CA1322310C - Flow enhanced multi-lumen venous catheter device - Google Patents
Flow enhanced multi-lumen venous catheter deviceInfo
- Publication number
- CA1322310C CA1322310C CA000569890A CA569890A CA1322310C CA 1322310 C CA1322310 C CA 1322310C CA 000569890 A CA000569890 A CA 000569890A CA 569890 A CA569890 A CA 569890A CA 1322310 C CA1322310 C CA 1322310C
- Authority
- CA
- Canada
- Prior art keywords
- lumen
- distal
- terminus
- catheter tube
- proximal
- 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 - Fee Related
Links
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
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
- A61B5/02152—Measuring pressure in heart or blood vessels by means inserted into the body specially adapted for venous pressure
-
- 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
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
- A61M2025/004—Multi-lumen catheters with stationary elements characterized by lumina being arranged circumferentially
-
- 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
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
- A61M2025/0073—Tip designed for influencing the flow or the flow velocity of the fluid, e.g. inserts for twisted or vortex flow
Abstract
ABSTRACT OF THE DISCLOSURE
A venous catheter device includes an elongated flexible catheter tube having a proximal end and a longitudinally extend-ing the distal end portion with a catheter tube distal terminus for insertion into and capable of being fed longitudinally through a vein. A plurality of independent lumens extend through the catheter tube, preferably including a distal lumen, a middle lumen and a proximal lumen, each of the lumens having a wall, a proximal end, and a lumen distal terminus adjacent to the cathe-ter tube distal terminus. Each lumen distal terminus spaced lon-gitudinally from each other so as to include a distal lumen ter-minus, a middle lumen terminus, and a proximal lumen terminals, respectively. At least two of the lumen termini have a fluid flow enhancement structure for maximizing fluid flux rate through each lumen by directing flow through the distal terminus of each lumen in a direction parallel to the longitudinal direction of the distal end portion, Each of the proximal ends of the lumens include lumen adaptors for connection to independent fluid devices. It is preferable that the fluid flow enhancement struc-ture includes longitudinal grooves located in the outer wall of the distal end portion and axially aligned with the respective lumens.
A venous catheter device includes an elongated flexible catheter tube having a proximal end and a longitudinally extend-ing the distal end portion with a catheter tube distal terminus for insertion into and capable of being fed longitudinally through a vein. A plurality of independent lumens extend through the catheter tube, preferably including a distal lumen, a middle lumen and a proximal lumen, each of the lumens having a wall, a proximal end, and a lumen distal terminus adjacent to the cathe-ter tube distal terminus. Each lumen distal terminus spaced lon-gitudinally from each other so as to include a distal lumen ter-minus, a middle lumen terminus, and a proximal lumen terminals, respectively. At least two of the lumen termini have a fluid flow enhancement structure for maximizing fluid flux rate through each lumen by directing flow through the distal terminus of each lumen in a direction parallel to the longitudinal direction of the distal end portion, Each of the proximal ends of the lumens include lumen adaptors for connection to independent fluid devices. It is preferable that the fluid flow enhancement struc-ture includes longitudinal grooves located in the outer wall of the distal end portion and axially aligned with the respective lumens.
Description
~322~ 0 FLOW ENHANCED MULTI-LUMEN VENOUS CATHETER DEVICE
BACKGROUND OF THE INVENTION
The invention relates to v~nous catheter devices, and more particularly, to a single catheter device that may be used to infuse multiple fluids, including nourishment and drugs, crystalloids, colloids, and blood and~or blood products, simultaneously into a patient's vein. In addition, the catheter of the present invention may ~e used for central venous pressure (CVP) monitoring and/or removal of blood samples simultaneously with drug and/or fluid infusion. Even more particularly, the present invention relates to multi- ~
lumen venous catheter devices such as those disclosed in U.S. ~-Patent No. Re. 31,873 to Randolph M. Howes.
The Howes '873 patent discloses a multi-lumen venous catheter device having a distal end portion generally circular in cross-section and having a uniform outer diameter. The distal termini of lumens are spaced from each other. One lumen has a distal terminus adjacent the distal terminus of tha catheter tube. The distal termini of the other lumens provide exits at lateral openings in the distal end portion of the catheter tube.
Since the catheter device shown in the Howes '873 patent has multiple lumens which are adapted for multiple and simult~neous operations through use of a single catheter tube, it provides a-substantial advance over conventional venous catheter devices by reducing the number of catheter devices required to be inserted in a patient at a single time when performing multiple functions or procedures. It also prevents X 1 ~
::
~322~10 the drugs and fluids from mixing prior to entering the bloodstream thereby avoiding incompatibility problems. In addit.ion, it minimizes patient discomfort and decreases the possibility of associated complicati.ons suc~h as infection and bleeding.
Even though undesirable mixing is prevented and patient discomfort is minimized by this arrangement of longitudinally spaced lumen termini in a multi-lumen catheter tube with a uniform outer diameter, the fluid flux rate through the lumens is reduced relative to the fluid flux rate of some single lumen catheters previously available.
The catheters shown in the Howes '873 patent also create turbulence and provide sites for blood material such as platelets and red blood cells to accumulate or be deposited and form clots due to thrombus and fibrinogen accumulation.
Accordingly, it is an object of the present invention to provide a multi-lumen venous catheter device having the advantages of the devices disclosed in the Xowes '~73 patent, which permits infusion of a plurality of fluids into a patient's vein simultaneously through a single catheter without mixing the fluids before entering the hloodstream, while improving the fluid flux rate through each lumen and minimizing sites for the accumulation of deposits of materials likely to initiate clot formation.
It is a further object of the present invention to provide a venous catheter devica with multiple lumens which has these advantages and which also allows improved infusion flow rates of liquids into a vein.
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It is an additional object to the present invention to provide a venous catheter device with multiple lumens which can be interchangeably used in a more efficient and reliable manner for the various purposes for which it is designed.
It is also an ohject of the present invention to provide a venous catheter device with multiple lumens which is more forgiving during infusion processes in the event an improper pressure differential, flow rate or drug concentration is used.
lQ Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice o-f the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
SUMMARY OF THE INVENTION
To achieve the foregoing objects and in accordance with the purposes of the invention as embodied and broadly described herein, there is provided a venous catheter device comprising: an elongated flexible catheter tube having an outer wall, a proximal end and a longitudinally extending distal end portion with a catheter tube distal terminus for insertion into and capable of being fed longitudinally through a vein; a plurality of independent lumens extending through the catheter tube, each lumen having a lumen distal terminus in the distal end portion, the lumen distal terminus of at least one of the lumens being spaced longitudinally from the .~
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lumen distal terminus of at least one other of said lumens, at least one lumen distal terminus communicating with fluid flow enhancement means provided in the outer wall of said catheter tube; and lumen adaptor means provided at the proximal ends of said lumens for permitting connection of said lumens to independent devices.
It is preferable that at least three independent lumens extend through the catheter tube including a distal lumen, a middle lumen and a proximal lumen; each of the lumens having a wall, a proximal end and a lumen distal terminus adjacent the catheter tube distal terminus; each lumen distal terminus being spaced longitudinally from each other so as to include a distal lumen distal terminus, a middle lumen distal terminus, and a proximal lumen distal terminus, respectively; at least two of the lumen distal termini having fluid flow enhancement means for directing flow through the lumen distal terminus in a direction substantially parallel to the longitudinal direction of the distal end portion~ It is further preferable that the fluid flow enhancement means include a longitudinal groove located in the outer wall of the distal end portion, axially aligned and continuous with a respective lumen.
The catheter of the present invention differs from the design of the catheter described in Howes Patent Re. 31,873 in that instead of having a distal end portion which is generally circular in cross-section and of uniform outer diameter, the present catheter, in its preferred form, has a distal end portion which is of irregular and diminishing cross-section in the area where the lumens terminate.
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BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are incorporated in and constitute a part o-f the specification, illustrate a presently preferred embodiment of the invention and, together with the general description given above and the detailed description of the preferred embodiment given below, serve to explain the principl s of the invention.
Fig. 1 shows a catheter device constructed in accordance with a preferred form of the invention.
Fig. 2 is an enlarged partial perspective view of the distal tip of the catheter device shown in Fig. 1.
Fig. 3 is a cross section view of the catheter device taken along line 3-3 of Fig. 2.
Fig. 4 is a cross-section view of the catheter device taken along line 4-4 of Fig. 2.
Fig. 5 is a cross-section view of the catheter device taken along line 5-5 of Fig. 2.
Fig. 6 is a cross-section view of the catheter device taken along line 6-6 of Fig. 2.
Fig. 7 is a side elevation view of the catheter shown in Fig. 1, positioned in a vein, with a venipuncture needle withdrawn and protected, and with the catheter connected to a variety of fluid devices.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Reference will now be made in detail to the present preferred embodiment of the invention as illustrated in the accompanying drawlngs~
In accordance with the present invention, the venous ~ 5 . , : , . .
