reduce the overall length of the assembled housings, a notch 106 is formed in the upper wall 88 to provide clearance for the protrusion 49.
The upper wall 88 has a sufficient length and the sidewalk 94, 96 and guide rails 80, 82 have a sufficient height to extend beyond the end of the needle 58. In this manner, the needle 58 is well shielded to prevent contact with contaminated surfaces and accidental needle punctures when the needle housing 14 is disconnected from the cannula housing 12.
With reference now to FIGS. 1, 3 and 5, during connection of the needle housing 14 with the cannula housing 12, the guide rails 80, 82 of the needle housing engage the alignment grooves 45, 47, respectively, of the caimula housing to pre-align the needle 58 with the aperture 56 of the septum 52 before the septum is penetrated by the needle. As the needle housing slides onto the cannula housing, the resilient band 102 of the needle housing deflects upwardly over the protrusion 49 of the cannula housing, causing deflection of the sidewalk 94, 96 toward each other. Once the band 102 passes over the protrusion 49, it snaps back to its undeflected position in the groove 51 to thereby lock the housings together. This also results in an audible click or snapping sound which reassures the user that a secure connection has been made.
In order to disconnect the needle housing 14 from the cannula housing 12, the sidewalls 94, 96 are squeezed toward each other with finger pressure to thereby deflect the resilient band 102 above the protrusion 49 on the cannula housing. This allows the needle housing to slide freely off the cannula housing.
The protrusion 49 on the cannula housing 12 preferably has a smooth, rounded rear side 108 (FIG. 6) that blends with the top surface of the cannula housing and a relatively flat forward side 110 nearest the cannula 16. When viewed from above, the base of the protrusion is semi-circular with the forward side adjacent the resilient band 102 to thereby hold the band in the groove 51.
The rounded shape of rear side 108 allows the band 102 to be pushed and flexed over the protrusion 49 without squeezing the sidewalk 94, 96 together. Depending on the amount of sidewall movement desired, the height of the protrusion 49 above the top surface of the cannula housing can be varied in order to vary the amount of band deflection. The height of the protrusion 49 may be approximately equal to the band thickness. In one exemplary embodiment, the band thiclcness and the protrusion height is about 0.75 mm to thereby securely lock the housings and permit easy release of the housings when desired.
While it is possible to use a single flexible sidewall connected through the resilient band to a fixed sidewall or other member, the dual flexible sidewalk 94, 96 provide a degree of safety against accidental release. Since both sidewalk 94, 96 must be simultaneously squeezed toward each other, the needle housing 14 will not be released if one sidewall is inadvertently pressed, since both sidewalls would deflect in the same direction and fail to deflect the resilient band 102.
As shown in FIG. 11, disconnection of the needle housing 14 from the cannula housing 12 can be facilitated by arranging the forward ends of the flexible side members 94, 96 to be narrower in width (in the plane of the shin) than the than the rearward end 108 of the needle housing. This could be achieved in a number of ways such as malting the overall shape of the housing tapered towards the resilient band 102 so that the user would grip the narrower end and pull towards the wider end of the needle housing. According to a preferred embodiment, curved forger recesses 110 ~ are formed on the flexible members at the forward end of the needle housing adjacent the resilient band 102 to thereby provide a natural location for forger and thumb placement when disconnecting the needle housing. The grip may also be enhanced by providing small serrations 112 in the curved recesses.
Referring again to FIG. 5, while the cannula 16 can be molded as an integral part of the cannula housilzg, fabricating the cannula separate from the cannula housing is preferred since the material used for each component can be optimized. The cannula 16 is preferably a thin walled, bio-compatible tube constructed of Teflon, such as polytetrafluorethylene, or other suitable material. Where Teflon tubing is used, it may be necessary to pretreat the attachment end of the cannula prior to adhesively bonding the cannula to the cannula housing 12.
Alternatively, the cannula can be bonded to the ferrule 50. Although the size of the cannula can vary, an outside diameter of approximately 0.6 mm is preferred.
With particular reference to FIGS. 19A, 19B and 20, a further embodiment for connecting the cannula 16 to the cannula housing 12 is shown, wherein like parts in the previous embodiment are represented by like numerals. In this embodiment, a ferrule 120 includes a barb 122 for receiving a heat-shrink tubing 126, which is preferably constructed of Teflon.
A removable metal mandrel 124 that is substantially equivalent in diameter to an insertion needle 130 (FIG. 17) is inserted through the ferrule 120 and heat-shrinlc tubing 126. Heat is then applied to the tubing 126, causing it to shrinlc and deform around the barb 122 of the ferrule and the mandrel 124. Due to the relatively low coefficient of friction associated with the Teflon material, the mandrel 124 is easily removed in a direction denoted by arrow 128 in FIG. 19B. In this manner, the heat-shrink tubing 126 forms the cannula 16, which is tightly held on the ferrule 120. The ferrule and attached cannula 16 can then be installed in the cannula housing 12 together with the septum 52 and septum retainer 54. As shown in FIG. 20, the retainer 54 is cylindrical along a substantial portion of its length, and includes a frustro-conical end portion 132 that faces rearwardly with respect to the cannula housing 12. The rearward end 48 of the cannula housing 12 is then deformed over the frustro-conical end portion 132, such as by heat staking, in order to permanently mount the cannula, ferrule, septum, and septum retainer in the cannula housing.
Referring now to FIGS. 23A, 23B and 24, a further embodiment for connecting the cannula 16 to the cannula housing 12 is shown, wherein like parts in the previous embodiments are represented by like numerals. In this embodiment, a ferrule 140 is provided with a hollow shaft portion 142 and a hollow conical portion 144 connected to one end of the shaft portion. The inner diameter of the shaft portion is preferably slightly greater than the outer diameter of the insertion needle 130 (FIG. 17) so that the insertion needle is free to slide within the ferrule 140. In order to install the cannula 16 on the ferrule 140, an attachment end 146 of the cannula 16 is heated to soften the attachment end. The shaft portion 142 is then inserted into the attachment end 146, thereby expanding the diameter of the attachment end and creating a tight seal between the cannula 16 and the ferrule 140. As shown in FIG. 24, the septum 52 acts as a biasing member to press the expanded attachment end 146 against the opening of the bore 40 to thereby form a compression seal.
With reference now to FIGS. 17 and 18, an insertion needle housing 150 for use with the cannula housing 12 is illustrated. The insertion needle housing 15 generally resembles the needle housing 14, with the exception that a handle 152 is formed at the rearward end 78 of the housing, and an insertion needle 130 is provided. The needles used in both the needle housing and insertion needle assembly are preferably 27 gauge 304 stainless steel tubing beveled at one end to create a sharp angled edge. As shown, the handle is generally hour-glass in shape with a gripping surface 154 located between the rearward end 78 and an enlarged head 156. The hourglass shape of the handle 152 improves the grip during installation of the cannula 16 in the skin and mounting of the cannula housing 12 on the skin.
When the insertion needle assembly is connected to the cannula housing assembly with the same guide rail, sidewall and band configuration as the needle housing 12, the end of the insertion needle 130 extends beyond the outer free end of the cannula 16, wluch may be about 2 or 3 rnm.
The handle 152 on the insertion needle housing 150 allows the combined assembly of the insertion needle housing 150 and cannula housing 12 to be grasped with one hand while pinching a fold of slcin with the other hand. The combined assembly can then be pressed into the pinched skin until the needle 130 punctures the skin along with the cannula. The mounting pad 30 can then be attached to the surface of the skin. This may be accomplished by removing a protective backing layer (not shown) to expose an adhesive layer on a lower surface of the mounting pad. ~nce the cannula housing 12 and cannula 16 are properly mounted, the insertion needle housing 1 SO is removed by pinching the resilient sidewalls 94, 96 to release the band 102 from the groove 51 in the cannula housing 12. The needle housing 14 can then be attached to the cannula housing 12 to begin delivery of the medication or other fluid.
