CA1327500C - Over the needle catheter introducer - Google Patents
Over the needle catheter introducerInfo
- Publication number
- CA1327500C CA1327500C CA000613477A CA613477A CA1327500C CA 1327500 C CA1327500 C CA 1327500C CA 000613477 A CA000613477 A CA 000613477A CA 613477 A CA613477 A CA 613477A CA 1327500 C CA1327500 C CA 1327500C
- Authority
- CA
- Canada
- Prior art keywords
- needle
- cannula
- introducer
- hub
- finger
- 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
Links
- 210000004204 blood vessel Anatomy 0.000 description 31
- 238000000034 method Methods 0.000 description 13
- 238000003780 insertion Methods 0.000 description 11
- 230000037431 insertion Effects 0.000 description 11
- 210000001367 artery Anatomy 0.000 description 4
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 239000008280 blood Substances 0.000 description 3
- 210000004369 blood Anatomy 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 206010018852 Haematoma Diseases 0.000 description 2
- 208000007536 Thrombosis Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- DNXHEGUUPJUMQT-UHFFFAOYSA-N (+)-estrone Natural products OC1=CC=C2C3CCC(C)(C(CC4)=O)C4C3CCC2=C1 DNXHEGUUPJUMQT-UHFFFAOYSA-N 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 210000000709 aorta Anatomy 0.000 description 1
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
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0606—"Over-the-needle" catheter assemblies, e.g. I.V. catheters
Abstract
Abstract of the Disclosure An over the needle catheter introducer having an introducer needle and a cannula member with finger engaging means on the introducer needle and cannula member and a groove means on the introducer means to selectively engage a luer extension on the proximal end of the cannula member so that the introducer needle engages the cannula member in one position and is readily released therefrom by rotation of the cannula member about the introducer needle.
Description
The present invention relates generally to catheter assemblies and more particularly ~o over the needle catheter introducers for use in placing a catheter into a patient's blood vesseln Several techniques have bPen develop2d for the insertion o~ a catheter into a patient'~ blood vessel. On such technique is known as the Seldinger technique. The Seldinger technigue involves the use of a needle which is initially advanced into an artery at a preferred angle of approximately ~0 30 to 45 degrees. The puncture of the artery is con~irmed bythe presence of blood in the needle. Next a flexible J-spring guidewire is inserted through the needle for approximately 15 to 20 cm. The needle îs then withdrawn over the guidewire while pressure iæ applied to the artery to prevent the formation of a hematoma at the incision site.
The guidewire is then cleaned with sterile salins and a multipurpose catheter is inserted over the guidewire until the catheter reaches the desired initial location. The guidewire is then removed from the inside of the catheter and the catheter is flushed to remove any thrombus material which may have been picked up as the catheter was inserted into the artery over the guidewire. Finally, the catheter is advanced to a final location such as in the ascending aorta.
In another catheter insertion technique, an introducer needle is ins~rted through a flexible cannula so that the needle point extends beyond the distal end of the cannula and so that the hub of the introducer needle engages the hub of the cannula. In this ~echnique, the introducer needle and ; cannula are advanced through the skin of the patient so 3~
, X 1 ~ t " ' ': ~'' , ' ' , that the be~el on the distal end of the introducer needle pierces the patient's blood vessel at an angle of approximately 30 to 4~ degrees. Once the introducer needle pierces the patient 1 5 blood vessel, the introducer needle is withdrawn and the cannula is advanced into the patient's blood vessel. Next, a flexible guidewire is inserted into the patient's blood vessel through the cannula. The cannula is then removed and a catheter is inserted into the patient's blood vessel over the guidewire. Finally, the guidewire is removed and the catheter is flushed to remove any thrombus material from the catheter.
Normally, during this procedure, $he nurse must initially determine that the patient's blood vessel has been properly pierced and then while pressing on the patient's blood vessel to prevent the formation of a hematoma at the incision site, the nurse must single handedly separate the needle hub from the hub. During the insertion and removal of the introducer needle Prom the patient's blood vessel, it is very important that the nurse is aware of the orientation of the bevel on the distal end of the introducer needle to ensure that the blood vessel is not pierced again or that the cannula itself is not pierced if the needle hub and cannula hub are inadvertently separated during the insertion procedure. Additionally, by placing the projection on the proximal end of the cannula membsr, it is often times difficult to secure the cannula member to the skin of the patient if the nurse desires to insert the catheter at a later time.
A number of prior assemblies are known to facilitate the separation of the needle hub from the cannula hub These prior assemblies typically include the use of a projection extending from the proximal end of the cannula hub. The projection on the cannula hub facilitates the separation of the needle hub from the cannula hub by providing a surface on the cannula hub which may be pressed against while the needle hub is firmly held by the nurse.
Althouyh this projection makes the single handed separation of the needle hub from the cannula hub easier, it may also cause the needle hub to be inadvertently separated from the cannula hub during the insertion procedure.
Many of the prior assemblies use ~ friction fit between the interior of the cannula hub and the exterior of the needle hub as the primary method of retaining the needle hub in the cannula hub. When the needle hub is separated from the cannula hub to remove the introducer needle from the patient's blood vessel, the cannula hub is often rotated to release the frictional fit between the needle hub and th~
cannula hub. During this procedure, it is important that the bevel on the distal end of the introducer needle remain oriented in thP same position as when the blood vessel was initially pierced so that the blood vessel is not piercsd a second time by movement of the introducer needle in the patient's blood vessel as the needle hub and cannula hub are separated. There~ore, although it is important to hav~ a secure connection between the needle hub and the cannula hub during the insertion procedure, it is equally important that the needle hub and cannula hub are readily separable when the introducer needle is to be removed ~rom the patient's blood vessel~ None of the presently available devices meet this requiremen~.
It i5 apparent that a need remains in the art ~or an over the needle catheter introducer which will secure the needle hub to the cannula hub while the assembly is introduced into the patient's blood vessel and will readily release the cannula hub from the needle hub whan the introducer needle is removed from the patient's blood vessel.