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. .
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.
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13~23~0 catheter device includes an elongated flexible catheter tube having an outer wall, a proximal end and a longitudinally extending distal end portion with a catheter tube distal terminus for insertion into and capable of being fed longitudinally through a vein.
As shown in Fiys. 1 and 7, the venous catheter device includes catheter 20. The elongated flexib:Le catheter tube includes elongated flexible tube 22. The proximal end of the catheter tube 22 includes proximal end 24 which is connected to fluid or other devices.
The longitudinally extending distal end portion of catheter tube 22 comprises the distal end portion 26 of catheter tube 22 which is inserted into a vein 28 beneath the s]cin 30 of a patient. As shown in Fig. 7, blood flows through vein 28 in a leftward direction as shown by the arrow. In addition, distal end portion 26 of catheter tube 22 is inserted into and is fed longitudinally through vein 28 in the leftward direction as shown. The distal end portion 26 has a distal terminus 32.
In accordance with the present invention there is provided a plurality of independent lumens extending through the catheter tube~ each lumen having a lumen distal terminus in the distal end portion of the catheter. The lumen distal terminus of at least one of the lumens is spaced longitudinally from the lumen distal terminus of at least one other of said lumens. It is preferable that the plurality of lumens include at least three independent lumens extending through the catheter tube, including a distal lumen, a middle , , :: :,. .
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13223~
lumen and a proximal lumen. Each of the lumens has an inner wall, a proximal end and a lumen distal terminus adjacent to the catheter tube distal terminus. The lumen distal termini are spaced longitudinally from each other so as to include a distal lumen distal terminus, a middle lumen distal terminus, and a proximal lumen distal terminus, respectively.
~ s used herein, "lumen" is intended to mean Eluid conduit means and may include individual tubes, or elongated openings or passages formed in a body, or it may include individual tubes connected to elongated passages in a body. "Independent lumens" is intended to mean lumens which do not communicate flow between each other.
As shown in Figs. 2 and 6, the distal, middle and proximal lumens are so named to indicate the relative positions of their respective termini on catheter tube distal end portion 26. Distal lumen 34 extends from the catheter tube proximal end 24 through the catheter tube to distal end portion 26 where it terminates at the lumen distal terminus 36. Middle lumen 38 extends from the catheter tube proximal end 24 through the catheter tube to middle lumen distal terminus 40. Proximal lumen 42 extends from catheter tube proximal end 24 through the catheter tube to proximal lumen distal terminus 44.
As shown in Figs. 2 and 6, distal lumen 34 has a wall 46, middle lumen 38 has a wall 48, and proximal lumen 42 has a wall 50. Each of the lumen walls 46, 48 and 50, extends longitudinally through catheter tube 22 to form a slender passageway which extends to the respective lumen termini 36, .. .. . . . .
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~32231~
40 and 44 (also seen in Fig. 7).
The lumen termini (exit ports) 36, 40 and 44 are longitudinally spaced from each other by at least about one centimeter and up to about three centimeters or more. Thus, when the catheter is positioned in a vein, two or more fluids, or agents such as dyes or medicines, can be infused simul-taneously into the bloodstream using any of the lumens 34, 38 and 42 without mixing prior to entry into the bloodstream. A
spacing of at least about one centimeter between lumen termini is generally sufficient to prevent any mixing problem.
According to the present invention, at least one lumen distal terminus communicates with unique fluid flow enhancement means provided in the outer wall of the catheter tube. It is preferable that each of the middle and proximal lumen termini have a fluid flow enhancement means for maximizing fluid flux rate through each lumen by directiny flow through the distal terminus in a direction substantially parallel to the longitudinal direction of the distal end portion. It also is preferable that the fluid flow enhancement means include a longitudinal groove located in the outer wall of the distal end portion and axially aligned with a respective lumen. It is further preferable that the groove be an extension of the lumen which runs from ths lumen distal terminus to the distal tip of the catheter. It is, however, not necessary that the groove extend all the way to the catheter tip.
As shown in Fig. 2, the fluid flow enhancement means cooperating with proximal lumen terminus 44 includes ~ 8 '` ' ~, , ~
13223~
longitudinally extending groove 52 which is located in the outer wall of distal end portion 26 and is axially aligned with and a continuation of proximal lumen 42. Longitudinal flow through proxîmal lumen 42 continues in an uninterrupted fashion in the longitudinal direction through proximal lumen terminus 4~ and into groove 52, where mixing with the blood stream occurs.
Similarly, the fluid flow enhancement means cooperating with middle lumen terminus 40 includes longitudlnally extending groove 54 which is located in the outer wall of distal end portion 26 and is axially aligned with and continuous from middle lumen 38. Longitudinal flow through middle lumen 38 continues in an uninterrupted fashion in the longitudinal direction through middle lumen terminus 40 and into groove 54, where mixing with the bloodstream occurs.
The catheter disclosed in Howes Patent Re. 31,873 incorporates lumen exit ports which are spaced from the distal terminus of the catheter tube and which constitute lateral openings in the tube. The distal end portion of the '873 catheter is generally circular in cross-section and has a uniEorm outer diameter. In contrast, provision of fluid flow enhancement means in the catheter of the present invention enables infused fluids to flow through all the lumen distal termini in a direction parallel to the longitudinal direction of the distal end portion. This improved flow pattern is permitted by the irregular and diminishing cross~section of the distal end portion from the point of the proximal lumen terminus to the tip. As a result, the present invention ~ 9 . ., ;, ., : . . : , " ' ' ' '' ~ ~ ~ ' .:
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infuses fluids in a different and more efficient manner and with less turbulence at the exit site of the lumen distal termini than the venous catheter device disclosed in the Howes '873 patent.
The improved flow characteristics and reduced turbulence minimize the number of blood or blood component accumulation sites and reduce the risk of clotting. In 1he Howes '873 catheter, the flow through the lumen opening has a substantial component in the lateral direction and a minimum component, if any, in the axial direction because there is a buttress adjacent to the laterally-directed lumen exit ports. In the present device there is a substantial component of axial flow through the lumen openings because of the unique shape of the catheter wall adjacent to the middle and proximal lumen exit ports 40 and 44.
The proximal ends of the lumens are connected to adaptor means for coupling the lumens to independent f]uid and/or other devices. As shown in Fig. 7, a Y connector 61 couples the lumens 34, 38 and 42 with tubes 56, 58 and 63, 20 respectively. Tubes 56, 58 and 60 are provided with adaptors 62, 64, 66, respectively, for attachment to suitable fluid and/or other devices. The adaptor 62 is shown as connected to one leg 68 of a flow control valve 70 which may, in turn, have another leg 72 receiving a fitting 74 fixed to one end o~ a conduit 76 for a central venous pressure (CVP) measuring device 78. Still another leg 80 of valve 70 may be connected to another fluid source and/or oth2r device (not shown) which may be alternatively communicated with leg 68 and tube 56. As ,~ 10 :
13~23~0 shown, leg 80 is closed off by a cap 82. A control lever 84 of valve 70 is turnable to open and close communication between the valve legs 72, 80 and valve leg 68. In the position shown, valve legs 68 and 72 are connected and CVP
device 78 is operative with other alternatives readily available.
Adaptor 64 is shown connected to one leg 86 of stop cock valve 88. Another leg 90 of valve 88 receives a fitting 92 fixed to conduit 94 connected to an IV bottle or bag 96. A
third leg 98 of valve 88 is shown closed off by a cap 100. A
control knob 102 on valve 88 selectively couples leg 86 with leg 90 or leg 98. In the position shown, legs 86 and 90 are connected so that fluid from the IV bottle or bag is flowing into tube 58.
Finally, adaptor 66 has a flow plug 104 fitted therein to seal off tube 60. However, this plug can be removed and adaptor 66 fitted with a syringe 106 for infusing drugs or baking blood samples as can adaptor 64.
If desired, adaptors 62, 64 and 66 may each be coupled to a ~luid source such as IV bottle or bag 96 so that three fluids may be infused intravenously at the same time at maximal or differing rates of flow.
Lumens 34, 38 and 42 are independent of and noncommunicative with one another so that fluids carried by the lumens will not mix prior to entering into -the bloodstream. In addition, as described, lumens 34, 38 and 42 can be used simultaneously for CVP monitoring, fluid infusion, injection, and/or blood sampling. This independence of lumens .X 11 , . . . .
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allows a patient's CVP to be monitored, and, if desired, hlood samples to be taken, at the same time fluids are being administered, and all of this is achievedi with one vein puncture if a hollow needle or insertion device is used, or one vein exposure and partially transectioned if a hollow needle or insertion device is not used. As shown in Fig. 7, a hollow needle 108, supported at one end by hollow needle hub 110 can be used. The other end of hollow needle 108 is formed with a sharpened and tapered tip 112 for penetrating the skin 30 and a vein 2i9 of a patient.
