WO1998001178A1

WO1998001178A1 - Device for placing a guide in a vein by means of a tapping needle

Info

Publication number: WO1998001178A1
Application number: PCT/FR1997/001180
Authority: WO
Inventors: Michel Baufume; Daniel Rossi
Original assignee: Vygon
Priority date: 1996-07-04
Filing date: 1997-07-02
Publication date: 1998-01-15
Also published as: FR2750608A1; FR2750608B1

Abstract

The invention concerns a device for placing a guide in a vein by means of a tapping needle. The device comprises a syringe (S), a needle (A) and a joining piece (E) with an outlet (4a) to carry the needle and two inlets communicating with this outlet via respective internal passages, one of these inlets (3a) being designed for mounting the joining piece on the nozzle (1a) of the syringe and the other for inserting the guide into the needle. A guide dispenser (7) is slidingly mounted on the syringe, for instance by means of a base (6) directly attached on the syringe, such that it is possible to move the dispenser towards the joining piece by hand. The dispenser enables the guide to be slid into the guide inlet of the joining piece right into the needle. The invention is useful for placing a guide in a vein, in particular for inserting a catheter by Seldinger's method.

Description

- a puncture needle (A) (normally protected by a removable tubular cap which has not been shown) with its mounting connector (R);

- a nozzle (E) made up of three parts, namely a rear connector (3), a front connector (4) and a seal (5);

- a distributor holder base (6);

- a guide distributor (7);

- a guide (not visible in this figure) in its protective sheath (11).

- an optional part (V) to keep the dispenser in the retracted position on the base during storage and transport.

As can be seen in FIG. 3A where the end piece constituted by the one-piece assembly of the parts (3), (4) and (5) has been represented, the rear connector (3) of the end piece has an inlet (3a) for screwing the tip onto the nose (la) of the syringe and a parallel inlet (3b) for introducing the guide into the tip. The front connector (4) of the endpiece has an outlet (4a) for mounting a puncture needle (4) and the outlet of the guide. The front and rear connectors have internal passages (8, 9) communicating with the outlet (4a).

In certain embodiments, the needle can be integral with the end piece, for example if the end piece or the front connector of the end piece is molded on the needle.

The inlet (3b) is aligned with the outlet (4a) and the seal (5) is arranged in the passage (9) which connects this inlet and this outlet to close this passage. The base (6) has a lower part (6a) in the form of a saddle capable of being clipped onto the body of the syringe and it has an upper part (6b) which has an aligned front bearing and a rear bearing (6c, 6d ) in which the guide distributor (7) can slide with the possibility of lateral tilting.

The base (6) is designed to be moved by sliding against the end piece. In the example shown, the base comprises at its front end a cradle (6e) capable of abutting against the rear connector (3) of the end piece (FIGS. 2A, 2B, 3B) and of aligning the end piece and the base (therefore the distributor).

The guide distributor (7) is an elongated piece, threadable in the bearings (6c, 6d) of the base, which has at the front a straight and tubular guide outlet (7a) and at the rear an inlet for straight and tubular guide (7b) which, in this example, is parallel to the outlet but offset, and the distributor has between this inlet and this outlet an uncovered portion (7c) against which the guide can be pressed when it is desired to slide the guide on the distributor in one direction or in opposite direction.

The distributor (7) also has at the rear an appendage (7d) which is received in the rear bearing (6d) of the base (6) and which can slide in said bearing.

This appendix has a prismatic external section which corresponds to a prismatic internal shape of the rear bearing, the play existing between the two parts and the elasticity of the plastic materials used, making it possible to snap the distributor into the bearing for different predetermined angular positions. of the distributor, the passage from one position to the other being effected by manually forcing the distributor to pivot.

The distributor has a lug (7e) which abuts against the rear bearing (6d) of the base in order to limit the recoil of the distributor before it - The distributor has a rectilinear guide inlet parallel but offset from the guide guide outlet of the distributor.

- The dispenser mounting means comprise a base which can be moved longitudinally on the syringe and which carries the dispenser.

- the base is detachably attached to the syringe.

- The base has at the front a part capable of cooperating with the end piece to determine a longitudinal end-of-travel position from the base to the end piece, as well as to align the base and the end piece.

- The dispenser is detachably attached to the base, which allows independent use of the dispenser.

- The dispenser is mounted on the base so as to be able to slide on the base along an axis of translation which is parallel to the axis of the syringe.

- The base comprises a cradle which overlaps the syringe and bearings in which the dispenser is held so as to be able to slide longitudinally on the base.

- The distributor is mounted on the base so that it can be tilted laterally on the base without changing the alignment of the guide outlet of the distributor and the guide inlet of the nozzle.

- The distributor is snapped into one of the bearings of the base so that it can be tilted in the bearing from one to the other from several stable angular positions.

- stop means are provided to define the service position of the distributor so that in this position, the guide output of the dispenser passes through a seal which prevents communication between the guide inlet of the nozzle and the needle holder outlet of the nozzle.