A feature o~ the present invention is to provide a pair of luPr type extensions on the proximal ~nd of the cannula hub to facilitate the locking and release of the cannula hub rom the needle hub.
Another feature of the present invention is the pro~i~ion of a distally projecting locking groove on the distal ~ide o~ a finger member on the needle hub to xeleasably engage a luer extension on the cannula hub.
A further feature of the present inYention is the provision o~ a radially extending finger member on the cannula hub to facilitate the single handed ~eparation of the needl~ hub ~rom the cannula hub.
The prese.nt invention represents an improvement over the priox art by providing an introducer consi~ting o~ a needle hub and cannula hub which are readily locked during insertion of the assembly into the patienk'~ blood ve~sel and which are readily separable to allow for the convenient removal of the introducer needle from the patient's blood vessel.
Additionally, the finger member on t]he naedle hub provides the nurse with an indicator of the o:rientation of the bevel~d distal end of the introducer needle within the patient'~
blood vessel.
In the preferred embodiment, the introducer consists of an introducer needle and a cannula membPr. The introducer needle consists of an elongate hollow needle having a be~eled distal end and a needle hub on the proximal end thereof. The needle hub includes an axial bore extending therethrough, an outwardly extending finger member on the distal end thereof and a pair of grippin~ memb~rs Pxtending lengthwise along the sides of the n~edle hub. The distal side of the finger member includes a distally extending groove member positioned a~ove the reduced diameter bore extension of the needle hub to contact and engaye the luer type extensions on the proximal end of the cannula hub.
~ 4 The cannula member consists of an elongate flexible tubular member which is sized to slidingly fit over th~
introducer needle. The tubular member extends along the introducer needle to a location just proximal to the beveled distal end of the needle. The proximal end of the cannula member includes a cannula hub having an axial bore extending therethrough, a finger mamber and a pair of luer type extensions thereon. The finger member extends radially from the cannula hub at a position ælightly proximal to the distal end of the cannula hub and is oriented in longitudinal alig~ment with the finger member sn the needle hub in the locked position of the introducer. The luer type extensions are radially positioned on the distal end of the cannula hub to releasably c~ntact the groove member on the needle hub.
An advantage of the present invention is that the needle hub and cannula hub are securely locked together during the insertion of the present invention i.nto the patient's blood vessel.
Another advantage of the present invention is that the needle hub ~nd cannula hub are readily separable to ~acilitate the removal of the introducer from the patient's blood vessel.
Further fe~tures and advantages of the presen~ invention will become apparent from the following detailed description of the present invention which describes the preferred forms of the present invention.
Fig. 1 is an exploded perspective view of the present invention;
Fig. 2 is a side view of the present invention;
X
Fig. 3 is a top of the present invention;
Fig. 4 is a frontal view of the introducer needle of the present invention;
Fig. 5 is a rear view o~ the introducer needle of the present invention;
Fig. 6 is a frontal view o~ an alternate Pmbodiment the introducer needle of the present invention; and Fig. 7 is a cross-sectional view of the introducer needle illustrat~d in Fig. 6.
In the preferred embodiment, the present invention is intended to be used as a conventional over the needle catheter introducer; however, it is readily anticipated that the present invention may also be used as a dilator to facilitate the insertion of larger diameter cath~ters into a patient~ blood vessel.
In describing the present invention, the term "distal end" re~ers to the end of a part closest to the beveled needle ~oint of the introducer. The term "proximal end" of a part refers to the end of a part furthest from the beveled needle point of the introducer.
The present invention i~ directed to an improved ovex the needle catheter introducer which is referred to herein generally as introducer 10. The introducer 10 ronsists of an introducer needle 12 and a cannula member 14.
The introducer needle 12 includes an elongate hollow m~tal needle s~ction 16 and a needle hub 18. The distal end of ~he needle section 16 includes a beveled needle point 20 which is particularly oriented with a finger member 32 on the needle hub 18 so that the nurse can readily determine the orientation of the beveled needle point 20 at all times during the procedure.
The needle hub 18 is preferably an elongate plastic member which is rigidly attached to the proximal end of the needle section 16 and includes an axial bore 22 extending therethrough. The axial bore 22 includes an enlarged diameter proximal end which tapers to a smaller diameter area near the distal end of the needle hub 18 and then passes through the interior of the needl4 section 16. The proximal end of the needle hub 18 includes a pair of luer extensions 24 thereon which preferably have a luer lock angle of approximately 6 degrees so that nearly any other standard member may readily be attached thereto or so that the end cap 26 may be retained in the axial bore 22. A pair of grooved gripping members 28 and 30 are located longitudinally along the sides of the needle hub 18 to provide a convenient surface ~or the nurse to securely grasp the needle hub 18 during the insertion procedure.
A finger member 32 extends outwardly from the distal end of the needle hub 18. The finger member 32 is aligned with the b~veled needle point 20 on the opposite longitudinal side of the needle section 16 to provide a readily observable indication of the relative orientation of the beveled needle point 20 in the patient's blood vessel.
The distal side of the finger me!mber 32 includes a distally extending groove member 34 which extends perpendicularly from the finger member 32~ The groove member 34 includes a distal locking ridge 36 oriented parallel to and spaced apart from the finger member 32 and a perpendicular retaining ridge 38 along one side of the groove member 34.
The locking member 36 and retaining ridge 38 create a gxooved area on the bottom surface of the groove member 34 adjacent to the finger member to selectively retain one of the angled luer extensions 40 from the distal end of the cannula member ~4 therein. A tapered bore extension 42 is positioned below the groove member 34 and extends distally from the distal end of the needle hub 18 to contact the interior surface of the axial bore 44 of the cannula member 14.
