Apparatus and method for an introducer

• US 5,141,497 A
• Filed: 06/06/1989
• Issued: 08/25/1992
• Est. Priority Date: 06/06/1989
• Status: Expired due to Term

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Erskine, Timothy J.
• Primary Examiner(s): Yasko, John D.
• Assistant Examiner(s): Cermak, Adam J.
• Application Number:
  US07/362,136
• Time in Patent Office: 1,176 Days
• Field of Search: 604/164-170, 604/177, 604/178, 604/264, 604/280, 604/283, 604/160
• US Class Current: 604/164.05
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters
• CPC Class Codes: A61M 25/0668 splittable, tear apart

Abstract

The introducer has an adapter with a pair of wings extending at an acute angle to each other wherein the wings are used in handling, holding and splitting. A splittable catheter mounts in a part of the adapter and extends in alignment with an axis of the adapter. The adapter is molded about the splittable catheter tube. A needle and hub are in axial alignment with one another so the needle fits within the splittable catheter coaxial with the axis and the hub removably locks to the adapter to hold the splittable catheter coaxially about the needle during insertion of the needle and splittable catheter with an over the needle technique. Interengagement means on the adapter and the hub lock the axial relationship of the needle within the splittable catheter. An apex between the acute of the wings is parallel to the passageway therethrough and a weakened line is on a side of the adapter opposite the apex so that force applied to the wings to reduce the acute angle thereof will separate the weakened line and the apex initiating tearing of the splittable catheter. The method for using and making an introducer includes the steps of holding a winged adapter with the fingers of one hand, inserting the needle and splittable catheter into a blood vessel, releasing the lock between the adapter and the hub, removing the hub by withdrawing the needle from the catheter and squeezing the wings together to split the adapter and the catheter.

Claims

1. An introducer comprising:

an adapter with a first end and a second end and a first part on the first end and a second par ton the second end, the adapter having a passageway aligned along an axis thereof and passing therethrough to the second end, the adapter having a pair of wings each having a tip and a mount on and extending from the adapter, the mounting of the wings arranged to initiate splitting o the adapter as the tips of the positioned wings are brought toward one another;

a splittable catheter mounted to the first part of the adapter and extending outward from the first end in alignment with the axis of the passageway and in fluid tight communication therewith, the adapter weakened on a line substantially parallel its axis and the pair of wings positioned on the adapter so that an apex parallel to the axis is formed by the planes of the wings, which are positioned at an angle about 90°

or less relative to one another and substantially 180°

away from the weakened line;

a needle and hub means having a needle and a hub i axial alignment with one another so the needle fits within the splittable catheter coaxial with the axis with the hub and removably locked to the adapter to hold the splittable catheter coaxially about the needle during insertion of the needle and splittable catheter by an over the needle technique; and

interengagement means on the adapter and the hub for cooperatively locking the axial relationship of the needle within the splittable catheter after placement of the needle within the splittable catheter so that the hub is against the second end of the adapter, the interengagement means having an unlocking member for release of the locking of the adapter and the hub.

2. The introducer of claim 1 wherein the needle has a beveled tip extending from the splittable catheter, the tip being away from the adapter with the tip of the needle beyond the splittable catheter for penetration into a lumen of a vessel when inserting the splittable catheter and needle, and wherein the needle is movable axially through the splittable catheter and the passageway during removal of the needle from the splittable catheter after insertion with an over the needle procedure and upon unlocking of the interengagement means.

3. The introducer of claim 2 wherein the splittable catheter has preferential lines of weakness which extend therealong to facilitate and direct splitting and the lines of weakness are aligned with the apex and the weakened line when the adapter and hub are fully together.

4. The introducer of claim 1 wherein the wings extend at an acute angle relative to each other and the adapter with an apex therebetween aligned parallel to the passageway therethrough and a weakened line is on a side of the adapter opposite the apex so that when the hub is removed and force applied to the wings to reduce the acute angle thereof, the weakened line and the apex will separate initiating tearing of the splittable catheter near the first end.

5. An introducer comprising:

a splittable catheter tube having an elongate tubular body with at least one preferential line of weakness positioned in alignment with an elongate dimension thereof;

an adapter with a first end and a second end and a first part on the first end and a second part on the second end, the adapter having a passageway aligned along an axis of the adapter and passing through the first part from the first end into and through the adapter to the second end, the adapter receiving and mounting to the first part of the adapter the splittable catheter tube for extending outward from the first end in alignment with the axis of the passageway and in fluid communication therewith, the first part having an expandable attachment with the splittable catheter so that the splittable catheter tears upon expansion of the first part;

a pair of wings integral to the adapter extending therefrom with an acute angle between the wings, the wings joining the adapter and defining an apex along one side of the adapter, the wings for permitting holding, handling and splitting of the adapter when the hub is removed and force applied to the wings collapses the acute angle by first breaking the adapter along a side opposite the apex and then continued collapse of the acute angle of the wings separates the adapter along the apex; and

a pair of weakened lines along the adapter with one at the apex and the other on the opposite side to encourage breaking of the adapter along the lines upon application of stress to the wings and to thereby expand the first part to tear the splittable catheter tube.

6. The introducer of claim 5 wherein the wings include a fulcrum means cooperatively associated therewith to meet during the collapse of the wings, the fulcrum means transfers the stress applied to collapse the wing to the apex.