- locking means are provided to prevent the dispenser from falling back onto the base when the dispenser is in the end of translation position towards the end piece, so that voluntary manual intervention is necessary to overcome the action of said means of locking.

the guide has an elastic end which is curved in the form of a J when it is free at the outlet of the dispenser and which becomes rectilinear when it is moved back and retracted into the tubular end of the dispenser, and the guide inlet of the tip has a groove capable of protecting the J-shape of the guide.

An exemplary embodiment of a device according to the invention will be described below, with reference to the figures of the attached drawing in which:

- Figure 1 is an exploded view of the device;

- Figures 2A and 2B are diagrams of the device, excluding the needle and the guide dispenser, respectively in side view and in top view;

- Figures 3A to 3D show the device in side view, during different phases of its use.

FIG. 1 represents, seen from the outside, the different parts which make up this embodiment of the device of the invention:

The device includes (fig. 1):

- a syringe (S) of the "Luer-lock" type, the body (1) and the piston (2) of which have been shown. DEVICE FOR THE PLACEMENT OF A GUIDE IN A VEIN BY MEANS OF A PUNCTURE NEEDLE

5

The invention relates to the placement of a linear guide in a vein, in particular for the introduction of a catheter according to the Seldinger method.

0 The Seldinger method consists in principle, after having punctured the vein by means of a needle mounted at the end of a syringe, to introduce by the needle into the vein a guide, generally consisting of contiguous metal turns , flexible enough to follow a course with 5 curvatures, to withdraw the needle leaving the guide in place and to place the catheter in the vein by threading it on the guide, then to remove said guide leaving the catheter in place.

Various devices have been proposed to allow the introduction 0 of the guide into the needle without having to detach this needle from the syringe beforehand.

In one type of device (for example that of US Pat. No. 4,274,408), the piston of the syringe has an axial passage 5 in which the guide can be threaded, means being provided to seal the passage at the desired times .

In another type of device, the syringe is equipped with a tip which has an outlet on which the needle is mounted, and two 0 inlets communicating with this outlet through internal passages, one of the inlets being designed for mounting the tip on the nose of the syringe and the other inlet being designed for the introduction of the guide into the needle. Such devices are described for example in the publications US-5,147,314 and DE-41,36051. Whatever device is used, the practitioner must hold the syringe and simultaneously push the guide to advance it through the needle.

The present invention aims to facilitate this manipulation.

The invention thus relates to a device for the establishment of a guide in a vein by means of a puncture needle, in particular for the introduction of a catheter according to the Seldinger method, this device comprising a syringe, a needle and an endpiece which has an outlet for carrying the needle and two inlets communicating with this outlet through respective internal passages, one of the inlets being designed for mounting the endpiece on the syringe and the another inlet being designed for the introduction of the guide into the needle, characterized in that the device comprises a guide dispenser which has a guide outlet, mounting means being provided for mounting this slide distributor on the syringe so that the distributor guide outlet is aligned with the guide inlet of the nozzle and can be brought closer to it in a service position or be moved away by translation of the distributor on the seri ngue.

In particular embodiments, the device of the invention also has one or more of the following characteristics:

- the nozzle has a seal which prevents communication between the guide inlet of the nozzle and the needle holder outlet of the nozzle and which is crossed by the guide outlet of the dispenser when the latter is in service position so that the guide passes through the joint without rubbing against the joint when it is spun into the endpiece.

- The distributor has a straight and tubular guide outlet preceded by a zone where the guide is accessible and can be pushed manually towards this outlet. commissioning.

The distributor also has a lug (7f) which abuts against the rear bearing (6d) of the base to prevent an involuntary retreat of the distributor when the latter is in the service position (figs. 3C and 3D).

The flexible guide (10) is normally contained in a sheath (1 1) whose front end (l ia) is wedged in the inlet (7b) of the distributor (fig. 3C). Clips (12) hold the wrapped sheath on itself (fig. 1).

In the embodiment shown, the rear connector of the end piece has, upstream of the entry of the guide (3b) two wings (3c, 3c ') and a bottom (3d) which determine between them a groove (3e) (fig . 2B).

The cradle (6th) of the base is capable of sliding on the external faces of the wings (3c, 3c ') until it abuts against a face (3f) of the connector (3) (FIGS. 2A and 2B), and the tubular end (7a) of the dispenser is able to be received in the groove (3e), between the wings (3c, 3 c ') (Figures 3). This groove is also useful for protecting the front end of the guide when this end is J-shaped (fig. 3A), a configuration usually chosen so as not to be traumatic.

The device is delivered with the base pre-assembled or not on the syringe, with the guide distributor pre-mounted or not on the base and the end piece pre-assembled or not on the syringe, the needle is preferably delivered with the device and the guide with its sheath preferably being delivered with the device and in place on the dispenser.

FIG. 3A shows the device in the standby configuration, the base (6) being in abutment against the end piece and the distributor being in a position such that the J-end of the guide (10) is in the groove ( 3e) which precedes the guide entry (3b) of the nozzle. The lock (V) is threaded into the side opening located at the rear of the dispenser. To use the device, the operator removes the lock, returns the guide (10) to the tubular end (7a) of the dispenser (by pulling the guide in the direction of the arrow (13) in Figure 3B), then pushes the dispenser forward until the tubular end (7a) enters the inlet (3b) of the nozzle and passes through the seal (5) (Figure 3C).