The cannula member ~4 includes an elongate tubular member 46 which has an inner diameter substantially similar to the outer diameter of the needle section 16 and a cannula hub 50 with an axial bore 44 therethrough. The axial bore 44 of the cannula member 14 includes an enlarged diameter proximal end which tapers to a smaller diameter area near the distal end of the cannula hub 50 similar to the outside taper of the bore extension 42. The axial bore 44 continues from the distal end of the cannula hub 50 through the tubular member 46 and reduced diameter portion 48. The distal end of the tubular member 46 includes a tapered reduced diameter portion 48 which is positioned distally of the heveled needle point 20 in the locked position of the introducer 10~ The proximal end of the cannula hub 50 includes a pair of luer extensions 40 which pre~erably have a luer lock angle of approximately 6 degrees. The finger member 52 is preferably located near the distal end of cannula hub 50 and extends radially from the cannula hub 50 in longitudinal alignment with the finger member 32 of the needle hub 18 when the introducer 10 i5 in the locked position. The location of the finger member 32 near the distal end of the cannula hub 50 allows the nurse a sufficient area on the proximal end of the cannula hub 50 to tape the proximal end of the cannula hub 50 to the skin of the patient i~ the catheter is to be inserted at a later time.
When the introducer 10 is assembled for insertion into the patient's blood vessel, the needle section 16 of the ; introducer needle 12 extends through the tubular member 46 of the cannula member 14 and the beveled needle point 20 of the needle section 16 extends distally a short distance beyond the reduced diameter portion 48 o~ the tubular member 46. The bore extension 42 on the distal end of the needle hub 18 extends into and sealingly contacts the inner surface o~ the axial bore 44 of the cannula member 14. One of the luer extensions 40 on the proximal end of the cannula member 14 is retained in the groove area formed by the finger member 32, the locking ridge 36 and the retaining ridge 38 so that the finger member 32 and locking ridge 36 prevent longitudinal movement of the luer extension 40 therein and the retaining ridge 38 prevents counterclockwise movement of the luer extension 40 therein. Tharefore, once the introducer 10 has pierced the patient's blood vessel, the nurse may rotate the finger member 52 on the cannula member 14 clockwise to release the intrsducer needle 12 from the cannula member 14 so that the introducer needle 12 may then be withdrawn from the patient's blood vessel.
In the alternate embodiment illustrated in Figs. 6 and 7, like numbers have been applied to like elements in order to illustrate the common elements of the respective embodiments. In this alternate embodiment, the distal side of the finger member 32 on the needle hub 18 includes a distally extending groove member 34 which extends substantially parallel to the bore extension 42 and axial bore 22. The bottom surface of the groove member 34 in this emhodiment includes a locking ridge 36 which is parallel to and spaced apart from the finger member 32. A pair of lateral retaining lips 54 are oriented perpendicular to the finger member 32 and locking ridge 36 along the sides of the bottom surface of the groove member 34. ~s with the previous embodiment, the finger mamber 32 and the locking ridge 36 prevent longitudinal movement of the luer extension 40 in the groove area. The retaining lips 54 o~ this embodiment resist lateral movement of the luer extension 40 in the groove area but will allow the luer extension 40 to leave the groove area i* the finger member 52 on the cannula member 14 is rotated while the finger member 32 on the introducer needle is held in position. Therefore, once the introducer 10 of this embodiment has pierced the patient's blood vessel, the nurse may rotate the finger member 52 clockwise or counterclockwise with respect to the finger member 32 so that the luer extensisn 40 passes over the retaining lip 54 and the introducer needle 12 may then be removed from the patient's blood vessel.
Next, in the preferred procedure as described above, the cannula member 14 is advanced into the patient's blood vessel and a standard guidewire (not shown) is inserted through the axial bore 44 of the cannula member 14 and into the patient's blood vessel. The cannula member 14 is then removed and a catheter (not shown) may be passed over the guidewire and advanced to the desired location in the patient's blood vessel. Finally, the guid~wire is removed from inside the catheter and the catheter is flushed prior to use.
The guidewire is then cleaned with sterile salins and a multipurpose catheter is inserted over the guidewire until the catheter reaches the desired initial location. The guidewire is then removed from the inside of the catheter and the catheter is flushed to remove any thrombus material which may have been picked up as the catheter was inserted into the artery over the guidewire. Finally, the catheter is advanced to a final location such as in the ascending aorta.
In another catheter insertion technique, an introducer needle is ins~rted through a flexible cannula so that the needle point extends beyond the distal end of the cannula and so that the hub of the introducer needle engages the hub of the cannula. In this ~echnique, the introducer needle and ; cannula are advanced through the skin of the patient so 3~
, X 1 ~ t " ' ': ~'' , ' ' , that the be~el on the distal end of the introducer needle pierces the patient's blood vessel at an angle of approximately 30 to 4~ degrees. Once the introducer needle pierces the patient 1 5 blood vessel, the introducer needle is withdrawn and the cannula is advanced into the patient's blood vessel. Next, a flexible guidewire is inserted into the patient's blood vessel through the cannula. The cannula is then removed and a catheter is inserted into the patient's blood vessel over the guidewire. Finally, the guidewire is removed and the catheter is flushed to remove any thrombus material from the catheter.
Normally, during this procedure, $he nurse must initially determine that the patient's blood vessel has been properly pierced and then while pressing on the patient's blood vessel to prevent the formation of a hematoma at the incision site, the nurse must single handedly separate the needle hub from the hub. During the insertion and removal of the introducer needle Prom the patient's blood vessel, it is very important that the nurse is aware of the orientation of the bevel on the distal end of the introducer needle to ensure that the blood vessel is not pierced again or that the cannula itself is not pierced if the needle hub and cannula hub are inadvertently separated during the insertion procedure. Additionally, by placing the projection on the proximal end of the cannula membsr, it is often times difficult to secure the cannula member to the skin of the patient if the nurse desires to insert the catheter at a later time.
A number of prior assemblies are known to facilitate the separation of the needle hub from the cannula hub These prior assemblies typically include the use of a projection extending from the proximal end of the cannula hub. The projection on the cannula hub facilitates the separation of the needle hub from the cannula hub by providing a surface on the cannula hub which may be pressed against while the needle hub is firmly held by the nurse.