With reference now to FIGS. 21 and 22, an insertion needle housing 160 according to a fiuther embodiment of the invention for use with the cannula housing 12 is illustrated, wherein like parts in the previous embodiments are represented by like numerals. The insertion needle housing 160 is substantially similar to the insertion needle housing 150, with the exception that a handle 162 has a different configuration than the handle 152. As shown, the handle 162 is generally rectangular and includes first, second and third gripping surfaces 164, 166, and 168, respectively.
The gripping surfaces are preferably curved generally inwardly to thereby prevent or reduce inadvertent slipping during mounting of the cannula housing 12 and cannula 16.
With reference now to FIGS. 25, 26, 27 and 28, an infusion set 180 according to a fiuther embodiment of the invention is illustrated, wherein like parts in the previous embodiments are represented by like numerals. The insertion needle housing 182 is substantially similar to the insertion needle housing 14, with the exception that the housing has only one resilient sidewall 183 formed at one side 184 of the main body portion 70. Except for the use of only one resilient sidewall, the needle housing 182 is structurally the same as the needle housing 14, or may, if desired, the needle housing 14 may have the structure of the other alternative embodiments described herein. The forward end of resilient sidewall 183 is joined to curved band 102 which is adapted to seat within a groove in the cannula housing 12. The needle housing 182 is joined to the cannula housing 12. During connection of the needle housing 180 with the cannula housing 12, the guide rails 80, 82. of the needle housing engage the alignment grooves 45, 47, respectively, of the cannula housing to pre-align a needle (not shown) with the aperture of the septum before the septum is penetrated by the needle. As the needle housing slides into the cannula housing, the resilient band 102 of the needle housing deflects upwardly over the protrusion 49 of the cannula housing, causing deflection of the single sidewall 183 laterally inward. ~nce the band 102 passes over the protrusion 49, it snaps back to its undeflected position in the groove to thereby lock the housings together. This also results in an audible click or snapping sound which reassures the user that a secure connection has been made.
To disconnect the needle housing 180 from the cannula housing 12, the one sidewall 183 is squeezed laterally inward with forger pressure to thereby deflect the resilient band 102 above the protrusion on the cannula housing. This allows the needle housing to slide freely off the cannula housing.
Finally, for ease of further understanding the invention, FIG. 29 is a perspective view of the assembled infusion set illustrated in FIGS. 1 through 16. FIG. 30 is a perspective of the cannula housing with the needle housing removed to better show how the parts fit together.
FIG. 31 is a perspective view of the needle housing shown in FIGS. 20 and 21, again, to better show the operability of the device.
While the invention has been taught with specific reference to the above-described embodiments, those spilled in the art will recognize that changes can be made in form and detail without departing from the spirit and the scope of the invention. Thus, the described embodiments are to be considered in all respects only as illustrative and not restrictive.
The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description.
All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
FIG. 9 is a cross sectional view of the cannula housing taken along line 9-9 of FIG. 8;
FIG. 10 is a rear elevational view of the cannula housing shown~in FIG. 8 in the direction of arrow A;
FIG. 11 is a top plan view of a needle housing that forms part of the infusion set of FIG. 1;
FIG. 12 is a cross sectional view of the needle housing taken along line 12-12 of FIG. 11;
FIG. 13 is a side elevational view of the needle housing;
FIG. 14 is a front elevational view of the needle housing;
FIG. 15 is a bottom plan view of the needle housing;
FIG. 16 is a cross sectional view of the needle housing taken along line 16-16 of FIG. 13;
FIG. 17 is a top plan view of an insertion needle housing connected to the cannula housing;
FIG. 18 is a side elevational view of the insertion needle housing connected to the cannula housing;
FIGS. 19A and 19B are side elevational views of a cannula and ferrule associated with the cannula housing and their method of assembly according to a fiu~ther embodiment of the invention;
FIG. 20 is a cross sectional view similar to FIG. 5 and illustrating a further embodiment of the invention for retaining the cannula and a septum associated with the cannula in the infusion set;
FIG. 21 is a top plan view of an insertion needle housing according to a further embodiment of the invention connected to the cannula housing;
,;... .
FIG. 22 is a side elevational view of the insertion needle housing and cannula housing of FIG. 21;
FIGS. 23A and 23B and are side elevational views of a ferrule according to a further embodiment of the invention and the manner in which the cannula is joined to the ferrule; and FIG. 24 is a cross sectional view similar to FIG. 20 and illustrating the cannula and ferrule of FIG's 23A and 23B mounted in the infusion set;
FIG. 25 is a top plan view of the assembled infusion set similar to FIG. 1 and illustrating a further embodiment of the invention;
FIG. 26 is a top plan view of a needle housing that forms a part of the infusion set of FIG.
25;
FIG. 27 is a side elevational view of the needle housing;
FIG. 28 is a front elevational view of the needle housing;
FIG. 29 is a perspective view of an assembled infusion set;
FIG. 30 is a perspective view of the cannula housing with the needle housing removed; and FIG. 31 is a prospective view of a needle housing of a different embodiment of the invention removed from the cannula housing.
It is noted that the drawings are intended to depict only typical embodiments of the invention, and therefore should not be considered as limiting the scope thereof. The invention will now be described with additional detail with particular reference to the drawings.
DETAILED DESCRIPTION OF THE PP2EFE~D FriVIB~DILVIENTS
Referring now to the drawings, and to FIGS. 1 and 2 in particular, an infusion set 10 according to the invention includes a cannula housing 12 releasably connected to a needle housing 14. The needle housing 14 may be released from the cannula housing 12, as will be described in greater detail below, for activities such as bathing, dressing, or the like. A
flexible cannula 16 is connected to the cannula housing 12. The cannula 16 is adapted to extend through the epidermis layer 22 and dermis layer 24 at an acute angle with respect to the epidermis layer, with an outer free end 17 of the cannula located in the subcutaneous fat layer 26 between the dermis Layer 24 and muscle layer 28 for delivering medication or the.lilce to the subcutaneous layer 26. A length of flexible tubing 18 with a fluid connector or Luer fitting 20 is connected to the needle housing 14.
The fluid connector 20 is adapted for connection to a source of medication, such as insulin, or other fluids associated with health care for delivery of the fluids to the subcutaneous layer 26 through the housings 12, 14 and the cannula 16.
The particular configuration of the connected housings 12, 14 lends well to reducing the overall size of the infusion set 10 over prior art devices. By way of example, the dimensions may be approximately 16.5 mm wide by 20 mm long by 7 mm high. Cooperating connection members located in the housings (described in greater detail below) afford relatively easy connection and disconnection of the housings, despite the small overall size. It is to be understood that the overall size of the assembled housings may be larger or smaller than the stated dimensions.
A mounting pad 30 is connected to a bottom surface 32 (FIG. 3) of the cannula housing 12.
The mounting pad 30 preferably includes an adhesive layer (not shown) for attaching the infusion set 10 to the epidermis layer 22 of a person. The cannula 16 extends through an opening 34 in the mounting pad 30 when the outer free end 17 of the cannula is located in the subcutaneous layer 26.