The present invention is different from the arrangement shown in the Howes '873 patent because the various lumens of the present invention can be interchangeably used in a more reliable manner for the various purposes for which it is designed. For example, the arrangement shown in the Howes '873 patent is disclosed as being able to best monitor CVP
measurement by using the lumen which exits centrally of the catheter tube at the distal tip since that lumen does not contact the vein wall which otherwise might distort pressure readings obtained. With the arrangement of the present invention, the ~luid flow enhancement means reduces the interaction of the vein wall at the lumen distal terminus of both the proximal and middle lumi~ns. This allows more accurate CVP measurement at any of the lumens.
The longitudinal flow direction provided by the flow enhancement means of the present invention also helps prevent damage to the vein wall during infusion processes if an improper pressure differential, flow rate or drug '" '. " ' ' ' ".
13223~
concentration is used.
~ s shown in Figs. 2 through 6, the section of the distal end portion 26 which is below lumen distal terminus 44 has a cross-section of substantially reduced diameter relative to the diameter of tube 22 as seen in Fig. 6. The reduced cross-section as shown in Fig. 5 reduces further to that shown in Fig. 4, and then to that shown in Fig. 3, as the tip of the catheter is approached.
This progressive step-wise pattern of substantially reducing the diameter of the distal end portion 26 and the fluted distal end shape of the present invention differs with respect to the catheter device of the Howes '873 patent where the distal end portion is generally circular in cross-section and has a uniform outer diameter.
It is preferable, although not essential, that the grooves of the ~luid flow enhancement means adjacent to the proximal lumen terminus and the middle lumen terminus extend to the catheter tube distal terminus. As shown in Fig. 2, grooves 52 and 54 extend from proximal lumen terminus 44 and middle lumen terminus 40 to the distal terminus 32 of the catheter tube.
The elongated flexible catheter tube may be formed by processes such as molding or extruding a molten plastic or other synthetic material into the disclosed structure. The lumens may be formed by molding or extruding the catheter tube in one piece as an integral unit or by forming the lumens by using individual tubes, separate ~rom the flexible catheter tub~ and assembling the lumens in the catheter tube.
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The lumen distal termini may be formed by removing a section of the distal end portion of the catheter tube which longitudinally extends substantially from the catheter tube distal terminus to an area longitudinally spaced from the catheter tube distal terminus. This removal step may be accomplished by using a heated die or mold or by cutting away a section of the wall of the catheter tube to expose the wall of a longitudinally freely extending lumen.
The multi-lumen catheter device of the present invention can be seen to have the advantages present in the venous catheter device disclosed in the Howes '873 patent. However, it can also be seen that it is structurally and functionally different and distinguished from the device shown in the Howes '873 patent so that it provides significant and substantial benefits in comparison to the device shown in the Howes '873 patent.
Additional advantages and modifications will readily occur to those skilled in the art. The invention in its broader aspects is, therefore, not limited to the specific ~0 details, representative apparatus and illustrative example shown and described. Accordingly, departures may be made from such details without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.
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BACKGROUND OF THE INVENTION
The invention relates to v~nous catheter devices, and more particularly, to a single catheter device that may be used to infuse multiple fluids, including nourishment and drugs, crystalloids, colloids, and blood and~or blood products, simultaneously into a patient's vein. In addition, the catheter of the present invention may ~e used for central venous pressure (CVP) monitoring and/or removal of blood samples simultaneously with drug and/or fluid infusion. Even more particularly, the present invention relates to multi- ~
lumen venous catheter devices such as those disclosed in U.S. ~-Patent No. Re. 31,873 to Randolph M. Howes.
The Howes '873 patent discloses a multi-lumen venous catheter device having a distal end portion generally circular in cross-section and having a uniform outer diameter. The distal termini of lumens are spaced from each other. One lumen has a distal terminus adjacent the distal terminus of tha catheter tube. The distal termini of the other lumens provide exits at lateral openings in the distal end portion of the catheter tube.
Since the catheter device shown in the Howes '873 patent has multiple lumens which are adapted for multiple and simult~neous operations through use of a single catheter tube, it provides a-substantial advance over conventional venous catheter devices by reducing the number of catheter devices required to be inserted in a patient at a single time when performing multiple functions or procedures. It also prevents X 1 ~
::
~322~10 the drugs and fluids from mixing prior to entering the bloodstream thereby avoiding incompatibility problems. In addit.ion, it minimizes patient discomfort and decreases the possibility of associated complicati.ons suc~h as infection and bleeding.
Even though undesirable mixing is prevented and patient discomfort is minimized by this arrangement of longitudinally spaced lumen termini in a multi-lumen catheter tube with a uniform outer diameter, the fluid flux rate through the lumens is reduced relative to the fluid flux rate of some single lumen catheters previously available.
The catheters shown in the Howes '873 patent also create turbulence and provide sites for blood material such as platelets and red blood cells to accumulate or be deposited and form clots due to thrombus and fibrinogen accumulation.
Accordingly, it is an object of the present invention to provide a multi-lumen venous catheter device having the advantages of the devices disclosed in the Xowes '~73 patent, which permits infusion of a plurality of fluids into a patient's vein simultaneously through a single catheter without mixing the fluids before entering the hloodstream, while improving the fluid flux rate through each lumen and minimizing sites for the accumulation of deposits of materials likely to initiate clot formation.
It is a further object of the present invention to provide a venous catheter devica with multiple lumens which has these advantages and which also allows improved infusion flow rates of liquids into a vein.
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~3223~
It is an additional object to the present invention to provide a venous catheter device with multiple lumens which can be interchangeably used in a more efficient and reliable manner for the various purposes for which it is designed.
It is also an ohject of the present invention to provide a venous catheter device with multiple lumens which is more forgiving during infusion processes in the event an improper pressure differential, flow rate or drug concentration is used.
lQ Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice o-f the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
SUMMARY OF THE INVENTION
To achieve the foregoing objects and in accordance with the purposes of the invention as embodied and broadly described herein, there is provided a venous catheter device comprising: an elongated flexible catheter tube having an outer wall, a proximal end and a longitudinally extending distal end portion with a catheter tube distal terminus for insertion into and capable of being fed longitudinally through a vein; a plurality of independent lumens extending through the catheter tube, each lumen having a lumen distal terminus in the distal end portion, the lumen distal terminus of at least one of the lumens being spaced longitudinally from the .~
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lumen distal terminus of at least one other of said lumens, at least one lumen distal terminus communicating with fluid flow enhancement means provided in the outer wall of said catheter tube; and lumen adaptor means provided at the proximal ends of said lumens for permitting connection of said lumens to independent devices.
It is preferable that at least three independent lumens extend through the catheter tube including a distal lumen, a middle lumen and a proximal lumen; each of the lumens having a wall, a proximal end and a lumen distal terminus adjacent the catheter tube distal terminus; each lumen distal terminus being spaced longitudinally from each other so as to include a distal lumen distal terminus, a middle lumen distal terminus, and a proximal lumen distal terminus, respectively; at least two of the lumen distal termini having fluid flow enhancement means for directing flow through the lumen distal terminus in a direction substantially parallel to the longitudinal direction of the distal end portion~ It is further preferable that the fluid flow enhancement means include a longitudinal groove located in the outer wall of the distal end portion, axially aligned and continuous with a respective lumen.
The catheter of the present invention differs from the design of the catheter described in Howes Patent Re. 31,873 in that instead of having a distal end portion which is generally circular in cross-section and of uniform outer diameter, the present catheter, in its preferred form, has a distal end portion which is of irregular and diminishing cross-section in the area where the lumens terminate.
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~3223~ ~
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are incorporated in and constitute a part o-f the specification, illustrate a presently preferred embodiment of the invention and, together with the general description given above and the detailed description of the preferred embodiment given below, serve to explain the principl s of the invention.
Fig. 1 shows a catheter device constructed in accordance with a preferred form of the invention.
Fig. 2 is an enlarged partial perspective view of the distal tip of the catheter device shown in Fig. 1.
Fig. 3 is a cross section view of the catheter device taken along line 3-3 of Fig. 2.
Fig. 4 is a cross-section view of the catheter device taken along line 4-4 of Fig. 2.
Fig. 5 is a cross-section view of the catheter device taken along line 5-5 of Fig. 2.
Fig. 6 is a cross-section view of the catheter device taken along line 6-6 of Fig. 2.
Fig. 7 is a side elevation view of the catheter shown in Fig. 1, positioned in a vein, with a venipuncture needle withdrawn and protected, and with the catheter connected to a variety of fluid devices.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Reference will now be made in detail to the present preferred embodiment of the invention as illustrated in the accompanying drawlngs~
In accordance with the present invention, the venous ~ 5 . , : , . .
.
. .
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.