Althouyh this projection makes the single handed separation of the needle hub from the cannula hub easier, it may also cause the needle hub to be inadvertently separated from the cannula hub during the insertion procedure.
Many of the prior assemblies use ~ friction fit between the interior of the cannula hub and the exterior of the needle hub as the primary method of retaining the needle hub in the cannula hub. When the needle hub is separated from the cannula hub to remove the introducer needle from the patient's blood vessel, the cannula hub is often rotated to release the frictional fit between the needle hub and th~
cannula hub. During this procedure, it is important that the bevel on the distal end of the introducer needle remain oriented in thP same position as when the blood vessel was initially pierced so that the blood vessel is not piercsd a second time by movement of the introducer needle in the patient's blood vessel as the needle hub and cannula hub are separated. There~ore, although it is important to hav~ a secure connection between the needle hub and the cannula hub during the insertion procedure, it is equally important that the needle hub and cannula hub are readily separable when the introducer needle is to be removed ~rom the patient's blood vessel~ None of the presently available devices meet this requiremen~.
It i5 apparent that a need remains in the art ~or an over the needle catheter introducer which will secure the needle hub to the cannula hub while the assembly is introduced into the patient's blood vessel and will readily release the cannula hub from the needle hub whan the introducer needle is removed from the patient's blood vessel.
A feature o~ the present invention is to provide a pair of luPr type extensions on the proximal ~nd of the cannula hub to facilitate the locking and release of the cannula hub rom the needle hub.
Another feature of the present invention is the pro~i~ion of a distally projecting locking groove on the distal ~ide o~ a finger member on the needle hub to xeleasably engage a luer extension on the cannula hub.
A further feature of the present inYention is the provision o~ a radially extending finger member on the cannula hub to facilitate the single handed ~eparation of the needl~ hub ~rom the cannula hub.
The prese.nt invention represents an improvement over the priox art by providing an introducer consi~ting o~ a needle hub and cannula hub which are readily locked during insertion of the assembly into the patienk'~ blood ve~sel and which are readily separable to allow for the convenient removal of the introducer needle from the patient's blood vessel.
Additionally, the finger member on t]he naedle hub provides the nurse with an indicator of the o:rientation of the bevel~d distal end of the introducer needle within the patient'~
blood vessel.
In the preferred embodiment, the introducer consists of an introducer needle and a cannula membPr. The introducer needle consists of an elongate hollow needle having a be~eled distal end and a needle hub on the proximal end thereof. The needle hub includes an axial bore extending therethrough, an outwardly extending finger member on the distal end thereof and a pair of grippin~ memb~rs Pxtending lengthwise along the sides of the n~edle hub. The distal side of the finger member includes a distally extending groove member positioned a~ove the reduced diameter bore extension of the needle hub to contact and engaye the luer type extensions on the proximal end of the cannula hub.
~ 4 The cannula member consists of an elongate flexible tubular member which is sized to slidingly fit over th~
introducer needle. The tubular member extends along the introducer needle to a location just proximal to the beveled distal end of the needle. The proximal end of the cannula member includes a cannula hub having an axial bore extending therethrough, a finger mamber and a pair of luer type extensions thereon. The finger member extends radially from the cannula hub at a position ælightly proximal to the distal end of the cannula hub and is oriented in longitudinal alig~ment with the finger member sn the needle hub in the locked position of the introducer. The luer type extensions are radially positioned on the distal end of the cannula hub to releasably c~ntact the groove member on the needle hub.
An advantage of the present invention is that the needle hub and cannula hub are securely locked together during the insertion of the present invention i.nto the patient's blood vessel.
Another advantage of the present invention is that the needle hub ~nd cannula hub are readily separable to ~acilitate the removal of the introducer from the patient's blood vessel.
Further fe~tures and advantages of the presen~ invention will become apparent from the following detailed description of the present invention which describes the preferred forms of the present invention.
Fig. 1 is an exploded perspective view of the present invention;
Fig. 2 is a side view of the present invention;
X
Fig. 3 is a top of the present invention;
Fig. 4 is a frontal view of the introducer needle of the present invention;
Fig. 5 is a rear view o~ the introducer needle of the present invention;
Fig. 6 is a frontal view o~ an alternate Pmbodiment the introducer needle of the present invention; and Fig. 7 is a cross-sectional view of the introducer needle illustrat~d in Fig. 6.
In the preferred embodiment, the present invention is intended to be used as a conventional over the needle catheter introducer; however, it is readily anticipated that the present invention may also be used as a dilator to facilitate the insertion of larger diameter cath~ters into a patient~ blood vessel.
In describing the present invention, the term "distal end" re~ers to the end of a part closest to the beveled needle ~oint of the introducer. The term "proximal end" of a part refers to the end of a part furthest from the beveled needle point of the introducer.
The present invention i~ directed to an improved ovex the needle catheter introducer which is referred to herein generally as introducer 10. The introducer 10 ronsists of an introducer needle 12 and a cannula member 14.
The introducer needle 12 includes an elongate hollow m~tal needle s~ction 16 and a needle hub 18. The distal end of ~he needle section 16 includes a beveled needle point 20 which is particularly oriented with a finger member 32 on the needle hub 18 so that the nurse can readily determine the orientation of the beveled needle point 20 at all times during the procedure.
The needle hub 18 is preferably an elongate plastic member which is rigidly attached to the proximal end of the needle section 16 and includes an axial bore 22 extending therethrough. The axial bore 22 includes an enlarged diameter proximal end which tapers to a smaller diameter area near the distal end of the needle hub 18 and then passes through the interior of the needl4 section 16. The proximal end of the needle hub 18 includes a pair of luer extensions 24 thereon which preferably have a luer lock angle of approximately 6 degrees so that nearly any other standard member may readily be attached thereto or so that the end cap 26 may be retained in the axial bore 22. A pair of grooved gripping members 28 and 30 are located longitudinally along the sides of the needle hub 18 to provide a convenient surface ~or the nurse to securely grasp the needle hub 18 during the insertion procedure.