With reference now to FIGS. 6 through 10, the cannula housing 12 includes a main body portion 38 with series of collinear stepped bores 40, 42 and 44 of increasing diameter formed therein. The bore 40 is the smallest in diameter and extends from a forward end 46 of the cannula housing 12 to the bore 42. The bore 42 in turn extends between the bores 40 and 44. The bore 44 opens at a rearward end 48 of the cannula housing 12. The bores may extend at an angle of about 0° (parallel to the bottom 32 surface) to about 30° with respect to the bottom surface 32, and preferably extend at an angle of approximately 7°. The choice of angle is determined by these considerations. Smaller angles allow the overall height of the assembled infusion set to be minimized for a given bore size, but angling the bore with respect to the bottom 32 minimizes the bending of the cannula and allows the cannula to exit the cannula housing closer to the bottom surface, thereby minimizing the exposure of the cannula above the skin. The preferred angle of 7°
provides a reasonable compromise of the desirable properties. Alignment grooves 45, 47 are formed on each side of the cannula housing 12. The alignment grooves 45, 47 preferably extend at the same angle as the bore 40 with respect to the bottom surface 32, for aligning the needle housing 14 with the cannula housing 12 during assembly. A small protrusion 49 and groove 51 are formed on the top surface of the main body to lock the housings 12, 14 together, as will be described in greater detail below. The cannula housing 12 may be injection molded from a plastic, such as polypropylene, polycarbonate, or polyurethane.
As shown in FIG. 5, a stepped ferrule 50 is located in the bores 42 and 44.
The cannula 16 is fixedly mounted to the ferrule 50 and extends through the bore 40 and outwardly from the forward end 46 a predetermined distance. Preferably, the cannula extends approximately 15 mm beyond the forward end 46 of the cannula housing 12. This length may vary greatly depending on the type of application, the thickness of body layers, and the location of the infusion set when mounted.
A self sealing elastomeric septum 52 is sandwiched between the ferrule 50 and a septum retainer 54 in the bore 44. The septum 52 has a self closing aperture 56 that is preferably collinear with a central axis of the bores 40, 42 and 44 to seal the mounted end of the cannula 16 against the ingress of contaminants and the egress of fluids. The septum retainer 54 also includes an aperture 58 in alignment with the aperture 56. A hollow needle 60 extends through the apertures 58 and 56 during use for delivering medication or other substances to the cannula 16 from the fluid source.
The septum retainer 54 includes a protrusion 62 that engages a resilient loclcing tab 66 within an opening 64 at the bottom of the cannula housing 12 to hold the retainer 54, and thus the ferrule 50 and septum 52, within the housing 12. Alternatively, the septum retainer can be bonded, ultrasonically welded, or retained by a snap fit or heat staking in the housing 12.
The ferrule 50 can be molded from a plastic material such as polypropylene or polycarbonate, or formed from a bio-compatible metal such as 304 stainless steel. The elastomer _7_ septum can be constructed of a medical grade silicone rubber. The cannula retainer can also be molded from a plastic material such as polypropylene or polycarbonate.
During assembly, the cannula 16, ferrule 50, septum 52, and septum retainer 54 are inserted into the bore 44 of the cannula housing 12 with the distal end 17 of the cannula extending out of the forward end 46 of the housing. An inner connection end of the cannula is preferably connected to the ferrule, but may alternatively be directly connected to cannula housing 12. .
With particular reference now to FIGS. 11 through 16, the needle housing 14 includes a main body portion 70 with a pair of collinear stepped bores 72, 74 of increasing diameter formed therein. The bore 72 is the smallest in diameter and extends from a forward end 76 of the main body 70 to the bore 74. The bore 74 in turn extends between the bore 72 and the rearward end 78 of the needle housing 14. The bores 72, 74 may extend at an angle of about 0° (parallel to the bottom surface 32) to about 30° with respect to the bottom surface 32 of the cannula housing 12 when assembled, and preferably extend at an angle of approximately 7°..
The needle 58 extends through the bore 72 with an outer end of the needle extending forwardly of the bore 72. Lilcewise, the tubing 18 is positioned in the bore 74 and extends outwardly from the rearward end 78 of the needle housing 14. An upper wall 88 is formed with the main body portion 70 and extends forwardly therefrom. Guide rails 80 and 82 protrude generally downwardly from opposite sides 84 and 86, respectively, of the upper wall 88. Each guide rail includes a relatively straight portion 90 that terminates in a semi-cylindrical portion 92. The semi-cylindrical eportions 92 are adapted to slidably engage the alignment grooves 45, 47 of the cannula housing 12 during assembly for aligning the needle housing 14 with the cannula housing 12. The needle housing is preferably molded of a flexible, resilient plastic material such as polypropylene, polycarbonate, or polyurethane.
In an alternative embodiment, the cross sectional shape of the guide rails and alignment grooves can be square, rectangular, triangular, rounded, or any other suitable shape. Clearance between the guide rails and alignment grooves is preferably on the order of about 0.05 mm to _g_ accurately locate the needle 58 with the septum 52 but still enable the needle housing 14 to slide freely on the cannula housing 12.
Resilient sidewalk 94 and 96 are formed at opposite sides 98 and 100, respectively, of the main body portion 70. The resilient sidewalls 94 and 96 extend forwardly of the forward end 76 and generally parallel to the sides 84 and 86, respectively, of the upper wall 88. The forward ends of the sidewalls 94, 96 are joined together by a resilient, arcuate locking band 102. The band 102 is curved generally upwardly and is adapted to seat within the groove 51 when the housings 12 and 14 are assembled to thereby lock the housings together. A slot 104 is located between the upper wall 88, the resilient sidewalk 94, 96 and the resilient band 102. The sidewalk 94 and 96 flex . inwardly toward each other but are preferably relatively stiff in bending in all other planes. In order to reduce the overall length of the assembled housings, a notch 106 is formed in the upper wall 88 to provide clearance for the protrusion 49.
The upper wall 88 has a sufficient length and the sidewalk 94, 96 and guide rails 80, 82 have a sufficient height to extend beyond the end of the needle 58. In this manner, the needle 58 is well shielded to prevent contact with contaminated surfaces and accidental needle punctures when the needle housing 14 is disconnected from the cannula housing 12.
With reference now to FIGS. 1, 3 and 5, during connection of the needle housing 14 with the cannula housing 12, the guide rails 80, 82 of the needle housing engage the alignment grooves 45, 47, respectively, of the caimula housing to pre-align the needle 58 with the aperture 56 of the septum 52 before the septum is penetrated by the needle. As the needle housing slides onto the cannula housing, the resilient band 102 of the needle housing deflects upwardly over the protrusion 49 of the cannula housing, causing deflection of the sidewalk 94, 96 toward each other. Once the band 102 passes over the protrusion 49, it snaps back to its undeflected position in the groove 51 to thereby lock the housings together. This also results in an audible click or snapping sound which reassures the user that a secure connection has been made.
In order to disconnect the needle housing 14 from the cannula housing 12, the sidewalls 94, 96 are squeezed toward each other with finger pressure to thereby deflect the resilient band 102 above the protrusion 49 on the cannula housing. This allows the needle housing to slide freely off the cannula housing.
The protrusion 49 on the cannula housing 12 preferably has a smooth, rounded rear side 108 (FIG. 6) that blends with the top surface of the cannula housing and a relatively flat forward side 110 nearest the cannula 16. When viewed from above, the base of the protrusion is semi-circular with the forward side adjacent the resilient band 102 to thereby hold the band in the groove 51.
The rounded shape of rear side 108 allows the band 102 to be pushed and flexed over the protrusion 49 without squeezing the sidewalk 94, 96 together. Depending on the amount of sidewall movement desired, the height of the protrusion 49 above the top surface of the cannula housing can be varied in order to vary the amount of band deflection. The height of the protrusion 49 may be approximately equal to the band thickness. In one exemplary embodiment, the band thiclcness and the protrusion height is about 0.75 mm to thereby securely lock the housings and permit easy release of the housings when desired.
While it is possible to use a single flexible sidewall connected through the resilient band to a fixed sidewall or other member, the dual flexible sidewalk 94, 96 provide a degree of safety against accidental release. Since both sidewalk 94, 96 must be simultaneously squeezed toward each other, the needle housing 14 will not be released if one sidewall is inadvertently pressed, since both sidewalls would deflect in the same direction and fail to deflect the resilient band 102.