., . ~
13~23~0 catheter device includes an elongated flexible catheter tube having an outer wall, a proximal end and a longitudinally extending distal end portion with a catheter tube distal terminus for insertion into and capable of being fed longitudinally through a vein.
As shown in Fiys. 1 and 7, the venous catheter device includes catheter 20. The elongated flexib:Le catheter tube includes elongated flexible tube 22. The proximal end of the catheter tube 22 includes proximal end 24 which is connected to fluid or other devices.
The longitudinally extending distal end portion of catheter tube 22 comprises the distal end portion 26 of catheter tube 22 which is inserted into a vein 28 beneath the s]cin 30 of a patient. As shown in Fig. 7, blood flows through vein 28 in a leftward direction as shown by the arrow. In addition, distal end portion 26 of catheter tube 22 is inserted into and is fed longitudinally through vein 28 in the leftward direction as shown. The distal end portion 26 has a distal terminus 32.
In accordance with the present invention there is provided a plurality of independent lumens extending through the catheter tube~ each lumen having a lumen distal terminus in the distal end portion of the catheter. The lumen distal terminus of at least one of the lumens is spaced longitudinally from the lumen distal terminus of at least one other of said lumens. It is preferable that the plurality of lumens include at least three independent lumens extending through the catheter tube, including a distal lumen, a middle , , :: :,. .
; ,~ , . :. . ~
. . ~ : ; : . :
13223~
lumen and a proximal lumen. Each of the lumens has an inner wall, a proximal end and a lumen distal terminus adjacent to the catheter tube distal terminus. The lumen distal termini are spaced longitudinally from each other so as to include a distal lumen distal terminus, a middle lumen distal terminus, and a proximal lumen distal terminus, respectively.
~ s used herein, "lumen" is intended to mean Eluid conduit means and may include individual tubes, or elongated openings or passages formed in a body, or it may include individual tubes connected to elongated passages in a body. "Independent lumens" is intended to mean lumens which do not communicate flow between each other.
As shown in Figs. 2 and 6, the distal, middle and proximal lumens are so named to indicate the relative positions of their respective termini on catheter tube distal end portion 26. Distal lumen 34 extends from the catheter tube proximal end 24 through the catheter tube to distal end portion 26 where it terminates at the lumen distal terminus 36. Middle lumen 38 extends from the catheter tube proximal end 24 through the catheter tube to middle lumen distal terminus 40. Proximal lumen 42 extends from catheter tube proximal end 24 through the catheter tube to proximal lumen distal terminus 44.
As shown in Figs. 2 and 6, distal lumen 34 has a wall 46, middle lumen 38 has a wall 48, and proximal lumen 42 has a wall 50. Each of the lumen walls 46, 48 and 50, extends longitudinally through catheter tube 22 to form a slender passageway which extends to the respective lumen termini 36, .. .. . . . .
.: - ;
, . .
~32231~
40 and 44 (also seen in Fig. 7).
The lumen termini (exit ports) 36, 40 and 44 are longitudinally spaced from each other by at least about one centimeter and up to about three centimeters or more. Thus, when the catheter is positioned in a vein, two or more fluids, or agents such as dyes or medicines, can be infused simul-taneously into the bloodstream using any of the lumens 34, 38 and 42 without mixing prior to entry into the bloodstream. A
spacing of at least about one centimeter between lumen termini is generally sufficient to prevent any mixing problem.
According to the present invention, at least one lumen distal terminus communicates with unique fluid flow enhancement means provided in the outer wall of the catheter tube. It is preferable that each of the middle and proximal lumen termini have a fluid flow enhancement means for maximizing fluid flux rate through each lumen by directiny flow through the distal terminus in a direction substantially parallel to the longitudinal direction of the distal end portion. It also is preferable that the fluid flow enhancement means include a longitudinal groove located in the outer wall of the distal end portion and axially aligned with a respective lumen. It is further preferable that the groove be an extension of the lumen which runs from ths lumen distal terminus to the distal tip of the catheter. It is, however, not necessary that the groove extend all the way to the catheter tip.
As shown in Fig. 2, the fluid flow enhancement means cooperating with proximal lumen terminus 44 includes ~ 8 '` ' ~, , ~
13223~
longitudinally extending groove 52 which is located in the outer wall of distal end portion 26 and is axially aligned with and a continuation of proximal lumen 42. Longitudinal flow through proxîmal lumen 42 continues in an uninterrupted fashion in the longitudinal direction through proximal lumen terminus 4~ and into groove 52, where mixing with the blood stream occurs.
Similarly, the fluid flow enhancement means cooperating with middle lumen terminus 40 includes longitudlnally extending groove 54 which is located in the outer wall of distal end portion 26 and is axially aligned with and continuous from middle lumen 38. Longitudinal flow through middle lumen 38 continues in an uninterrupted fashion in the longitudinal direction through middle lumen terminus 40 and into groove 54, where mixing with the bloodstream occurs.
The catheter disclosed in Howes Patent Re. 31,873 incorporates lumen exit ports which are spaced from the distal terminus of the catheter tube and which constitute lateral openings in the tube. The distal end portion of the '873 catheter is generally circular in cross-section and has a uniEorm outer diameter. In contrast, provision of fluid flow enhancement means in the catheter of the present invention enables infused fluids to flow through all the lumen distal termini in a direction parallel to the longitudinal direction of the distal end portion. This improved flow pattern is permitted by the irregular and diminishing cross~section of the distal end portion from the point of the proximal lumen terminus to the tip. As a result, the present invention ~ 9 . ., ;, ., : . . : , " ' ' ' '' ~ ~ ~ ' .:
~32~3~ ~
infuses fluids in a different and more efficient manner and with less turbulence at the exit site of the lumen distal termini than the venous catheter device disclosed in the Howes '873 patent.
The improved flow characteristics and reduced turbulence minimize the number of blood or blood component accumulation sites and reduce the risk of clotting. In 1he Howes '873 catheter, the flow through the lumen opening has a substantial component in the lateral direction and a minimum component, if any, in the axial direction because there is a buttress adjacent to the laterally-directed lumen exit ports. In the present device there is a substantial component of axial flow through the lumen openings because of the unique shape of the catheter wall adjacent to the middle and proximal lumen exit ports 40 and 44.
The proximal ends of the lumens are connected to adaptor means for coupling the lumens to independent f]uid and/or other devices. As shown in Fig. 7, a Y connector 61 couples the lumens 34, 38 and 42 with tubes 56, 58 and 63, 20 respectively. Tubes 56, 58 and 60 are provided with adaptors 62, 64, 66, respectively, for attachment to suitable fluid and/or other devices. The adaptor 62 is shown as connected to one leg 68 of a flow control valve 70 which may, in turn, have another leg 72 receiving a fitting 74 fixed to one end o~ a conduit 76 for a central venous pressure (CVP) measuring device 78. Still another leg 80 of valve 70 may be connected to another fluid source and/or oth2r device (not shown) which may be alternatively communicated with leg 68 and tube 56. As ,~ 10 :
13~23~0 shown, leg 80 is closed off by a cap 82. A control lever 84 of valve 70 is turnable to open and close communication between the valve legs 72, 80 and valve leg 68. In the position shown, valve legs 68 and 72 are connected and CVP
device 78 is operative with other alternatives readily available.
Adaptor 64 is shown connected to one leg 86 of stop cock valve 88. Another leg 90 of valve 88 receives a fitting 92 fixed to conduit 94 connected to an IV bottle or bag 96. A
third leg 98 of valve 88 is shown closed off by a cap 100. A
control knob 102 on valve 88 selectively couples leg 86 with leg 90 or leg 98. In the position shown, legs 86 and 90 are connected so that fluid from the IV bottle or bag is flowing into tube 58.
Finally, adaptor 66 has a flow plug 104 fitted therein to seal off tube 60. However, this plug can be removed and adaptor 66 fitted with a syringe 106 for infusing drugs or baking blood samples as can adaptor 64.
If desired, adaptors 62, 64 and 66 may each be coupled to a ~luid source such as IV bottle or bag 96 so that three fluids may be infused intravenously at the same time at maximal or differing rates of flow.
Lumens 34, 38 and 42 are independent of and noncommunicative with one another so that fluids carried by the lumens will not mix prior to entering into -the bloodstream. In addition, as described, lumens 34, 38 and 42 can be used simultaneously for CVP monitoring, fluid infusion, injection, and/or blood sampling. This independence of lumens .X 11 , . . . .
, -,, ~
132231~
allows a patient's CVP to be monitored, and, if desired, hlood samples to be taken, at the same time fluids are being administered, and all of this is achievedi with one vein puncture if a hollow needle or insertion device is used, or one vein exposure and partially transectioned if a hollow needle or insertion device is not used. As shown in Fig. 7, a hollow needle 108, supported at one end by hollow needle hub 110 can be used. The other end of hollow needle 108 is formed with a sharpened and tapered tip 112 for penetrating the skin 30 and a vein 2i9 of a patient.