A finger member 32 extends outwardly from the distal end of the needle hub 18. The finger member 32 is aligned with the b~veled needle point 20 on the opposite longitudinal side of the needle section 16 to provide a readily observable indication of the relative orientation of the beveled needle point 20 in the patient's blood vessel.
The distal side of the finger me!mber 32 includes a distally extending groove member 34 which extends perpendicularly from the finger member 32~ The groove member 34 includes a distal locking ridge 36 oriented parallel to and spaced apart from the finger member 32 and a perpendicular retaining ridge 38 along one side of the groove member 34.
The locking member 36 and retaining ridge 38 create a gxooved area on the bottom surface of the groove member 34 adjacent to the finger member to selectively retain one of the angled luer extensions 40 from the distal end of the cannula member ~4 therein. A tapered bore extension 42 is positioned below the groove member 34 and extends distally from the distal end of the needle hub 18 to contact the interior surface of the axial bore 44 of the cannula member 14.
The cannula member ~4 includes an elongate tubular member 46 which has an inner diameter substantially similar to the outer diameter of the needle section 16 and a cannula hub 50 with an axial bore 44 therethrough. The axial bore 44 of the cannula member 14 includes an enlarged diameter proximal end which tapers to a smaller diameter area near the distal end of the cannula hub 50 similar to the outside taper of the bore extension 42. The axial bore 44 continues from the distal end of the cannula hub 50 through the tubular member 46 and reduced diameter portion 48. The distal end of the tubular member 46 includes a tapered reduced diameter portion 48 which is positioned distally of the heveled needle point 20 in the locked position of the introducer 10~ The proximal end of the cannula hub 50 includes a pair of luer extensions 40 which pre~erably have a luer lock angle of approximately 6 degrees. The finger member 52 is preferably located near the distal end of cannula hub 50 and extends radially from the cannula hub 50 in longitudinal alignment with the finger member 32 of the needle hub 18 when the introducer 10 i5 in the locked position. The location of the finger member 32 near the distal end of the cannula hub 50 allows the nurse a sufficient area on the proximal end of the cannula hub 50 to tape the proximal end of the cannula hub 50 to the skin of the patient i~ the catheter is to be inserted at a later time.
When the introducer 10 is assembled for insertion into the patient's blood vessel, the needle section 16 of the ; introducer needle 12 extends through the tubular member 46 of the cannula member 14 and the beveled needle point 20 of the needle section 16 extends distally a short distance beyond the reduced diameter portion 48 o~ the tubular member 46. The bore extension 42 on the distal end of the needle hub 18 extends into and sealingly contacts the inner surface o~ the axial bore 44 of the cannula member 14. One of the luer extensions 40 on the proximal end of the cannula member 14 is retained in the groove area formed by the finger member 32, the locking ridge 36 and the retaining ridge 38 so that the finger member 32 and locking ridge 36 prevent longitudinal movement of the luer extension 40 therein and the retaining ridge 38 prevents counterclockwise movement of the luer extension 40 therein. Tharefore, once the introducer 10 has pierced the patient's blood vessel, the nurse may rotate the finger member 52 on the cannula member 14 clockwise to release the intrsducer needle 12 from the cannula member 14 so that the introducer needle 12 may then be withdrawn from the patient's blood vessel.
In the alternate embodiment illustrated in Figs. 6 and 7, like numbers have been applied to like elements in order to illustrate the common elements of the respective embodiments. In this alternate embodiment, the distal side of the finger member 32 on the needle hub 18 includes a distally extending groove member 34 which extends substantially parallel to the bore extension 42 and axial bore 22. The bottom surface of the groove member 34 in this emhodiment includes a locking ridge 36 which is parallel to and spaced apart from the finger member 32. A pair of lateral retaining lips 54 are oriented perpendicular to the finger member 32 and locking ridge 36 along the sides of the bottom surface of the groove member 34. ~s with the previous embodiment, the finger mamber 32 and the locking ridge 36 prevent longitudinal movement of the luer extension 40 in the groove area. The retaining lips 54 o~ this embodiment resist lateral movement of the luer extension 40 in the groove area but will allow the luer extension 40 to leave the groove area i* the finger member 52 on the cannula member 14 is rotated while the finger member 32 on the introducer needle is held in position. Therefore, once the introducer 10 of this embodiment has pierced the patient's blood vessel, the nurse may rotate the finger member 52 clockwise or counterclockwise with respect to the finger member 32 so that the luer extensisn 40 passes over the retaining lip 54 and the introducer needle 12 may then be removed from the patient's blood vessel.
Next, in the preferred procedure as described above, the cannula member 14 is advanced into the patient's blood vessel and a standard guidewire (not shown) is inserted through the axial bore 44 of the cannula member 14 and into the patient's blood vessel. The cannula member 14 is then removed and a catheter (not shown) may be passed over the guidewire and advanced to the desired location in the patient's blood vessel. Finally, the guid~wire is removed from inside the catheter and the catheter is flushed prior to use.
Claims (10)
1. An over the needle catheter introducer comprising a cannula member having an elongate tubular member and a cannula hub with an axial bore extending through said tubular member and said cannula hub; an introducer needle having an elongate needle section and an needle hub; said cannula hub having distal and proximal ends and a luer extension on said proximal end; a finger member on said introducer needle extending radially therefrom generally perpendicular to said needle section; a groove member extending distally from said finger member to releasably engage said luer extension therein when said introducer needle is inserted into said cannula member such that at least a portion of said needle section extends beyond said tubular member; and said groove member including top and bottom surfaces and said bottom surface including a locking ridge and retaining means positioned distally of said finger means and wherein said locking ridge and said retaining means are oriented on said bottom surface of said groove member to limit the lateral and longitudinal movement of said luer extension in said groove member.
2. The introducer of claim 1, wherein said cannula member includes a finger member thereon extending outwardly from said cannula member and wherein said finger member on said cannula member is longitudinally aligned with said finger member on said introducer needle when said luer extension is engaged in said groove member.