As shown in FIG. 11, disconnection of the needle housing 14 from the cannula housing 12 can be facilitated by arranging the forward ends of the flexible side members 94, 96 to be narrower in width (in the plane of the shin) than the than the rearward end 108 of the needle housing. This could be achieved in a number of ways such as malting the overall shape of the housing tapered towards the resilient band 102 so that the user would grip the narrower end and pull towards the wider end of the needle housing. According to a preferred embodiment, curved forger recesses 110 ~ are formed on the flexible members at the forward end of the needle housing adjacent the resilient band 102 to thereby provide a natural location for forger and thumb placement when disconnecting the needle housing. The grip may also be enhanced by providing small serrations 112 in the curved recesses.
Referring again to FIG. 5, while the cannula 16 can be molded as an integral part of the cannula housilzg, fabricating the cannula separate from the cannula housing is preferred since the material used for each component can be optimized. The cannula 16 is preferably a thin walled, bio-compatible tube constructed of Teflon, such as polytetrafluorethylene, or other suitable material. Where Teflon tubing is used, it may be necessary to pretreat the attachment end of the cannula prior to adhesively bonding the cannula to the cannula housing 12.
Alternatively, the cannula can be bonded to the ferrule 50. Although the size of the cannula can vary, an outside diameter of approximately 0.6 mm is preferred.
With particular reference to FIGS. 19A, 19B and 20, a further embodiment for connecting the cannula 16 to the cannula housing 12 is shown, wherein like parts in the previous embodiment are represented by like numerals. In this embodiment, a ferrule 120 includes a barb 122 for receiving a heat-shrink tubing 126, which is preferably constructed of Teflon.
A removable metal mandrel 124 that is substantially equivalent in diameter to an insertion needle 130 (FIG. 17) is inserted through the ferrule 120 and heat-shrinlc tubing 126. Heat is then applied to the tubing 126, causing it to shrinlc and deform around the barb 122 of the ferrule and the mandrel 124. Due to the relatively low coefficient of friction associated with the Teflon material, the mandrel 124 is easily removed in a direction denoted by arrow 128 in FIG. 19B. In this manner, the heat-shrink tubing 126 forms the cannula 16, which is tightly held on the ferrule 120. The ferrule and attached cannula 16 can then be installed in the cannula housing 12 together with the septum 52 and septum retainer 54. As shown in FIG. 20, the retainer 54 is cylindrical along a substantial portion of its length, and includes a frustro-conical end portion 132 that faces rearwardly with respect to the cannula housing 12. The rearward end 48 of the cannula housing 12 is then deformed over the frustro-conical end portion 132, such as by heat staking, in order to permanently mount the cannula, ferrule, septum, and septum retainer in the cannula housing.
Referring now to FIGS. 23A, 23B and 24, a further embodiment for connecting the cannula 16 to the cannula housing 12 is shown, wherein like parts in the previous embodiments are represented by like numerals. In this embodiment, a ferrule 140 is provided with a hollow shaft portion 142 and a hollow conical portion 144 connected to one end of the shaft portion. The inner diameter of the shaft portion is preferably slightly greater than the outer diameter of the insertion needle 130 (FIG. 17) so that the insertion needle is free to slide within the ferrule 140. In order to install the cannula 16 on the ferrule 140, an attachment end 146 of the cannula 16 is heated to soften the attachment end. The shaft portion 142 is then inserted into the attachment end 146, thereby expanding the diameter of the attachment end and creating a tight seal between the cannula 16 and the ferrule 140. As shown in FIG. 24, the septum 52 acts as a biasing member to press the expanded attachment end 146 against the opening of the bore 40 to thereby form a compression seal.
With reference now to FIGS. 17 and 18, an insertion needle housing 150 for use with the cannula housing 12 is illustrated. The insertion needle housing 15 generally resembles the needle housing 14, with the exception that a handle 152 is formed at the rearward end 78 of the housing, and an insertion needle 130 is provided. The needles used in both the needle housing and insertion needle assembly are preferably 27 gauge 304 stainless steel tubing beveled at one end to create a sharp angled edge. As shown, the handle is generally hour-glass in shape with a gripping surface 154 located between the rearward end 78 and an enlarged head 156. The hourglass shape of the handle 152 improves the grip during installation of the cannula 16 in the skin and mounting of the cannula housing 12 on the skin.
When the insertion needle assembly is connected to the cannula housing assembly with the same guide rail, sidewall and band configuration as the needle housing 12, the end of the insertion needle 130 extends beyond the outer free end of the cannula 16, wluch may be about 2 or 3 rnm.
The handle 152 on the insertion needle housing 150 allows the combined assembly of the insertion needle housing 150 and cannula housing 12 to be grasped with one hand while pinching a fold of slcin with the other hand. The combined assembly can then be pressed into the pinched skin until the needle 130 punctures the skin along with the cannula. The mounting pad 30 can then be attached to the surface of the skin. This may be accomplished by removing a protective backing layer (not shown) to expose an adhesive layer on a lower surface of the mounting pad. ~nce the cannula housing 12 and cannula 16 are properly mounted, the insertion needle housing 1 SO is removed by pinching the resilient sidewalls 94, 96 to release the band 102 from the groove 51 in the cannula housing 12. The needle housing 14 can then be attached to the cannula housing 12 to begin delivery of the medication or other fluid.
With reference now to FIGS. 21 and 22, an insertion needle housing 160 according to a fiuther embodiment of the invention for use with the cannula housing 12 is illustrated, wherein like parts in the previous embodiments are represented by like numerals. The insertion needle housing 160 is substantially similar to the insertion needle housing 150, with the exception that a handle 162 has a different configuration than the handle 152. As shown, the handle 162 is generally rectangular and includes first, second and third gripping surfaces 164, 166, and 168, respectively.
The gripping surfaces are preferably curved generally inwardly to thereby prevent or reduce inadvertent slipping during mounting of the cannula housing 12 and cannula 16.
With reference now to FIGS. 25, 26, 27 and 28, an infusion set 180 according to a fiuther embodiment of the invention is illustrated, wherein like parts in the previous embodiments are represented by like numerals. The insertion needle housing 182 is substantially similar to the insertion needle housing 14, with the exception that the housing has only one resilient sidewall 183 formed at one side 184 of the main body portion 70. Except for the use of only one resilient sidewall, the needle housing 182 is structurally the same as the needle housing 14, or may, if desired, the needle housing 14 may have the structure of the other alternative embodiments described herein. The forward end of resilient sidewall 183 is joined to curved band 102 which is adapted to seat within a groove in the cannula housing 12. The needle housing 182 is joined to the cannula housing 12. During connection of the needle housing 180 with the cannula housing 12, the guide rails 80, 82. of the needle housing engage the alignment grooves 45, 47, respectively, of the cannula housing to pre-align a needle (not shown) with the aperture of the septum before the septum is penetrated by the needle. As the needle housing slides into the cannula housing, the resilient band 102 of the needle housing deflects upwardly over the protrusion 49 of the cannula housing, causing deflection of the single sidewall 183 laterally inward. ~nce the band 102 passes over the protrusion 49, it snaps back to its undeflected position in the groove to thereby lock the housings together. This also results in an audible click or snapping sound which reassures the user that a secure connection has been made.
To disconnect the needle housing 180 from the cannula housing 12, the one sidewall 183 is squeezed laterally inward with forger pressure to thereby deflect the resilient band 102 above the protrusion on the cannula housing. This allows the needle housing to slide freely off the cannula housing.
Finally, for ease of further understanding the invention, FIG. 29 is a perspective view of the assembled infusion set illustrated in FIGS. 1 through 16. FIG. 30 is a perspective of the cannula housing with the needle housing removed to better show how the parts fit together.
FIG. 31 is a perspective view of the needle housing shown in FIGS. 20 and 21, again, to better show the operability of the device.