The present invention is different from the arrangement shown in the Howes '873 patent because the various lumens of the present invention can be interchangeably used in a more reliable manner for the various purposes for which it is designed. For example, the arrangement shown in the Howes '873 patent is disclosed as being able to best monitor CVP
measurement by using the lumen which exits centrally of the catheter tube at the distal tip since that lumen does not contact the vein wall which otherwise might distort pressure readings obtained. With the arrangement of the present invention, the ~luid flow enhancement means reduces the interaction of the vein wall at the lumen distal terminus of both the proximal and middle lumi~ns. This allows more accurate CVP measurement at any of the lumens.
The longitudinal flow direction provided by the flow enhancement means of the present invention also helps prevent damage to the vein wall during infusion processes if an improper pressure differential, flow rate or drug '" '. " ' ' ' ".
13223~
concentration is used.
~ s shown in Figs. 2 through 6, the section of the distal end portion 26 which is below lumen distal terminus 44 has a cross-section of substantially reduced diameter relative to the diameter of tube 22 as seen in Fig. 6. The reduced cross-section as shown in Fig. 5 reduces further to that shown in Fig. 4, and then to that shown in Fig. 3, as the tip of the catheter is approached.
This progressive step-wise pattern of substantially reducing the diameter of the distal end portion 26 and the fluted distal end shape of the present invention differs with respect to the catheter device of the Howes '873 patent where the distal end portion is generally circular in cross-section and has a uniform outer diameter.
It is preferable, although not essential, that the grooves of the ~luid flow enhancement means adjacent to the proximal lumen terminus and the middle lumen terminus extend to the catheter tube distal terminus. As shown in Fig. 2, grooves 52 and 54 extend from proximal lumen terminus 44 and middle lumen terminus 40 to the distal terminus 32 of the catheter tube.
The elongated flexible catheter tube may be formed by processes such as molding or extruding a molten plastic or other synthetic material into the disclosed structure. The lumens may be formed by molding or extruding the catheter tube in one piece as an integral unit or by forming the lumens by using individual tubes, separate ~rom the flexible catheter tub~ and assembling the lumens in the catheter tube.
~: :
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, ~32231~
The lumen distal termini may be formed by removing a section of the distal end portion of the catheter tube which longitudinally extends substantially from the catheter tube distal terminus to an area longitudinally spaced from the catheter tube distal terminus. This removal step may be accomplished by using a heated die or mold or by cutting away a section of the wall of the catheter tube to expose the wall of a longitudinally freely extending lumen.
The multi-lumen catheter device of the present invention can be seen to have the advantages present in the venous catheter device disclosed in the Howes '873 patent. However, it can also be seen that it is structurally and functionally different and distinguished from the device shown in the Howes '873 patent so that it provides significant and substantial benefits in comparison to the device shown in the Howes '873 patent.
Additional advantages and modifications will readily occur to those skilled in the art. The invention in its broader aspects is, therefore, not limited to the specific ~0 details, representative apparatus and illustrative example shown and described. Accordingly, departures may be made from such details without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.
.. . .. ... ..
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Claims (25)
1. A venous catheter device comprising:
an elongated flexible catheter tube having an outer wall, a proximal end and a longitudinally extending distal end portion with a catheter tube distal terminus for insertion into and being capable of being fed longitudinally through a vein; at least three independent lumens extending through said catheter tube including a distal lumen, a middle lumen and a proximal lumen; each of said lumens having a wall, a proximal end and a lumen distal terminus adjacent the catheter tube distal terminus; said lumen distal termini being spaced longitudinally from each other so as to include a distal lumen distal terminus, a middle lumen distal terminus, and a proximal lumen distal terminus, respectively; at least two of said lumen termini having fluid flow enhancement means for directing flow through the lumen distal termini in a direction substantially parallel to the longitudinal direction of said distal end portion, and each of the proximal ends of said lumens including lumen adaptor means for permitting connection to independent fluid devices.
an elongated flexible catheter tube having an outer wall, a proximal end and a longitudinally extending distal end portion with a catheter tube distal terminus for insertion into and being capable of being fed longitudinally through a vein; at least three independent lumens extending through said catheter tube including a distal lumen, a middle lumen and a proximal lumen; each of said lumens having a wall, a proximal end and a lumen distal terminus adjacent the catheter tube distal terminus; said lumen distal termini being spaced longitudinally from each other so as to include a distal lumen distal terminus, a middle lumen distal terminus, and a proximal lumen distal terminus, respectively; at least two of said lumen termini having fluid flow enhancement means for directing flow through the lumen distal termini in a direction substantially parallel to the longitudinal direction of said distal end portion, and each of the proximal ends of said lumens including lumen adaptor means for permitting connection to independent fluid devices.
2. The venous catheter device of claim 1 wherein the fluid flow enhancement means includes a longitudinal groove located in the outer wall of the distal end portion and axially aligned with a respective lumen.
3. The venous catheter device of claim 2 wherein said groove is continuous with said respective lumen.
4. The venous catheter device of claim 2 wherein said groove extends to the catheter tube distal terminus.
5. The venous catheter device of claim 2 wherein the outer wall of the distal end portion adjacent the groove has a substantially reduced diameter relative to the diameter of the outer wall of the distal end portion proximal of the distal terminus of said respective lumen.
6. The venous catheter device of claim 1 wherein the distal terminus of one of said lumens is substantially coextensive with the distal terminus of said catheter tube.
7. The venous catheter device of claim 2 wherein said groove of said fluid flow enhancement means is continuous with a portion of the wall of said proximal lumen.
8. The venous catheter device of claim 2 wherein said groove of said fluid flow enhancement means is continuous with a portion of the wall of said middle lumen.
9. The venous catheter device of claim 1 wherein a first lumen terminus is spaced about one to three centimeters from the catheter tube distal terminus and a second lumen terminus is spaced about one to three centimeters from said first lumen terminus.
10. A venous catheter device comprising:
an elongated flexible catheter tube having an outer wall, a proximal end and a longitudinally extending distal end portion with a catheter tube distal terminus or insertion into and capable of being fed longitudinally through a vein; a plurality of independent lumens extending through said catheter tube, each lumen having a lumen distal terminus in said distal end portion, said lumen distal terminus of at least one of said lumens being spaced longitudinally from the lumen distal terminus of at least one other of said lumens, at least one lumen distal terminus communicating with fluid flow enhancement means provided in the outer wall of said catheter tube; and lumen adaptor means provided at the proximal ends of said lumens for permitting connection of said lumens to independent fluid devices.
an elongated flexible catheter tube having an outer wall, a proximal end and a longitudinally extending distal end portion with a catheter tube distal terminus or insertion into and capable of being fed longitudinally through a vein; a plurality of independent lumens extending through said catheter tube, each lumen having a lumen distal terminus in said distal end portion, said lumen distal terminus of at least one of said lumens being spaced longitudinally from the lumen distal terminus of at least one other of said lumens, at least one lumen distal terminus communicating with fluid flow enhancement means provided in the outer wall of said catheter tube; and lumen adaptor means provided at the proximal ends of said lumens for permitting connection of said lumens to independent fluid devices.
11. The venous catheter device of claim 10 wherein the fluid flow enhancement means includes a longitudinal groove located in the outer wall of the distal end portion and axially aligned with a respective lumen.
12. The venous catheter device of claim 11 wherein the groove is continuous with said respective lumen.
13. The venous catheter device of claim 11 wherein the groove extends to the catheter tube distal terminus.
14. The venous catheter device of claim 11 wherein the outer wall of the distal end portion adjacent the groove has a substantially reduced diameter relative to the diameter of outer wall of the distal end portion proximal of the lumen distal terminus of said respective lumen.
15. The venous catheter device of claim 10 wherein the distal terminus of one of the lumens is substantially coextensive with the distal terminus of the catheter tube.
16. The venous catheter device of claim 11 wherein said groove of the fluid flow enhancement means is continuous with a portion of the wall of said respective lumen.
17. A method of constructing a venous catheter device comprising:
forming an elongated flexible catheter tube having a proximal end and a longitudinally extending distal end portion and distal terminus;
forming at least three independent lumens extending through the catheter tube including a distal lumen with a distal lumen terminus, a middle lumen and a proximal lumen, each having a proximal end; and forming a middle lumen distal terminus longitudinally spaced proximal of the distal lumen terminus in the distal end portion of the catheter tube and having fluid flow enhancement means for directing flow through the distal terminus of the middle lumen in a direction parallel to the longitudinal direction of the distal end portion.
forming an elongated flexible catheter tube having a proximal end and a longitudinally extending distal end portion and distal terminus;
forming at least three independent lumens extending through the catheter tube including a distal lumen with a distal lumen terminus, a middle lumen and a proximal lumen, each having a proximal end; and forming a middle lumen distal terminus longitudinally spaced proximal of the distal lumen terminus in the distal end portion of the catheter tube and having fluid flow enhancement means for directing flow through the distal terminus of the middle lumen in a direction parallel to the longitudinal direction of the distal end portion.