3. The introducer of claim 1, wherein said locking ridge is oriented generally perpendicular to said retaining means on said bottom surface of said groove member.
4. An over the needle catheter introducer comprising a cannula member having an elongate tubular member and a cannula huh with an axial bore extending through said tubular member and said cannula hub; an introducer needle having an elongate needle section and an needle hub; said cannula hub having distal and proximal ends and a luer extension on said proximal end; a finger member on said introducer needle extending radially therefrom generally perpendicular to said needle section; a groove member extending distally from said finger member to releasably engage said luer extension therein when said introducer needle is inserted into said cannula member such that at least a portion of said needle section extends beyond said tubular member; wherein said groove member includes top and bottom surfaces and a locking ridge on the bottom surface thereof wherein said locking ridge is generally perpendicular to and spaced apart from said singer member to prevent the longitudinal movement of said luer extension from said groove member; wherein said groove member further includes a retaining means on the bottom surface of said groove member oriented generally perpendicular to the locking ridge and finger member to limit lateral movement of said luer extension in said groove member.
5. An over the needle catheter introducer comprising a cannula member having an elongate tubular member and a cannula hub with an axial bore extending through said tubular member and said cannula hub; an introducer needle having an elongate needle section and an needle hub; said cannula hub having distal and proximal ends and a luer extension on said proximal end; a finger member on said introducer needle extending radially therefrom generally perpendicular to said needle section; a groove member extending distally from said finger member to releasably engage said luer extension therein when said introducer needle is inserted into said cannula member such that at least a portion of said needle section extends beyond said tubular member; wherein said groove member includes top and bottom surfaces and a locking ridge on the bottom surface thereof wherein said locking ridge is generally perpendicular to and spaced apart from said finger member to prevent the longitudinal movement of said luer extension from said groove member; and wherein aid groove member further includes a retaining means on the bottom surface of said groove member to prevent the rotational movement of the luer extension in at least one lateral direction.
6. The introducer of claim 1, wherein the distal end of the introducer needle includes a beveled needle point wherein the apex of the needle point is on the longitudinal side of the introducer needle opposite the finger member.
7. An over the needle catheter introducer comprising a cannula member having distal and proximal ends and an elongate tubular member and a cannula hub with an axial bore extending through said tubular member and said cannula hub;
an introducer needle having distal and proximal ends and an elongate needle section and a needle hub with an axial bore extending through said needle section and said hub a first finger member on said needle hub extending outwardly therefrom generally perpendicularly to the axial bore in said introducer needle; a second finger member on said cannula hub extending outwardly therefrom generally perpendicular to the axial bore in said cannula member; a luer extension extending radially from the proximal end of said cannula member; a groove member extending distally from said first finger member and generally parallel to the axial bore of said needle introducer to releasably engage said luer extension therein when said introducer needle is inserted into said cannula member such that at least a portion of said needle section extends distally beyond the tubular member and wherein said first and second finger members are longitudinally aligned along the axial bore of said cannula member; and said groove member including top and bottom surfaces and said bottom surface includes a locking ridge and at least one retaining means thereon oriented on said bottom surface of aid groove member to limit the lateral and longitudinal movement of said luer extension in said groove member.
an introducer needle having distal and proximal ends and an elongate needle section and a needle hub with an axial bore extending through said needle section and said hub a first finger member on said needle hub extending outwardly therefrom generally perpendicularly to the axial bore in said introducer needle; a second finger member on said cannula hub extending outwardly therefrom generally perpendicular to the axial bore in said cannula member; a luer extension extending radially from the proximal end of said cannula member; a groove member extending distally from said first finger member and generally parallel to the axial bore of said needle introducer to releasably engage said luer extension therein when said introducer needle is inserted into said cannula member such that at least a portion of said needle section extends distally beyond the tubular member and wherein said first and second finger members are longitudinally aligned along the axial bore of said cannula member; and said groove member including top and bottom surfaces and said bottom surface includes a locking ridge and at least one retaining means thereon oriented on said bottom surface of aid groove member to limit the lateral and longitudinal movement of said luer extension in said groove member.
8. The introducer of claim 7, wherein said locking ridge is oriented generally perpendicular to said at least one retaining means on said bottom surface of said groove member.
9. An over the needle catheter introducer comprising a cannula member having distal and proximal ends and an elongate tubular member and a cannula hub with an axial bore extending through said tubular member and said cannula hub;
an introducer needle having distal and proximal ends and an elongate needle section and a needle hub with an axial bore extending through said needle section and said hub a first finger member on said needle hub extending outwardly therefrom generally perpendicularly to the axial bore in said introducer needle; a second finger member on said cannula hub extending outwardly therefrom generally perpendicular to the axial bore in said cannula member; a luer extension extending radially from the proximal end of said cannula member; a groove member extending distally from said first finger member and generally parallel to the axial bore of said needle introducer to releasably engage said luer extension therein when said introducer needle is inserted into said cannula member such that at least a portion of said needle section extends distally beyond the tubular member and wherein said first and second finger members are longitudinally aligned along the axial bore of said cannula member; wherein said groove member includes top and bottom surfaces and a locking ridge thereon oriented parallel to said first finger member to prevent the longitudinal movement of said luer extension from said groove member; and wherein said groove member further includes a retaining ridge on the bottom surface thereof oriented generally perpendicular to said locking ridge and said first finger member to prevent the counterclockwise rotational movement of said luer extension from said groove member.
an introducer needle having distal and proximal ends and an elongate needle section and a needle hub with an axial bore extending through said needle section and said hub a first finger member on said needle hub extending outwardly therefrom generally perpendicularly to the axial bore in said introducer needle; a second finger member on said cannula hub extending outwardly therefrom generally perpendicular to the axial bore in said cannula member; a luer extension extending radially from the proximal end of said cannula member; a groove member extending distally from said first finger member and generally parallel to the axial bore of said needle introducer to releasably engage said luer extension therein when said introducer needle is inserted into said cannula member such that at least a portion of said needle section extends distally beyond the tubular member and wherein said first and second finger members are longitudinally aligned along the axial bore of said cannula member; wherein said groove member includes top and bottom surfaces and a locking ridge thereon oriented parallel to said first finger member to prevent the longitudinal movement of said luer extension from said groove member; and wherein said groove member further includes a retaining ridge on the bottom surface thereof oriented generally perpendicular to said locking ridge and said first finger member to prevent the counterclockwise rotational movement of said luer extension from said groove member.