While the invention has been taught with specific reference to the above-described embodiments, those spilled in the art will recognize that changes can be made in form and detail without departing from the spirit and the scope of the invention. Thus, the described embodiments are to be considered in all respects only as illustrative and not restrictive.
The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description.
All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (24)
1. An infusion set, comprising:
a cannula housing adapted for mounting onto a person's skin, said cannula housing having a locking element positioned thereon;
the cannula housing being adapted for connection to a cannula extending therefrom;
a needle housing adapted for connection to the cannula housing, the needle housing having at least a first flexible sidewall and a resilient band connected to the sidewall for deformation upon deflection of the sidewall, the resilient band being lockably engageable with the locking element to thereby secure the housings together, the resilient band being releasable from the locking element upon deflection of the sidewall to thereby deform the resilient band out of locking engagement with the locking element; and a hollow needle connected to the needle housing for delivering fluid to the cannula from a fluid source.
a cannula housing adapted for mounting onto a person's skin, said cannula housing having a locking element positioned thereon;
the cannula housing being adapted for connection to a cannula extending therefrom;
a needle housing adapted for connection to the cannula housing, the needle housing having at least a first flexible sidewall and a resilient band connected to the sidewall for deformation upon deflection of the sidewall, the resilient band being lockably engageable with the locking element to thereby secure the housings together, the resilient band being releasable from the locking element upon deflection of the sidewall to thereby deform the resilient band out of locking engagement with the locking element; and a hollow needle connected to the needle housing for delivering fluid to the cannula from a fluid source.
2. An infusion set according to claim 1, wherein the needle housing further comprises a second sidewall spaced from the first sidewall, with the resilient band extending between and connected to the first and second sidewalls, such that depression of the first and second side walls toward each other causes the resilient band to deform out of locking engagement with the locking element to thereby disconnect the housings.
3. An infusion set according to claim 2, wherein the first and second sidewalls taper toward the resilient band.
4. An infusion set according to claim 1, wherein the locking element comprises a protrusion formed on an upper surface of the cannula housing for engaging the resilient band.
5. An infusion set according to claim 4, wherein the locking element further comprises a groove formed in the upper surface of the cannula housing adjacent the protrusion, the groove being sized to receive the resilient band.
6. An infusion set according to claim 1, and further comprising:
a ferrule mounted in the cannula housing such that a cannula can be connected to a forward end of the ferrule; and a septum connected at a rearward end of the ferrule to seal the ferrule against ingress and egress of fluid when the housings are disconnected, the hollow needle extending through the septum and into the ferrule when the housings are connected.
a ferrule mounted in the cannula housing such that a cannula can be connected to a forward end of the ferrule; and a septum connected at a rearward end of the ferrule to seal the ferrule against ingress and egress of fluid when the housings are disconnected, the hollow needle extending through the septum and into the ferrule when the housings are connected.
7. An infusion set according to claim 6, and further comprising at least one alignment groove formed on one of the housings and at least one guide rail formed on the other housing, the alignment groove and guide rail being engageable during sliding movement of the housings to thereby center the hollow needle relative to the septum and ferrule during connection of the housings.
8. An infusion set according to claim 6, wherein a barb is formed on the forward end of the ferrule and a connection end of the cannula is in sealing engagement with the barb.
9. An infusion set according to claim 8, wherein the cannula housing includes a bore through which a cannula can extend.
10. An infusion set according to claim 9, wherein the septum is constructed of a resilient material that biases the connection end of the cannula into sealing engagement with an edge of the bore.
11. An infusion set according to claim 6, and further comprising a septum retainer mounted between the cannula housing and the septum.
12. An infusion set according to claim 1, wherein the resilient sidewall extends beyond a distal end of the hollow needle to thereby prevent the needle from touching a contaminated surface.
13. An infusion set according to claim 12, wherein the needle housing further comprises an upper wall that extends beyond a distal end of the hollow needle.
14. An infusion set, comprising:
a cannula housing adapted for mounting onto a patient's skin;
a hollow needle for delivering fluid to the cannula from a fluid source; and a needle housing adapted for connection to the cannula housing, the needle housing having a main body for holding the hollow needle such that a distal end of the hollow needle extends beyond the main body, the needle housing further having first and second resilient sidewalls and an upper wall extending from the main body beyond a distal end of the hollow needle to thereby prevent inadvertent contact of the hollow needle with contaminated surfaces when the needle housing is separated from the cannula housing.
a cannula housing adapted for mounting onto a patient's skin;
a hollow needle for delivering fluid to the cannula from a fluid source; and a needle housing adapted for connection to the cannula housing, the needle housing having a main body for holding the hollow needle such that a distal end of the hollow needle extends beyond the main body, the needle housing further having first and second resilient sidewalls and an upper wall extending from the main body beyond a distal end of the hollow needle to thereby prevent inadvertent contact of the hollow needle with contaminated surfaces when the needle housing is separated from the cannula housing.
15. An infusion set according to claim 14, wherein the sidewalls are flexible, and further comprising a resilient band extending between and connected to the sidewalls for deformation upon deflection of the sidewalls toward each other, the resilient band being lockably engageable with the cannula housing to thereby secure the housings together, the resilient band being releasable from the cannula housing upon deflection of the sidewalls to thereby deform the resilient band out of locking engagement with the cannula housing.
16. An infusion set according to claim 15, and further comprising a groove formed in the upper surface of the cannula housing, the groove being sized to receive the resilient band.
17. An infusion set according to claim 16, and further comprising a locking protrusion formed on an upper surface of the cannula housing adjacent the groove for engaging the resilient band.
18. An infusion set according to claim 15, wherein the sidewalls taper toward the resilient band.
19. An infusion set according to claim 14, and further comprising:
a ferrule mounted in the cannula housing such that a cannula can be connected to a forward end of the ferrule; and a septum connected at a rearward end of the ferrule to seal the ferrule against ingress and egress of fluid when the housings are disconnected, the hollow needle extending through the septum and into the ferrule when the housings are connected.
a ferrule mounted in the cannula housing such that a cannula can be connected to a forward end of the ferrule; and a septum connected at a rearward end of the ferrule to seal the ferrule against ingress and egress of fluid when the housings are disconnected, the hollow needle extending through the septum and into the ferrule when the housings are connected.
20. An infusion set according to claim 19, and further comprising at least one alignment groove formed on one of the housings and at least one guide rail formed on the other housing, the alignment groove and guide rail being engageable during sliding movement of the housings to thereby center the hollow needle relative to the septum and ferrule during connection of the housings.
21. An infusion set according to claim 19, wherein a barb is formed on the forward end of the ferrule for connection to the connection end of a cannula in sealing engagement with the barb.
22. An infusion set according to claim 21, wherein the cannula housing includes a bore through which the cannula extends.
23. An infusion set according to claim 21, wherein the septum is constructed of a resilient material that biases the connection end of the cannula into sealing engagement with an edge of the bore.