18. A method of constructing a venous catheter device comprising:
forming an elongated flexible catheter tube having a proximal end and a longitudinally extending distal end portion and distal terminus;
forming at least three independent lumens extending through the catheter tube including a distal lumen with a distal lumen terminus, a middle lumen and a proximal lumen, each having a proximal end; and forming a proximal lumen distal terminus longitudinally spaced proximal of the middle lumen terminus in the distal end portion of the catheter tube having fluid flow enhancement means for directing flow through the distal terminus of the proximal lumen in a direction parallel to the longitudinal direction of the distal end portion.
forming an elongated flexible catheter tube having a proximal end and a longitudinally extending distal end portion and distal terminus;
forming at least three independent lumens extending through the catheter tube including a distal lumen with a distal lumen terminus, a middle lumen and a proximal lumen, each having a proximal end; and forming a proximal lumen distal terminus longitudinally spaced proximal of the middle lumen terminus in the distal end portion of the catheter tube having fluid flow enhancement means for directing flow through the distal terminus of the proximal lumen in a direction parallel to the longitudinal direction of the distal end portion.
19. A method of constructing a venous catheter device comprising:
forming an elongated flexible catheter tube having a proximal end and a longitudinally extending distal end portion and distal terminus;
forming at least three independent lumens extending through the catheter tube including a distal lumen with a distal lumen terminus, a middle lumen and a proximal lumen, each having a proximal end;
forming a middle lumen distal terminus longitudinally spaced proximal of the distal lumen terminus in the distal end portion of the catheter tube and having fluid flow enhancement means for directing flow through the distal terminus of the middle lumen in a direction parallel to the longitudinal direction of the distal end portion; and forming a proximal lumen distal terminus longitudinally spaced proximal of the middle lumen terminus in the distal end portion of the catheter tube having fluid flow enhancement means for directing flow through the distal terminus of the proximal lumen in a direction parallel to the longitudinal direction of the distal end portion.
forming an elongated flexible catheter tube having a proximal end and a longitudinally extending distal end portion and distal terminus;
forming at least three independent lumens extending through the catheter tube including a distal lumen with a distal lumen terminus, a middle lumen and a proximal lumen, each having a proximal end;
forming a middle lumen distal terminus longitudinally spaced proximal of the distal lumen terminus in the distal end portion of the catheter tube and having fluid flow enhancement means for directing flow through the distal terminus of the middle lumen in a direction parallel to the longitudinal direction of the distal end portion; and forming a proximal lumen distal terminus longitudinally spaced proximal of the middle lumen terminus in the distal end portion of the catheter tube having fluid flow enhancement means for directing flow through the distal terminus of the proximal lumen in a direction parallel to the longitudinal direction of the distal end portion.
20. The method of claim 17 wherein the step of forming the middle lumen distal terminus includes removing a section of the distal end portion of the catheter tube which longitudinally extends substantially from the catheter tube distal terminus to an area longitudinally spaced from the catheter tube distal terminus.
21. The method of claim 18 wherein the step of forming the proximal lumen distal terminus includes removing a section of the distal end portion of the catheter tube which longitudinally extends substantially from the catheter tube distal terminus to an area longitudinally spaced from the catheter tube distal terminus and the middle lumen distal terminus.
22. The method of claim 19 wherein the step of forming the middle lumen distal terminus includes removing a section of the distal end portion of the catheter tube which longitudinally extends substantially from the catheter tube distal terminus to an area longitudinally spaced from the catheter tube distal terminus constituting the middle lumen distal terminus and wherein the step of forming the proximal lumen distal terminus includes removing a section of the distal end portion of the catheter tube which longitudinally extends substantially from the catheter tube distal terminus to an area longitudinally spaced from the catheter tube distal terminus and the middle lumen distal terminus.
23. The method of claim 19 including providing the proximal end of the lumens with lumen adaptor means for connection to independent fluid devices.
24. A method of constructing a venous catheter device comprising:
forming an elongated flexible catheter tube having a proximal end and a longitudinally extending distal end portion and distal terminus which is capable of being fed longitudinally through a vein;
forming a plurality of independent lumens extending through the catheter tube, each having a proximal end; and forming a plurality of lumen distal termini with at least one lumen distal terminus longitudinally spaced from at least one other lumen distal terminus in the distal end portion of the catheter tube, with at least one lumen distal terminus having fluid flow enhancement means proximal of the distal terminus of the catheter tube for directing flow through the lumen distal terminus in a direction parallel to the longitudinal direction of the distal end portion.
forming an elongated flexible catheter tube having a proximal end and a longitudinally extending distal end portion and distal terminus which is capable of being fed longitudinally through a vein;
forming a plurality of independent lumens extending through the catheter tube, each having a proximal end; and forming a plurality of lumen distal termini with at least one lumen distal terminus longitudinally spaced from at least one other lumen distal terminus in the distal end portion of the catheter tube, with at least one lumen distal terminus having fluid flow enhancement means proximal of the distal terminus of the catheter tube for directing flow through the lumen distal terminus in a direction parallel to the longitudinal direction of the distal end portion.
25. The method of claim 24 wherein the step of forming the distal terminus of at least one lumen includes removing a section of the distal end portion of the catheter tube which longitudinally extends substantially from the catheter tube distal terminus to an area longitudinally spaced from the catheter tube distal terminus constituting the respective lumen terminus.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/063,918 US4894057A (en) | 1987-06-19 | 1987-06-19 | Flow enhanced multi-lumen venous catheter device |
| US063,918 | 1993-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1322310C true CA1322310C (en) | 1993-09-21 |
Family
ID=22052352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000569890A Expired - Fee Related CA1322310C (en) | 1987-06-19 | 1988-06-20 | Flow enhanced multi-lumen venous catheter device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4894057A (en) |
| AU (1) | AU1993188A (en) |
| CA (1) | CA1322310C (en) |
| WO (1) | WO1988010128A1 (en) |
Families Citing this family (97)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1330285C (en) | 1987-12-22 | 1994-06-21 | Geoffrey S. Martin | Triple lumen catheter |
| US5374245A (en) | 1990-01-10 | 1994-12-20 | Mahurkar; Sakharam D. | Reinforced multiple-lumen catheter and apparatus and method for making the same |
| US5221255A (en) | 1990-01-10 | 1993-06-22 | Mahurkar Sakharam D | Reinforced multiple lumen catheter |