10. An over the needle catheter introducer comprising a cannula member having distal and proximal ends and an elongate tubular member and a cannula hub with an axial bore extending through said tubular member and said cannula hub;
an introducer needle having distal and proximal ends and an elongate needle section and a needle hub with an axial bore extending through said needle section and said hub a first finger member on said needle hub extending outwardly therefrom generally perpendicularly to the axial bore in said introducer needle; a second finger member on said cannula hub extending outwardly therefrom generally perpendicular to the axial bore in said cannula member; a luer extension extending radially from the proximal end of said cannula member; a groove member extending distally from said first finger member and generally parallel to the axial bore of said needle introducer to releasably engage said luer extension therein when said introducer needle is inserted into said cannula member such that at least a portion of said needle section extends distally beyond the tubular member and wherein said first and second finger members are longitudinally aligned along the axial bore of said cannula member; wherein said groove member includes top and bottom surfaces and a locking ridge thereon oriented parallel to said first finger member to prevent the longitudinal movement of said luer extension from said groove member; and wherein said groove member further includes at least one retaining lip on the bottom surface thereof oriented generally perpendicular to said locking ridge to limit the rotational movement of said luer extension from said groove member.
an introducer needle having distal and proximal ends and an elongate needle section and a needle hub with an axial bore extending through said needle section and said hub a first finger member on said needle hub extending outwardly therefrom generally perpendicularly to the axial bore in said introducer needle; a second finger member on said cannula hub extending outwardly therefrom generally perpendicular to the axial bore in said cannula member; a luer extension extending radially from the proximal end of said cannula member; a groove member extending distally from said first finger member and generally parallel to the axial bore of said needle introducer to releasably engage said luer extension therein when said introducer needle is inserted into said cannula member such that at least a portion of said needle section extends distally beyond the tubular member and wherein said first and second finger members are longitudinally aligned along the axial bore of said cannula member; wherein said groove member includes top and bottom surfaces and a locking ridge thereon oriented parallel to said first finger member to prevent the longitudinal movement of said luer extension from said groove member; and wherein said groove member further includes at least one retaining lip on the bottom surface thereof oriented generally perpendicular to said locking ridge to limit the rotational movement of said luer extension from said groove member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/406,649 US4973313A (en) | 1989-09-13 | 1989-09-13 | Over the needle catheter introducer |
| US07/406,649 | 1989-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1327500C true CA1327500C (en) | 1994-03-08 |
Family
ID=23608891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000613477A Expired - Lifetime CA1327500C (en) | 1989-09-13 | 1989-09-27 | Over the needle catheter introducer |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4973313A (en) |
| CA (1) | CA1327500C (en) |
Families Citing this family (41)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5061244A (en) * | 1990-03-09 | 1991-10-29 | Becton, Dickinson And Company | Pudendal/paracervical block needle assembly |
| US5474539A (en) * | 1991-02-07 | 1995-12-12 | Origin Medsystems, Inc. | Trocar with retracting tip |
| US5201323A (en) * | 1991-02-20 | 1993-04-13 | Brigham & Women's Hospital | Wire-guided cytology brush |
| US5209736A (en) * | 1991-10-18 | 1993-05-11 | Ethicon, Inc. | Trocar method and apparatus |
| US5205828A (en) * | 1991-10-24 | 1993-04-27 | Dan Kedem | Epidural needle location indicator assembly |
| US5672158A (en) * | 1992-01-07 | 1997-09-30 | Sherwood Medical Company | Catheter introducer |
| US5248298A (en) * | 1992-04-16 | 1993-09-28 | Ethicon, Inc. | Insert for shielded trocar |
| US5322514A (en) * | 1992-08-19 | 1994-06-21 | Sherwood Medical Company | Needle assembly with detachable wing |
| DE59310202D1 (en) * | 1992-11-24 | 2001-09-27 | Braun Melsungen Ag | Catheterization kit |
| US5437645A (en) * | 1993-10-08 | 1995-08-01 | United States Surgical Corporation | Surgical instrument positioning device |
| US5885217A (en) * | 1995-01-20 | 1999-03-23 | Tyco Group S.A.R.L. | Catheter introducer |
| US5704915A (en) * | 1995-02-14 | 1998-01-06 | Therex Limited Partnership | Hemodialysis access device |
| US5846226A (en) * | 1997-05-12 | 1998-12-08 | Urmey; William F. | Spinal-epidural administration system |
| USD417733S (en) * | 1998-04-28 | 1999-12-14 | Becton, Dickinson And Company | Catheter introducer needle assembly |
| AU5513001A (en) * | 2000-04-28 | 2001-11-12 | Keng Siang Richard Teo | A cannula assembly |
| US6533762B2 (en) * | 2000-09-01 | 2003-03-18 | Angiolink Corporation | Advanced wound site management systems and methods |
| US6558353B2 (en) * | 2001-01-25 | 2003-05-06 | Walter A. Zohmann | Spinal needle |