24. An infusion set according to claim 19, and further comprising a septum retainer mounted between the cannula housing and the septum.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/625,245 US6572586B1 (en) | 2000-07-25 | 2000-07-25 | Low profile infusion set |
| US09/625,245 | 2000-07-25 | ||
| PCT/US2001/040896 WO2002007804A1 (en) | 2000-07-25 | 2001-06-08 | Low profile infusion set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2417183A1 CA2417183A1 (en) | 2002-01-31 |
| CA2417183C true CA2417183C (en) | 2009-06-02 |
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ID=24505188
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002417183A Expired - Lifetime CA2417183C (en) | 2000-07-25 | 2001-06-08 | Low profile infusion set |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US6572586B1 (en) |
| EP (1) | EP1305068B1 (en) |
| JP (1) | JP4871484B2 (en) |
| AT (1) | ATE384545T1 (en) |
| AU (1) | AU2001270317A1 (en) |
| CA (1) | CA2417183C (en) |
| DE (1) | DE60132592T2 (en) |
| DK (1) | DK1305068T3 (en) |
| ES (1) | ES2296769T3 (en) |
| IL (2) | IL153815A0 (en) |
| WO (1) | WO2002007804A1 (en) |
Families Citing this family (128)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6808514B2 (en) * | 2000-10-17 | 2004-10-26 | Patricia G. Schneider | Emergency medical dispensing card |
| AU2002245588A1 (en) * | 2001-03-04 | 2002-09-19 | Sterling Medivations, Inc. | Infusion hub assembly and fluid line disconnect system |
| EP1383560B2 (en) | 2001-04-06 | 2023-04-26 | F. Hoffmann-La Roche AG | Infusion set |
| US8034026B2 (en) | 2001-05-18 | 2011-10-11 | Deka Products Limited Partnership | Infusion pump assembly |
| JP4681795B2 (en) | 2001-05-18 | 2011-05-11 | デカ・プロダクツ・リミテッド・パートナーシップ | Fluid pump infusion set |
| US6830562B2 (en) | 2001-09-27 | 2004-12-14 | Unomedical A/S | Injector device for placing a subcutaneous infusion set |
| US7338465B2 (en) * | 2002-07-02 | 2008-03-04 | Patton Medical Devices, Lp | Infusion device and method thereof |
| US20040051019A1 (en) * | 2002-09-02 | 2004-03-18 | Mogensen Lasse Wesseltoft | Apparatus for and a method of adjusting the length of an infusion tube |
| DK200201823A (en) | 2002-11-26 | 2004-05-27 | Maersk Medical As | Connection piece for a hose connection |
| US20040143218A1 (en) * | 2003-01-21 | 2004-07-22 | Animas Corporation | Needle having optimum grind for reduced insertion force |
| US20040158202A1 (en) * | 2003-02-12 | 2004-08-12 | Soren Jensen | Cover |
| US7070580B2 (en) * | 2003-04-01 | 2006-07-04 | Unomedical A/S | Infusion device and an adhesive sheet material and a release liner |
| JP2004305466A (en) * | 2003-04-08 | 2004-11-04 | Nipro Corp | Medical connector set and catheter set for dwelling using the same |
| JP3864925B2 (en) * | 2003-04-08 | 2007-01-10 | ニプロ株式会社 | Indwelling catheter set |
| JP4565193B2 (en) | 2003-04-23 | 2010-10-20 | バレリタス， インコーポレイテッド | Hydraulically operated pump for long duration pharmaceutical administration |
| US8029454B2 (en) | 2003-11-05 | 2011-10-04 | Baxter International Inc. | High convection home hemodialysis/hemofiltration and sorbent system |
| US7520867B2 (en) * | 2003-11-10 | 2009-04-21 | Medtronic Minimed, Inc. | Subcutaneous infusion set |
| US7699808B2 (en) * | 2003-11-10 | 2010-04-20 | Smiths Medical Asd, Inc. | Subcutaneous infusion device and method |
| US7699807B2 (en) * | 2003-11-10 | 2010-04-20 | Smiths Medical Asd, Inc. | Device and method for insertion of a cannula of an infusion device |
| US7731691B2 (en) * | 2003-11-10 | 2010-06-08 | Smiths Medical Asd, Inc. | Subcutaneous infusion device and device for insertion of a cannula of an infusion device and method |
| US7494481B2 (en) * | 2004-12-03 | 2009-02-24 | Medtronic Minimed, Inc. | Multi-position infusion set device and process |
| US7850658B2 (en) * | 2003-11-10 | 2010-12-14 | Smiths Medical Asd, Inc. | Subcutaneous infusion device and method including release feature for adhesive portion |
| US7309326B2 (en) * | 2003-11-18 | 2007-12-18 | Icu Medical, Inc. | Infusion set |
| US7150726B2 (en) * | 2004-01-23 | 2006-12-19 | Norfolk Medical | Device for subcutaneous infusion of fluids |
| US7744555B2 (en) * | 2004-02-06 | 2010-06-29 | Depuy Spine, Inc. | Implant having a photocatalytic unit |
| US8267883B2 (en) * | 2004-02-06 | 2012-09-18 | Depuy Spine, Inc. | Photocatalytic implant having a sensor |
| EP1566193A1 (en) * | 2004-02-18 | 2005-08-24 | Unomedical a/s | Infusion device provided with septum housing |
| CN100528254C (en) * | 2004-03-26 | 2009-08-19 | 优诺医疗有限公司 | Injector device for infusion set |
| US8287516B2 (en) | 2004-03-26 | 2012-10-16 | Unomedical A/S | Infusion set |
| US7585287B2 (en) * | 2004-06-16 | 2009-09-08 | Smiths Medical Md, Inc. | Device and method for insertion of a cannula of an infusion device |
| US20060004317A1 (en) * | 2004-06-30 | 2006-01-05 | Christophe Mauge | Hydrocephalus shunt |
| US9089636B2 (en) | 2004-07-02 | 2015-07-28 | Valeritas, Inc. | Methods and devices for delivering GLP-1 and uses thereof |
| AU2011203360B2 (en) * | 2004-07-21 | 2014-01-16 | Animas Corporation | Method and systems for providing an infusion device interface |
| CA2806525C (en) * | 2004-07-21 | 2014-09-16 | Animas Corporation | Method and systems for providing an infusion device interface |
| DE202004011617U1 (en) * | 2004-07-23 | 2004-10-07 | Clinico Gmbh | Coupling device for connecting a medical supply line to a catheter |
| US8062250B2 (en) | 2004-08-10 | 2011-11-22 | Unomedical A/S | Cannula device |
| US20060100581A1 (en) * | 2004-08-13 | 2006-05-11 | Mogensen Lasse W | Reservoir for front end loaded infusion device |
| US7303543B1 (en) * | 2004-12-03 | 2007-12-04 | Medtronic Minimed, Inc. | Medication infusion set |
| WO2006061027A2 (en) | 2004-12-10 | 2006-06-15 | Unomedical A/S | Cannula inserter |
| WO2006077262A1 (en) * | 2005-01-24 | 2006-07-27 | Novo Nordisk A/S | Medical device with protected transcutaneous device |
| WO2006099306A2 (en) * | 2005-03-10 | 2006-09-21 | Custom Medical Applications, Inc. | Catheter connection hub |
| US7985199B2 (en) | 2005-03-17 | 2011-07-26 | Unomedical A/S | Gateway system |
| RU2440831C2 (en) * | 2005-08-22 | 2012-01-27 | Паттон Медикал Дивайсиз, Лп | Devices, systems and methods of liquid introduction |
| CA2619928A1 (en) | 2005-08-22 | 2007-03-01 | Venetec International, Inc. | Catheter securement device |
| PT1762259E (en) | 2005-09-12 | 2010-12-10 | Unomedical As | Inserter for an infusion set with a first and second spring units |
| DE502005009907D1 (en) * | 2005-09-15 | 2010-08-26 | Roche Diagnostics Gmbh | Insertion head with handle |