| DE4037641C2 (en) * | 1990-11-27 | 1995-06-14 | Haindl Hans | catheter |
| US5167622A (en) * | 1990-12-07 | 1992-12-01 | Smiths Industries Medical Systems, Inc. | Triple conduit suction catheter |
| CA2054961C (en) * | 1990-12-14 | 1997-09-30 | James R. Gross | Multilumen catheter |
| US5167623A (en) * | 1990-12-27 | 1992-12-01 | The Kendall Company | Multilumen catheter |
| CA2038676C (en) * | 1991-03-20 | 1995-12-26 | Geoffrey S. Martin | Infusion catheter |
| WO1993008864A1 (en) * | 1991-11-05 | 1993-05-13 | Myers Gene E | Fluted catheter |
| US5246016A (en) * | 1991-11-08 | 1993-09-21 | Baxter International Inc. | Transport catheter and multiple probe analysis method |
| US5221256A (en) * | 1992-02-10 | 1993-06-22 | Mahurkar Sakharam D | Multiple-lumen catheter |
| US5315995A (en) * | 1992-03-19 | 1994-05-31 | Henry Ford Hospital | Method and apparatus for continuous measurement of central venous oxygen saturation during human cardiopulmonary resuscitation and clinical shock |
| US5551426A (en) * | 1993-07-14 | 1996-09-03 | Hummel; John D. | Intracardiac ablation and mapping catheter |
| US5348536A (en) * | 1993-08-02 | 1994-09-20 | Quinton Instrument Company | Coextruded catheter and method of forming |
| US5403291A (en) * | 1993-08-02 | 1995-04-04 | Quinton Instrument Company | Catheter with elongated side holes |
| US5395316A (en) * | 1993-08-11 | 1995-03-07 | Med-Pro Design, Inc. | Triple lumen catheter |
| US5486159A (en) * | 1993-10-01 | 1996-01-23 | Mahurkar; Sakharam D. | Multiple-lumen catheter |
| US7008395B1 (en) * | 1994-04-04 | 2006-03-07 | Wake Forset University Health Sciences | Multi-lumen catheter system used in a blood treatment process |
| AU2379495A (en) * | 1994-04-04 | 1995-10-23 | Brian W. Loggie | Multi-lumen catheter system |
| US5441481A (en) * | 1994-05-27 | 1995-08-15 | Mishra; Pravin | Microdialysis probes and methods of use |
| JPH10504475A (en) * | 1994-06-21 | 1998-05-06 | メッド−プロ デザイン，インコーポレイテッド | Catheter with integrated rotary valve |
| US5556390A (en) * | 1995-03-07 | 1996-09-17 | Quinton Instrument Company | Catheter with oval or elliptical lumens |
| DE69636325T2 (en) * | 1995-09-21 | 2007-07-26 | Sherwood Services Ag | Cone-shaped reinforced catheter |
| US6991614B2 (en) * | 1995-11-07 | 2006-01-31 | Boston Scientific Scimed, Inc. | Ureteral stent for improved patient comfort |
| US6849069B1 (en) | 1995-11-07 | 2005-02-01 | Boston Scientitfic Corporation | Medical device with tail(s) for assisting flow of urine |
| US6428513B1 (en) | 1995-12-15 | 2002-08-06 | Timothy Alan Abrahamson | Catheter hub anchoring device |
| US6827710B1 (en) | 1996-11-26 | 2004-12-07 | Edwards Lifesciences Corporation | Multiple lumen access device |
| AU733053C (en) | 1998-02-24 | 2001-11-29 | Boston Scientific Limited | High flow rate dialysis catheters and related methods |
| US6689121B1 (en) | 1998-09-24 | 2004-02-10 | C. R. Bard, Inc. | Systems and methods for treating ischemia |
| US6248112B1 (en) | 1998-09-30 | 2001-06-19 | C. R. Bard, Inc. | Implant delivery system |
| US6251079B1 (en) | 1998-09-30 | 2001-06-26 | C. R. Bard, Inc. | Transthoracic drug delivery device |
| US6592559B1 (en) * | 1998-12-09 | 2003-07-15 | Cook Incorporated | Hollow, curved, superlastic medical needle |
| US6332892B1 (en) | 1999-03-02 | 2001-12-25 | Scimed Life Systems, Inc. | Medical device with one or more helical coils |
| US6620170B1 (en) | 1999-04-26 | 2003-09-16 | C. R. Bard, Inc. | Devices and methods for treating ischemia by creating a fibrin plug |
| US6719805B1 (en) * | 1999-06-09 | 2004-04-13 | C. R. Bard, Inc. | Devices and methods for treating tissue |
| US6277082B1 (en) | 1999-07-22 | 2001-08-21 | C. R. Bard, Inc. | Ischemia detection system |
| US6629987B1 (en) * | 1999-07-30 | 2003-10-07 | C. R. Bard, Inc. | Catheter positioning systems |
| US6592544B1 (en) | 1999-11-24 | 2003-07-15 | Edwards Lifesciences Corporation | Vascular access devices having hemostatic safety valve |
| EP1286709B1 (en) * | 2000-05-19 | 2008-04-09 | CONMED Endoscopic Technologies, Inc. | Multi-lumen biliary catheter with angled guidewire exit |
| US7097635B2 (en) | 2001-01-09 | 2006-08-29 | Rex Medical, L.P. | Guidewire retrieval member for catheter insertion |
| US7011645B2 (en) * | 2001-01-09 | 2006-03-14 | Rex Medical, L.P. | Dialysis catheter |
| US6986752B2 (en) | 2001-01-09 | 2006-01-17 | Rex Medical, Lp | Peritoneal dialysis catheter and insertion method |
| US6814718B2 (en) * | 2001-01-09 | 2004-11-09 | Rex Medical, L.P | Dialysis catheter |
| US8323228B2 (en) | 2007-04-12 | 2012-12-04 | Rex Medical L.P. | Dialysis catheter |
| US7077829B2 (en) * | 2001-01-09 | 2006-07-18 | Rex Medical, L.P. | Dialysis catheter |
| WO2002072186A2 (en) * | 2001-03-14 | 2002-09-19 | E.V.R. Endo Vascular Researches Sa | Vascular catheter guide wire carrier |
| US6719804B2 (en) | 2001-04-02 | 2004-04-13 | Scimed Life Systems, Inc. | Medical stent and related methods |
| US7083593B2 (en) * | 2001-04-18 | 2006-08-01 | Advanced Bionics Corporation | Programmable implantable pump with accessory reservoirs and multiple independent lumen catheter |
| US6620202B2 (en) * | 2001-10-16 | 2003-09-16 | Scimed Life Systems, Inc. | Medical stent with variable coil and related methods |
| US6758836B2 (en) * | 2002-02-07 | 2004-07-06 | C. R. Bard, Inc. | Split tip dialysis catheter |
| US6997899B2 (en) * | 2002-12-17 | 2006-02-14 | Boston Scientific Scimed, Inc, | Rapid exchange dilation catheter for non-vascular applications |
| US7393339B2 (en) * | 2003-02-21 | 2008-07-01 | C. R. Bard, Inc. | Multi-lumen catheter with separate distal tips |
| US7776005B2 (en) * | 2003-03-28 | 2010-08-17 | Covidien Ag | Triple lumen catheter with occlusion resistant tip |
| SE522726C2 (en) * | 2003-04-24 | 2004-03-02 | Nordic Medcom Ab | Multilateral type vascular catheter and method of manufacture thereof |
| US20040243095A1 (en) | 2003-05-27 | 2004-12-02 | Shekhar Nimkar | Methods and apparatus for inserting multi-lumen spit-tip catheters into a blood vessel |
| US20050216044A1 (en) * | 2004-03-25 | 2005-09-29 | Hong Mun K | Total occlusion recanalization facilitating device |
| US8992454B2 (en) | 2004-06-09 | 2015-03-31 | Bard Access Systems, Inc. | Splitable tip catheter with bioresorbable adhesive |
| US8323227B2 (en) | 2004-07-02 | 2012-12-04 | C. R. Bard, Inc. | Tip configurations for a multi-lumen catheter |
| JP4592374B2 (en) * | 2004-09-30 | 2010-12-01 | 日本シャーウッド株式会社 | Triple lumen catheter |
| CN101107023B (en) | 2004-11-04 | 2010-06-09 | 科维蒂恩股份公司 | Catheter insertion apparatus |
| DE602006011000D1 (en) | 2005-05-26 | 2010-01-21 | Infusion Systems Llc | IMPLANTABLE INFUSION DEVICE WITH SEVERAL CONTROLLABLE LIQUID OUTPUTS |
| US8002725B2 (en) * | 2005-07-18 | 2011-08-23 | Novostent Corporation | Embolic protection and plaque removal system with closed circuit aspiration and filtering |
| ITMI20062476A1 (en) * | 2006-12-21 | 2008-06-22 | Leonardo Tagliavini | ENDOTRACHEAL DEVICE FOR MECHANICAL VENTILATION |
| US8177753B2 (en) * | 2007-06-01 | 2012-05-15 | Arrow International, Inc. | Catheter insertion assembly |
| US8500939B2 (en) | 2007-10-17 | 2013-08-06 | Bard Access Systems, Inc. | Manufacture of split tip catheters |
| US8066660B2 (en) * | 2007-10-26 | 2011-11-29 | C. R. Bard, Inc. | Split-tip catheter including lateral distal openings |
| US8292841B2 (en) | 2007-10-26 | 2012-10-23 | C. R. Bard, Inc. | Solid-body catheter including lateral distal openings |
| US9579485B2 (en) | 2007-11-01 | 2017-02-28 | C. R. Bard, Inc. | Catheter assembly including a multi-lumen configuration |
| WO2009059220A1 (en) | 2007-11-01 | 2009-05-07 | C.R. Bard, Inc. | Catheter assembly including triple lumen tip |
| US9364634B2 (en) | 2008-04-22 | 2016-06-14 | Becton, Dickinson And Company | Systems and methods for improving catheter hole array efficiency |
| US9399112B2 (en) | 2008-04-22 | 2016-07-26 | Becton, Dickinson And Company | Catheter hole having an inclined trailing edge |