| US8048031B2 (en) * | 2001-10-26 | 2011-11-01 | Retractable Technologies, Inc. | IV catheter introducer |
| EP1620161B1 (en) | 2003-04-24 | 2010-08-04 | Innovation Medical Products Holding B.V. | Device for inserting a drain and handle for such a device |
| US8333734B2 (en) * | 2003-07-03 | 2012-12-18 | Walter A. Zohmann | Fenestrated peripheral nerve block needle and method for using the same |
| US20070270758A1 (en) * | 2006-05-22 | 2007-11-22 | Gert Hanner | IV catheter assembly with an ergonomic needle grip |
| US8449503B2 (en) | 2010-11-30 | 2013-05-28 | Custom Medical Applications | Neural injection system and related methods |
| US9480800B2 (en) | 2006-09-11 | 2016-11-01 | Custom Medical Applications | Neural injection system and related methods |
| US20080065029A1 (en) * | 2006-09-11 | 2008-03-13 | Racz N S | Nerve block needle and related methods |
| US9888940B2 (en) | 2006-09-11 | 2018-02-13 | Custom Medical Applications | Neural injection system and related methods |
| US8377005B2 (en) | 2006-09-11 | 2013-02-19 | Custom Medical Applications | Neural injection system and related methods |
| US8690832B2 (en) | 2007-06-13 | 2014-04-08 | Custom Medical Applications | Retrofitted neural injection system and related methods |
| CA2690806C (en) | 2007-06-13 | 2015-06-02 | Epimed International, Inc. | Safety neural injection system and related methods |
| US20110226647A1 (en) * | 2010-03-17 | 2011-09-22 | Cook Incorporated | Introducer assembly extension and method of use |
| US9526872B2 (en) | 2010-03-17 | 2016-12-27 | Cook Medical Technologies Llc | Introducer assembly extension and method of use |
| WO2011118643A1 (en) | 2010-03-26 | 2011-09-29 | テルモ株式会社 | Indwelling needle assembly |
| US9028425B2 (en) * | 2010-07-15 | 2015-05-12 | Becton, Dickinson And Company | Vented blood sampling device |
| US9375551B2 (en) * | 2010-09-01 | 2016-06-28 | Becton, Dickinson And Company | Neonatal and pediatric catheter system |
| EP2740422A1 (en) | 2012-12-05 | 2014-06-11 | Custom Medical Applications | Safety neural injection system and related methods |
| US10265504B2 (en) | 2013-03-15 | 2019-04-23 | Custom Medical Application | Safety neural injection system and related methods |
| US20180263860A1 (en) * | 2015-09-04 | 2018-09-20 | Indiana University Research And Technology Corporation | Delivery systems for application of antibiotic gel formulation |
| US10682495B2 (en) * | 2015-12-18 | 2020-06-16 | B. Braun Melsungen Ag | Needle devices with adjustable grips and related methods |
| WO2017103103A1 (en) * | 2015-12-18 | 2017-06-22 | B. Braun Melsungen Ag | Needle devices with adjustable grips and related methods |
| US10898223B2 (en) | 2016-03-28 | 2021-01-26 | Becton, Dickinson And Company | Multi-diameter cannula |
| US10028768B2 (en) * | 2016-04-20 | 2018-07-24 | Gayle MISLE | Cannula and needle assembly |
| SE1951197A1 (en) * | 2019-10-23 | 2021-04-13 | Anesteasy Ab | A catheter device comprising a levering member |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3568679A (en) * | 1968-11-12 | 1971-03-09 | Dow Corning | Catheter placement unit |
| US3714945A (en) * | 1970-12-17 | 1973-02-06 | Vicra Sterile Inc | Digit manipulable quick release cannula insertion device |
| US3739778A (en) * | 1971-08-12 | 1973-06-19 | Bard Inc C R | Catheter introduction system |
| US3853130A (en) * | 1973-12-04 | 1974-12-10 | D Sheridan | Sterile handling catheter assemblies |
| US4013080A (en) * | 1974-10-03 | 1977-03-22 | Froning Edward C | Cannula connector and direction indicator means for injection system |
| US4191305A (en) * | 1977-05-09 | 1980-03-04 | The Continental Group, Inc. | Container having blown plastic liner and method and apparatus for forming same |
| US4191186A (en) * | 1977-12-12 | 1980-03-04 | Abbott Laboratories | Removable digit engageable means for separating a catheter and stylet |
| US4209015A (en) * | 1978-05-24 | 1980-06-24 | Wicks Anthony E | Parenteral administration apparatus |
| US4230123A (en) * | 1978-10-31 | 1980-10-28 | Hawkins Jr Irvin F | Needle sheath complex and process for decompression and biopsy |
| US4362156A (en) * | 1979-04-18 | 1982-12-07 | Riverain Corporation | Intravenous infusion assembly |
| US4496348A (en) * | 1979-11-29 | 1985-01-29 | Abbott Laboratories | Venipuncture device |
| US4292970A (en) * | 1980-01-24 | 1981-10-06 | Hession Jr William M | Apparatus for intravenous catheter starter |
| US4311137A (en) * | 1980-04-30 | 1982-01-19 | Sherwood Medical Industries Inc. | Infusion device |
| FR2522504B1 (en) * | 1982-03-05 | 1985-07-12 | Durand Alain | CATHETERIZATION DEVICE FOR USE IN PERFUSIONS IN THE MEDICAL AND VETERINARY FIELDS |
| US4445893A (en) * | 1982-05-13 | 1984-05-01 | Sherwood Medical Company | Infusion apparatus |
| DE3304914C2 (en) * | 1983-02-12 | 1986-02-27 | Fresenius AG, 6380 Bad Homburg | Device for inserting a catheter |
| US4790817A (en) * | 1985-03-28 | 1988-12-13 | Luther Medical Products, Inc. | Assembly of stylet and catheter, and needle and catheter |
| US4711636A (en) * | 1985-11-08 | 1987-12-08 | Bierman Steven F | Catheterization system |
| US4828549A (en) * | 1986-09-10 | 1989-05-09 | Critikon, Inc. | Over-the-needle catheter assembly |
| US4834708A (en) * | 1987-03-31 | 1989-05-30 | George Pillari | Puncture needle assembly |
-
1989
- 1989-09-13 US US07/406,649 patent/US4973313A/en not_active Expired - Lifetime
- 1989-09-27 CA CA000613477A patent/CA1327500C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US4973313A (en) | 1990-11-27 |
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| MKEX | Expiry |
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