| CA2563851A1 (en) * | 2005-10-19 | 2007-04-19 | Animas Corporation | Flexible metallic cannula infusion set |
| IL178557A0 (en) * | 2005-10-19 | 2007-02-11 | Animas Corp | Safety infusion set |
| MX2008005782A (en) * | 2005-11-03 | 2008-10-01 | Patton Medical Devices Lp | Fluid delivery devices, systems and methods. |
| USD655807S1 (en) | 2005-12-09 | 2012-03-13 | Unomedical A/S | Medical device |
| EP2077128B1 (en) | 2005-12-23 | 2010-12-22 | Unomedical A/S | Injection Device |
| US7892216B2 (en) * | 2006-02-07 | 2011-02-22 | Icu Medical, Inc. | Infusion set |
| US20070191773A1 (en) * | 2006-02-16 | 2007-08-16 | Animas Corporation | Low profile infusion set |
| US20070191772A1 (en) * | 2006-02-16 | 2007-08-16 | Animas Corporation | Straight insertion safety infusion set |
| EP1988958B2 (en) | 2006-02-28 | 2016-03-16 | Unomedical A/S | Inserter for infusion part |
| EP2005309B1 (en) | 2006-03-30 | 2016-02-17 | Valeritas, Inc. | Multi-cartridge fluid delivery device |
| WO2007140783A2 (en) | 2006-06-07 | 2007-12-13 | Unomedical A/S | Inserter for transcutaneous sensor |
| AU2007256563B2 (en) | 2006-06-09 | 2012-09-27 | Unomedical A/S | Mounting pad |
| AU2007280850B9 (en) | 2006-08-02 | 2010-09-02 | Unomedical A/S | Cannula and delivery device |
| EP1917990A1 (en) * | 2006-10-31 | 2008-05-07 | Unomedical A/S | Infusion set |
| US7993306B2 (en) * | 2006-10-31 | 2011-08-09 | Smiths Medical Asd, Inc. | Subcutaneous infusion device and method including tapered cannula |
| US10154804B2 (en) | 2007-01-31 | 2018-12-18 | Medtronic Minimed, Inc. | Model predictive method and system for controlling and supervising insulin infusion |
| US20080243085A1 (en) * | 2007-03-30 | 2008-10-02 | Animas Corporation | Method for mounting a user releasable side-attach rotary infusion set to an infusion site |
| US20080243084A1 (en) * | 2007-03-30 | 2008-10-02 | Animas Corporation | User-releasable side-attach rotary infusion set |
| US20080243053A1 (en) * | 2007-03-30 | 2008-10-02 | Animas Corporation | Method for inserting a cannula into an infusion site |
| US9186480B2 (en) | 2007-06-20 | 2015-11-17 | Unomedical A/S | Apparatus for making a catheter |
| EP2185224A1 (en) | 2007-07-03 | 2010-05-19 | Unomedical A/S | Inserter having bistable equilibrium states |
| GB2445437B (en) * | 2007-07-06 | 2008-11-26 | Applied Medical Technology Ltd | Cannula insertion device |
| PT2173410E (en) | 2007-07-10 | 2011-05-05 | Unomedical As | Inserter having two springs |
| NZ582226A (en) | 2007-07-18 | 2011-12-22 | Unomedical As | Insertion device with a pivoting action from a first to a second position and longitudinal action to a third position in the direction of insertion. |
| WO2009045622A1 (en) * | 2007-08-10 | 2009-04-09 | Medi-Life Cards, Llc | Method and apparatus for auto injection of a therapeutic |
| BRPI0907715A2 (en) | 2008-02-13 | 2017-06-13 | Unomedical As | seal between a cannula part and a fluid path |
| EP2259816B1 (en) | 2008-02-20 | 2015-10-21 | Unomedical A/S | Insertion device with horizontally moving part |
| US8034047B2 (en) * | 2008-05-21 | 2011-10-11 | Custom Medical Applications, Inc. | Catheter connection hub |
| US8016789B2 (en) | 2008-10-10 | 2011-09-13 | Deka Products Limited Partnership | Pump assembly with a removable cover assembly |
| US8267892B2 (en) | 2008-10-10 | 2012-09-18 | Deka Products Limited Partnership | Multi-language / multi-processor infusion pump assembly |
| US8066672B2 (en) | 2008-10-10 | 2011-11-29 | Deka Products Limited Partnership | Infusion pump assembly with a backup power supply |
| US9180245B2 (en) | 2008-10-10 | 2015-11-10 | Deka Products Limited Partnership | System and method for administering an infusible fluid |
| US8223028B2 (en) | 2008-10-10 | 2012-07-17 | Deka Products Limited Partnership | Occlusion detection system and method |
| US8708376B2 (en) | 2008-10-10 | 2014-04-29 | Deka Products Limited Partnership | Medium connector |
| US8262616B2 (en) | 2008-10-10 | 2012-09-11 | Deka Products Limited Partnership | Infusion pump assembly |
| MX2011005735A (en) | 2008-12-22 | 2011-06-21 | Unomedical As | Medical device comprising adhesive pad. |
| US8807169B2 (en) | 2009-02-12 | 2014-08-19 | Picolife Technologies, Llc | Flow control system for a micropump |
| WO2011014492A1 (en) | 2009-07-29 | 2011-02-03 | Smiths Medical Asd, Inc. | Device and method for insertion of a cannula of an infusion device |
| CA2769030C (en) | 2009-07-30 | 2016-05-10 | Tandem Diabetes Care, Inc. | Infusion pump system with disposable cartridge having pressure venting and pressure feedback |
| BR112012002050A2 (en) | 2009-07-30 | 2016-05-17 | Unomedical As | inserter device with part of horizontal movement. |
| JP2013500805A (en) | 2009-08-07 | 2013-01-10 | ウノメディカル・アー／エス | Dosing device having a sensor and one or more cannulas |
| US8323249B2 (en) | 2009-08-14 | 2012-12-04 | The Regents Of The University Of Michigan | Integrated vascular delivery system |
| EP2554110B1 (en) | 2010-01-22 | 2014-07-30 | Lifescan, Inc. | Analyte testing method and system |
| JP2013523233A (en) | 2010-03-30 | 2013-06-17 | ウノメディカル アクティーゼルスカブ | Medical device |
| WO2011146769A2 (en) | 2010-05-19 | 2011-11-24 | Tangent Medical Technologies Llc | Integrated vascular delivery system |
| US8814833B2 (en) | 2010-05-19 | 2014-08-26 | Tangent Medical Technologies Llc | Safety needle system operable with a medical device |
| EP2397180B1 (en) | 2010-06-18 | 2014-01-22 | F. Hoffmann-La Roche AG | Infusion site interface with improved tubing connection |
| DK2397181T3 (en) | 2010-06-18 | 2014-03-31 | Hoffmann La Roche | Insertion device with a permanently lockable and rotatable needle cover means |
| WO2011157638A1 (en) | 2010-06-18 | 2011-12-22 | F. Hoffmann-La Roche Ag | Infusion site interfaces and insertion devices for infusion site interfaces |
| EP2433663A1 (en) | 2010-09-27 | 2012-03-28 | Unomedical A/S | Insertion system |
| EP2436412A1 (en) | 2010-10-04 | 2012-04-04 | Unomedical A/S | A sprinkler cannula |
| CN103957962B (en) | 2011-10-05 | 2017-07-07 | 犹诺医药有限公司 | Insert for inserting multiple percutaneous parts simultaneously |
| EP2583715A1 (en) | 2011-10-19 | 2013-04-24 | Unomedical A/S | Infusion tube system and method for manufacture |
| US9440051B2 (en) | 2011-10-27 | 2016-09-13 | Unomedical A/S | Inserter for a multiplicity of subcutaneous parts |
| US8771229B2 (en) | 2011-12-01 | 2014-07-08 | Picolife Technologies, Llc | Cartridge system for delivery of medicament |
| US8790307B2 (en) | 2011-12-01 | 2014-07-29 | Picolife Technologies, Llc | Drug delivery device and methods therefor |