By pushing the guide (10) (arrow 14 in Figure 3D) the operator then penetrates the guide into the needle.

It will be noted that the stop of the shoulder (7f) of the distributor against the bearing (6d) of the base locks the distributor in the service position (Figures 3C and 3D) and that the guide (10) passes through the seal (5 ) without friction and without risk of deterioration since it is not in contact with this joint, very appreciable advantage on the devices where the guide is threaded directly through the joint.

It will also be noted that the dispenser can be tilted around its axis of translation on the base, depending on whether the user prefers to have it on the right side or on the left side for handling.

It will also be noted that the distributor can be removed from the base, the bearing (6c) consisting of an open ring in the upper part and allowing the front of the distributor to be released when the latter is turned to one side or the other. It therefore suffices to move the base back, to advance the distributor in order to release its end (7d) from the bearing (6d) of the base, then to turn the distributor in order to release it from the bearing (6c). We can then use the dispenser with the guide and the protective sheath as a conventional guide pusher.

The embodiment which has been described does not limit the scope of the invention.

Claims

ii Device for placing a guide (10) in a vein by means of a puncture needle, in particular for the introduction of a catheter according to the Seldinger method, this device comprising a syringe (1 ), a needle (A) and a tip (3, 4, 5) which has an outlet (4a) for carrying the needle and two inlets (3a; 3b) communicating with this outlet through respective internal passages (8, 9 ), one (3a) of the inlets being designed for mounting the nozzle on the syringe and the other inlet (3b) being designed for the introduction of the guide into the needle, characterized in that the device comprises a guide distributor (7) which has a guide outlet (7a), mounting means (6) being provided for mounting this sliding distributor on the syringe so that the guide outlet (7a) of the distributor is aligned with the guide inlet (3b) of the endpiece and can be brought close to it in a service position or away from it ée by translation of the dispenser on the syringe.

2 _^ Device according to claim 1, wherein the tip has a seal (5) which prevents communication between the guide inlet (3b) of the tip and the needle holder outlet (4a) of the 'end piece and which is crossed by the guide outlet (7a) of the distributor when the distributor is in the service position, so that the guide passes through the seal without contact with the seal when it is threaded into the end piece.

∑ Device according to one of claims 1 and 2, wherein the dispenser (7) comprises a straight and tubular guide outlet (7a) preceded by an uncovered area (7c) where the guide is accessible and can be manually pushed towards this exit.

4. Device according to claim 3, wherein the distributor (7) has a straight and tubular guide inlet (7b) parallel but offset from its guide outlet (7a). 5i Device according to one of claims 1 to 4, wherein the dispenser mounting means comprise a base (6) which can be moved longitudinally on the body (1) of the syringe and which carries the dispenser (7).

6. Device according to claim 5, wherein the base (6) is detachably attached to the body (1) of the syringe.

7. Device according to one of claims 5 and 6, wherein the base (6) has at the front a part (6e) capable of cooperating with the end piece (3) to determine a longitudinal end position from the base to the end piece as well as an alignment of the base and the end piece in this end of travel position.

8_ _t Device according to one of claims 5 to 7, wherein the distributor (7) is attached to the base (6) detachably.

â- Device according to one of claims 5 to 8, wherein the distributor (7) is mounted on the base (6) so as to be able to slide on the base along the axis of the syringe.

10. Device according to claim 6, wherein the base comprises a front bearing (6c) and a rear bearing (6d) in which the distributor is held so as to be able to slide longitudinally.

11. Device according to one of claims 5 to 10, in which the distributor (7) is mounted so that it can be tilted laterally on the base (6) without modifying the alignment of its guide outlet (7a) and from the guide entry (3b) of the nozzle.

12. Device according to claims 10 and 1 1, wherein the distributor is snapped into one (6d) of the bearings so that it can be tilted in the bearing of one or the other of several stable angular positions .

13. Device according to one of claims 1 to 12, wherein stop means are provided to define the service position of the distributor so that in its service position, the outlet (7a) of the distributor passes through a gasket sealing (5) which prevents communication between the guide inlet (3b) of the nozzle and the outlet (4a) of the nozzle when the distributor is not in the service position.

14. Device according to claim 13, wherein these stop means limit in both directions the translational travel of the dispenser.

15. Device according to claim 13 or 14 and one of claims 3 to 9, wherein the stop means comprise a lug (7f) on the distributor and a bearing (6d) on the base.

16. Device according to one of claims 1 to 15, in which the outlet end (7a) of the distributor is tubular and the end piece has, upstream of the guide inlet, a groove (3e) capable of receiving sliding this end so that said end (7a) is aligned with said guide inlet.

17. Device according to claim 16, wherein the guide (8) has an elastic end which is J-shaped when it is free at the outlet (7a) of the dispenser and which, when it is contained in this outlet takes the shape imposed by the outlet, and said groove (3e) is capable of receiving this end and of protecting its configuration in J as long as the guide outlet of the distributor is not introduced into the guide inlet (3b) of the 'tip.