7. The introducer of claim 6 wherein the wings have opposed facing surfaces and the fulcrum means includes ribs on the wings extending from the apex toward each other in planes normal to the facing surfaces for engagement of the ribs with one another upon collapse of the wings.

8. The introducer of claim 7 wherein the adapter is made of an inflexible polymeric substance.

9. The introducer of claim 8 wherein the adapter is a molded polymeric substance.

10. The introducer of claim 5 wherein the interengagement means is on the adapter and the hub for cooperatively locking the axial relationship of the needle within the splittable catheter tube upon placement of the needle within the splittable catheter tube so that the hub is against the second end of the adapter, the interengagement means having an unlocking member for release and unlocking of the adapter and the hub.

11. The introducer of claim 10 wherein the unlocking member extends from the hub and is movable relative thereto in response to engagement of a portion thereof with the second part upon conjugation of the needle within the splittable catheter tube and the unlocking member has a latch to connect with the second part when the hub is against the second end.

12. The inserter of claim 11 wherein the second part has a catch between the wings, the wings have opposed facing surfaces with a fulcrum means including ribs extending from the apex toward each other in planes normal to the facing surfaces for engagement of the ribs with one another upon collapse of the wings.

13. The introducer of claim 12 wherein the latch is movable from a position of nonengagement to a position of locking with the adapter upon coaxial positioning of the needle in the splittable catheter and the catch is located between the wings and is associated with the ribs.

14. The introducer of claim 13 wherein the latch has a transverse part to engage the ribs.

15. A method for using and making an introducer including the following steps:

holding with the fingers of one hand an introducer having a winged adapter with a splittable catheter and a needle and hub means having a needle and a hub in axial alignment with one another and locked to the catheter;

inserting the needle and splittable catheter with an over the needle technique into a blood vessel;

releasing the lock between the winged adapter and the needle and hub means with the finger of the one hand;

removing the needle and hub means by withdrawing the needle and hub means from the splittable catheter and adapter with the one hand; and

squeezing the wings of the adapter together to cause the adapter and the catheter to split.

16. The method of claim 15 including the additional step of:

introducing a catheter through the splittable catheter prior to squeezing the wings of the adapter together to cause the winged adapter and the splittable catheter to split.

17. The method of claim 15 including the additional step of:

attaching the splittable catheter and winged adapter by molding the winged adapter about the splittable catheter at an end thereof.

18. An introducer comprising:

an adapter with a first end and a second end and a first part on the first end and a second par ton the second end, the adapter having a passageway aligned along an axis thereof and passing therethrough to the second end, the adapter having a pair of wings extending outwardly from the adapter for use in handling, holding and splitting the adapter, the adapter having an apex parallel to the passageway and along the place where the wings attach to the adapter, the adapter with a weakened line on the side thereof across from the apex;

a splittable catheter mounted to the first part of the adapter and extending outward from the first end in alignment with the axis of the passageway and in fluid tight communication therewith, the interengagement means having a latch on the hub and a catch on the adapter, the latch movable from a position of nonengagement to a position of locking with the adapter upon coaxial positioning of the needle in the splittable catheter, the catch being located between the wings;

a needle and hub means having a needle and a hub in axial alignment with one another so the needle fits within the splittable catheter coaxial with the axis with the hub and removably locked to the adapter to hold the splittable catheter coaxially about the needle during insertion of the needle and splittable catheter by an over the needle technique; and

interengagement means on the adapter and the hub for cooperatively locking the axial relationship of the needle within the splittable catheter after placement of the needle within the splittable catheter so that the hub is against the second end of the adapter, the interengagement means having an unlocking member for release of the locking of the adapter and the hub.

19. An introducer comprising:

a winged adapter with a first end and a second end and a first part on the first end and a second part on the second end, the adapter having a passageway aligned along an axis of the adapter and passing through the first part from the first end through the adapter to the second end, the adapter having a pair of laterally extending wings integral thereto extending therefrom for forming an acute angle therebetween with an apex along one side of the adapter, the pair of wings for permitting holding, handling and splitting of the adapter when the hub is removed therefrom and force applied to the wings to collapse the acute angle breaking the adapter along a side opposite the apex and continued collapse of the acute angle of the wings separates the adapter along the apex;

an elongate splittable catheter tube connected to the first part of the adapter with the passageway in fluid tight communication therewith, the splittable catheter tube having at least one line of weakness along the elongate dimension thereof, the connection between the first part and the splittable catheter tube with the adapter molded thereto to form the fluid tight communication between the adapter passageway and the splittable catheter tube;

a pair of weaken lines along the adapter with one at the apex and the other on an opposite side thereto for encouraging breaking of the adapter along the lines upon application of stress to the wings for expanding the first part to tear the splittable catheter tube;

a needle and hub means having a needle and a hub in axial alignment with one another wherein the needle fits within the splittable catheter tube coaxial with the axis with the hub removably locked to the adapter to hold the splittable catheter coaxially about the needle during insertion of the needle and splittable catheter with an over the needle technique; and

interengagement means in the adapter and the hub for cooperatively locking the axial relationship of the needle within the splittable catheter upon placement of the needle within the splittable catheter so that the hub is against the second end of the adapter, the interengagement means having an unlocking member for release of the locking of the adapter and the hub.