| US10130759B2 (en) | 2012-03-09 | 2018-11-20 | Picolife Technologies, Llc | Multi-ported drug delivery device having multi-reservoir cartridge system |
| US9883834B2 (en) | 2012-04-16 | 2018-02-06 | Farid Amirouche | Medication delivery device with multi-reservoir cartridge system and related methods of use |
| US9180242B2 (en) | 2012-05-17 | 2015-11-10 | Tandem Diabetes Care, Inc. | Methods and devices for multiple fluid transfer |
| US10245420B2 (en) | 2012-06-26 | 2019-04-02 | PicoLife Technologies | Medicament distribution systems and related methods of use |
| US10039912B2 (en) * | 2012-07-10 | 2018-08-07 | St. Jude Medical, Atrial Fibrillation Division, Inc. | System and method for coupling a tube with a medical device handle |
| KR101343833B1 (en) * | 2013-01-14 | 2013-12-20 | 연세대학교 산학협력단 | Kit used for a central venous line |
| US9173998B2 (en) | 2013-03-14 | 2015-11-03 | Tandem Diabetes Care, Inc. | System and method for detecting occlusions in an infusion pump |
| US20150005703A1 (en) * | 2013-06-28 | 2015-01-01 | Animas Corporation | Drug infusion device with safety interlock |
| US10279105B2 (en) | 2013-12-26 | 2019-05-07 | Tandem Diabetes Care, Inc. | System and method for modifying medicament delivery parameters after a site change |
| EP3102258A4 (en) | 2014-02-04 | 2017-12-27 | ICU Medical, Inc. | Self-priming systems and methods |
| CN206518747U (en) * | 2014-04-24 | 2017-09-26 | 贝克顿·迪金森公司 | Catheter insertion apparatus |
| US9895489B2 (en) * | 2015-09-01 | 2018-02-20 | Michael Merchant | Angled retractable needle |
| US9827369B2 (en) | 2016-03-16 | 2017-11-28 | Baxter International Inc. | Percutaneous administration device and method for injecting medicinal substances |
| US11229753B2 (en) | 2016-04-29 | 2022-01-25 | Smiths Medical Asd, Inc. | Subcutaneous insertion systems, devices and related methods |
| EP3284507B1 (en) | 2016-08-19 | 2023-12-13 | Roche Diabetes Care GmbH | Cannula unit |
| EP3290073B1 (en) | 2016-08-29 | 2020-12-09 | Roche Diabetes Care GmbH | Connector device |
| EP3329956A1 (en) | 2016-11-30 | 2018-06-06 | Roche Diabetes Care GmbH | Method for manufacturing a cannula unit |
| US10413658B2 (en) | 2017-03-31 | 2019-09-17 | Capillary Biomedical, Inc. | Helical insertion infusion device |
| EP3672681A1 (en) | 2017-08-22 | 2020-07-01 | Roche Diabetes Care GmbH | Self-sealing septum |
| US10389061B2 (en) * | 2017-11-17 | 2019-08-20 | Te Connectivity Corporation | Electrical connector having a rear seal and a rear-loaded cover/retainer member |
| EP3501593A1 (en) | 2017-12-22 | 2019-06-26 | Roche Diabetes Care GmbH | Septum arrangement |
| US10828419B2 (en) * | 2018-09-04 | 2020-11-10 | Medtronic Minimed, Inc. | Infusion set with pivoting metal cannula and strain relief |
| ES2958612T3 (en) | 2018-12-19 | 2024-02-12 | Hoffmann La Roche | Overmolded partition |
| US10820933B1 (en) | 2019-07-15 | 2020-11-03 | Osteon Medical LLC | Kyphoplasty system and method |
| US11565084B2 (en) * | 2020-05-01 | 2023-01-31 | Np Medical Inc. | Low profile catheter system |
| US11903628B1 (en) | 2023-04-20 | 2024-02-20 | Osteon Medical LLC | Kyphoplasty system and method |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755173A (en) | 1986-02-25 | 1988-07-05 | Pacesetter Infusion, Ltd. | Soft cannula subcutaneous injection set |
| US4734092A (en) | 1987-02-18 | 1988-03-29 | Ivac Corporation | Ambulatory drug delivery device |
| US4880412A (en) | 1988-02-09 | 1989-11-14 | Sol Weiss | Tube insertion apparatus |
| US5176662A (en) | 1990-08-23 | 1993-01-05 | Minimed Technologies, Ltd. | Subcutaneous injection set with improved cannula mounting arrangement |
| US5186712A (en) | 1991-08-23 | 1993-02-16 | Kansas Creative Devices, Inc. | Intravenous catheter launching device |
| US5545143A (en) | 1993-01-21 | 1996-08-13 | T. S. I. Medical | Device for subcutaneous medication delivery |
| DK25793A (en) | 1993-03-09 | 1994-09-10 | Pharma Plast Int As | Infusion set for intermittent or continuous administration of a therapeutic agent |
| US5257980A (en) | 1993-04-05 | 1993-11-02 | Minimed Technologies, Ltd. | Subcutaneous injection set with crimp-free soft cannula |
| US5997501A (en) | 1993-11-18 | 1999-12-07 | Elan Corporation, Plc | Intradermal drug delivery device |
| US5545152A (en) * | 1994-10-28 | 1996-08-13 | Minimed Inc. | Quick-connect coupling for a medication infusion system |
| ZA9610374B (en) | 1995-12-11 | 1997-06-23 | Elan Med Tech | Cartridge-based drug delivery device |
| US5954643A (en) | 1997-06-09 | 1999-09-21 | Minimid Inc. | Insertion set for a transcutaneous sensor |
| US6056718A (en) * | 1998-03-04 | 2000-05-02 | Minimed Inc. | Medication infusion set |
| US5980506A (en) | 1998-03-20 | 1999-11-09 | Mathiasen; Orla | Subcutaneous infusion device |
| US6086575A (en) * | 1998-03-20 | 2000-07-11 | Maersk Medical A/S | Subcutaneous infusion device |
| DE19821723C2 (en) * | 1998-05-14 | 2000-07-06 | Disetronic Licensing Ag | Catheter head for subcutaneous administration of an active ingredient |
-
2000
- 2000-07-25 US US09/625,245 patent/US6572586B1/en not_active Expired - Lifetime
-
2001
- 2001-06-08 IL IL15381501A patent/IL153815A0/en active IP Right Grant
- 2001-06-08 JP JP2002513536A patent/JP4871484B2/en not_active Expired - Lifetime
- 2001-06-08 AT AT01948895T patent/ATE384545T1/en not_active IP Right Cessation
- 2001-06-08 DK DK01948895T patent/DK1305068T3/en active
- 2001-06-08 EP EP01948895A patent/EP1305068B1/en not_active Expired - Lifetime
- 2001-06-08 CA CA002417183A patent/CA2417183C/en not_active Expired - Lifetime
- 2001-06-08 DE DE60132592T patent/DE60132592T2/en not_active Expired - Lifetime
- 2001-06-08 ES ES01948895T patent/ES2296769T3/en not_active Expired - Lifetime
- 2001-06-08 WO PCT/US2001/040896 patent/WO2002007804A1/en active IP Right Grant
- 2001-06-08 AU AU2001270317A patent/AU2001270317A1/en not_active Abandoned
-
2003
- 2003-01-06 IL IL153815A patent/IL153815A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP1305068B1 (en) | 2008-01-23 |
| EP1305068A1 (en) | 2003-05-02 |
| EP1305068A4 (en) | 2005-07-20 |
| DE60132592T2 (en) | 2008-05-21 |
| CA2417183A1 (en) | 2002-01-31 |
| ES2296769T3 (en) | 2008-05-01 |
| IL153815A0 (en) | 2003-07-31 |
| WO2002007804A1 (en) | 2002-01-31 |
| JP2004504116A (en) | 2004-02-12 |
| DE60132592D1 (en) | 2008-03-13 |
| US6572586B1 (en) | 2003-06-03 |
| DK1305068T3 (en) | 2008-06-02 |
| ATE384545T1 (en) | 2008-02-15 |
| AU2001270317A1 (en) | 2002-02-05 |
| JP4871484B2 (en) | 2012-02-08 |
| IL153815A (en) | 2007-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20210608 |