| US8496629B2 (en) | 2008-04-22 | 2013-07-30 | Becton, Dickinson And Company | Catheter hole having a flow breaking feature |
| US20110190778A1 (en) * | 2008-07-28 | 2011-08-04 | Paul Arpasi | Multiple Port Introducer for Thrombolysis |
| US20100152706A1 (en) * | 2008-12-15 | 2010-06-17 | Morris Cassandra E | Atraumatic suction catheter |
| US8603049B2 (en) * | 2008-12-15 | 2013-12-10 | Kimberly-Clark Worldwide, Inc. | Atraumatic suction catheter |
| US8721605B2 (en) | 2009-04-27 | 2014-05-13 | The Alfred E. Mann Foundation For Scientific Research | Implantable infusion devices with palpable landmarks and methods of needle detection |
| CN103949001B (en) * | 2009-06-26 | 2016-08-24 | 泰科保健集团有限合伙公司 | Catheter insertion system |
| US20110004197A1 (en) | 2009-07-02 | 2011-01-06 | Tyco Healthcare Group Lp | Catheter Having an Expandable Lumen and Method of Manufacture |
| US8518013B2 (en) * | 2009-09-24 | 2013-08-27 | Cook Medical Technologies Llc | Multi-lumen catheter with increased flow area |
| CA2715857A1 (en) | 2009-09-30 | 2011-03-30 | Tyco Healthcare Group Lp | Medical catheter having a design providing low recirculation and reversibility |
| BR112012017771B1 (en) * | 2009-12-23 | 2020-07-14 | Alcon Research, Llc | VALVE TROCART CANNULA |
| US8343106B2 (en) * | 2009-12-23 | 2013-01-01 | Alcon Research, Ltd. | Ophthalmic valved trocar vent |
| US8591450B2 (en) | 2010-06-07 | 2013-11-26 | Rex Medical L.P. | Dialysis catheter |
| JP2012065861A (en) | 2010-09-24 | 2012-04-05 | Nihon Covidien Kk | Dialysis catheter |
| US9402975B2 (en) * | 2011-08-31 | 2016-08-02 | Becton, Dickinson And Company | Systems and methods to increase rigidity and snag-resistance of catheter tip |
| US9072867B2 (en) | 2011-09-30 | 2015-07-07 | Covidien Lp | Catheter with external flow channel |
| US8747343B2 (en) | 2011-09-30 | 2014-06-10 | Covidien Lp | Hemodialysis catheter with improved side opening design |
| US9155862B2 (en) | 2012-09-28 | 2015-10-13 | Covidien Lp | Symmetrical tip acute catheter |
| USD748252S1 (en) | 2013-02-08 | 2016-01-26 | C. R. Bard, Inc. | Multi-lumen catheter tip |
| US10667735B2 (en) * | 2013-09-25 | 2020-06-02 | Kci Licensing, Inc. | Apparatuses and methods for inline collection of a fluid specimen |
| WO2015047831A1 (en) | 2013-09-25 | 2015-04-02 | Kci Licensing, Inc. | Apparatuses & methods for inline collection of a fluid specimen |
| EP4101492A1 (en) | 2013-12-20 | 2022-12-14 | Coloplast A/S | An intermittent urinary catheter |
| US20150196361A1 (en) | 2014-01-14 | 2015-07-16 | Lumenis Ltd. | Apparatus and method for fragmenting and aspirating materials from a body lumen |
| US9855402B2 (en) | 2014-02-15 | 2018-01-02 | Rex Medical, L.P. | Apparatus for delivering fluid to treat renal hypertension |
| US10258768B2 (en) | 2014-07-14 | 2019-04-16 | C. R. Bard, Inc. | Apparatuses, systems, and methods for inserting catheters having enhanced stiffening and guiding features |
| BR112017003362A2 (en) * | 2014-08-21 | 2018-07-03 | D William V Harrity M | medical device for automated control of blood pressure within a specified range and or with a specific target pressure and its use |
| US10610668B2 (en) | 2016-10-05 | 2020-04-07 | Becton, Dickinson And Company | Catheter with an asymmetric tip |
Family Cites Families (40)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US550238A (en) * | 1895-11-26 | Horace russel allen | ||
| US31873A (en) * | 1861-01-01 | 1861-04-02 | James A Cramer | Box for carriage hubs |
| US1696018A (en) * | 1926-07-10 | 1928-12-18 | Schellberg Oscar Boto | Colonic theraphy apparatus |
| US2286462A (en) * | 1940-05-06 | 1942-06-16 | Rafe C Chaffin | Surgical suction drainage and irrigation tube |
| US2845930A (en) * | 1954-09-07 | 1958-08-05 | Brown John William | Means for determining patency in the uterus of cows and similar animals |
| US2954982A (en) * | 1957-06-07 | 1960-10-04 | Fox River Tractor Company | Sand and chip spreaders |
| US3046988A (en) * | 1958-12-01 | 1962-07-31 | Davol Rubber Co | Esophageal nasogastric tube |
| US3055361A (en) * | 1960-04-22 | 1962-09-25 | Deseret Pharmaceutical Company | Intravenous catheters |
| US3144868A (en) * | 1960-10-21 | 1964-08-18 | Mario E Jascalevich | Drainage and feeding cannulae |
| US3370587A (en) * | 1962-07-17 | 1968-02-27 | Fernando R. Vizcarra | Method of introducing a catheter into a body vessel |
| US3359974A (en) * | 1963-10-07 | 1967-12-26 | Hassan H Khalil | Device for the thermal determination of cardiac volumetric performance |
| US3435819A (en) * | 1966-05-17 | 1969-04-01 | Voys Inc Le | Venous pressure monitoring apparatus |
| US3437088A (en) * | 1966-12-01 | 1969-04-08 | Leonard J Bielinski | Apparatus for measuring motility of body organs |
| US3566874A (en) * | 1968-08-13 | 1971-03-02 | Nat Patent Dev Corp | Catheter |
| FR2045206A5 (en) * | 1969-06-20 | 1971-02-26 | Anvar | |
| US3583404A (en) * | 1969-06-23 | 1971-06-08 | Kendall & Co | Nonblocking catheter |
| US3626471A (en) * | 1969-10-13 | 1971-12-07 | Robert E Florin | Illuminated suction brain retractor |
| US3640269A (en) * | 1969-10-24 | 1972-02-08 | Jose M R Delgado | Fluid-conducting instrument insertable in living organisms |
| US3788326A (en) * | 1970-07-29 | 1974-01-29 | H Jacobs | Distally perforated catheter for use in ventilating system |
| US3695921A (en) * | 1970-09-09 | 1972-10-03 | Nat Patent Dev Corp | Method of coating a catheter |
| US3710781A (en) * | 1970-10-12 | 1973-01-16 | T Huthcins | Catheter tip pressure transducer |
| US3805794A (en) * | 1971-03-01 | 1974-04-23 | R Schlesinger | Antegrade-retrograde retention catheter |
| US3726281A (en) * | 1971-12-08 | 1973-04-10 | Bard Inc C R | Self-lubricating catheter |
| US3815608A (en) * | 1972-03-10 | 1974-06-11 | East West Med Prod | Retaining catheter |
| US3885567A (en) * | 1973-02-20 | 1975-05-27 | John R Ross | Gastrointestinal aspirator pump |
| US3867945A (en) * | 1973-05-14 | 1975-02-25 | Wendell M Long | Catheter stylets |
| US3995623A (en) * | 1974-12-23 | 1976-12-07 | American Hospital Supply Corporation | Multipurpose flow-directed catheter |
| US3963028A (en) * | 1975-02-06 | 1976-06-15 | Texas Medical Products, Inc. | Suction wand |
| US4057065A (en) * | 1976-06-21 | 1977-11-08 | Dow Corning Corporation | Percutaneous gastrointestinal tube |
| US4100246A (en) * | 1976-06-21 | 1978-07-11 | Dow Corning Corporation | Method of forming a gastrointestinal tube |
| US4106509A (en) * | 1976-08-05 | 1978-08-15 | The Kendall Company | Catheters |
| USRE31873F1 (en) | 1976-09-08 | 1988-11-15 | Venous catheter device | |
| US4406656A (en) * | 1981-06-01 | 1983-09-27 | Brack Gillium Hattler | Venous catheter having collapsible multi-lumens |
| FR2513520A1 (en) * | 1981-09-25 | 1983-04-01 | Plowiecki Leopold | Multi:passage catheter for introduction of different solns. - has outer sleeve contg. several tubes with outwardly extended inlets |
| US4405313A (en) * | 1982-01-29 | 1983-09-20 | Sisley James R | Figure-eight, dual-lumen catheter and method of using |
| US4568329A (en) * | 1982-03-08 | 1986-02-04 | Mahurkar Sakharam D | Double lumen catheter |
| US4583968A (en) * | 1983-10-03 | 1986-04-22 | Mahurkar Sakharam D | Smooth bore double lumen catheter |
| US4543087A (en) * | 1983-11-14 | 1985-09-24 | Quinton Instrument Company | Double lumen catheter tip |
| US4643711A (en) * | 1984-05-25 | 1987-02-17 | Cook, Inc. | Two lumen hemodialysis catheter |
| US4601701A (en) * | 1985-02-25 | 1986-07-22 | Argon Medical Corp. | Multi-purpose multi-lumen catheter |
-
1987
- 1987-06-19 US US07/063,918 patent/US4894057A/en not_active Expired - Lifetime
-
1988
- 1988-06-20 CA CA000569890A patent/CA1322310C/en not_active Expired - Fee Related
- 1988-06-20 AU AU19931/88A patent/AU1993188A/en not_active Abandoned
- 1988-06-20 WO PCT/US1988/002039 patent/WO1988010128A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US4894057A (en) | 1990-01-16 |
| WO1988010128A1 (en) | 1988-12-29 |
| AU1993188A (en) | 1989-01-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |