FI71490B - KATETERANSLUTNINGSHUVUD OMFATTANDE AOTMINSTONE EN I BASKROPPENBELAEGEN KANAL FOER ANSLUTNING AV ETT INFUSIONSSYSTEM KAT ETR ELLER MOTSVARANDE - Google Patents

Description

ANNOUNCEMENT 7 ^ 90

Φ L J 11 UTLÄG G N I N GSSKRI FT

c ijj:,:; ·. '; ty B (45) Pn t Jt ··· -1 ^ ·: 1 a t 1.)? <1]. '3' J 7 (51) Kv.lk. * / Lnt.CI. 'A 6l M 25/00, 5/14 FINLAND —FINLAND (2.1) Patent application Patentansökning 793798 (22) Application date Ansökningsdag 0 ^ .12.79 (23) Start date - Giltighetsdag 0A. 1 2.79 (41) Has become public - Blivit offentlig 05.06.81

Patent and Registration Office ..... ..... . . ..., 1 (44) Date of issue and date of issue. -

Patent- och rcgisterstyrelsen '' Ansökan utlagd och utl.skriften publicerad 10.10.86 (86) Kv. application Int. ansökan (32) (33) (31} Privilege claimed — Begird priority (71) Intermedicat GmbH, Gerliswi1 Strasse ^ 5, Emmenbrucke, Switzerland-Switzerland (CH) (72) Andreas Weikl, Erlangen, Max Hubmann, Erlangen, Federal Republic of Germany Förbundsrepub 1 iken Tyskland (DE) (7 * 0 Oy Koister Ab (5 * 0 Catheter1 connecting head with at least one channel in the base for connecting an infusion system, catheter or the like -Kateteranslutningshuvud omfattande ätminstone en i baskroppen belägen channels , catheter or mace variation

The invention relates to a catheter connection head according to the preamble of claim 1.

In such a known catheter (DE-AS 22 38 722), a hollow connection piece comprises a catheter plug, a connection plug for an infusion system or an additional catheter, and a flexible hose placed between each plug. The side-bending wall of the hose forms a part made of a flexible, self-closing material, such as rubber, which the injection needle can penetrate.

Apart from the fact that when the rubber wall is penetrated by a sharp metal cannula tip, there is no guarantee that smaller or very small parts of the rubber wall which may enter the bloodstream are detached, there is also a risk of the metal cannula piercing the rubber wall 2 71490 again, catheters left in the vessel from the puncture or catheter insertion tubes may be damaged.

In view of the prior art described above, the present invention relates to a catheter connector head for vascular puncture or permanent cannula devices which, on the one hand, is convenient and safe for the physician and, on the other hand, reduces or eliminates the risk of thrombosis or infection in a patient.

This object can be achieved by a device according to the preamble of claim 1, by means of the features of claim 1.

Due to the fact that the puncture cannula seal closes and locks automatically when the puncture cannula is retracted and both this and any other connecting end ducts are automatically sealed to the environment, no more puncture cannulas can be inserted into the base duct or ducts and damage catheters already placed in the wound. In addition, the sealing parts ensure that no air bubbles or any contaminants enter the bloodstream, so that the possibility of a blood clot is substantially reduced.

The subclaims relate to preferred embodiments of the idea of the invention.

The invention will be explained in more detail below with reference to the working examples shown in the drawing. Fig. 1 shows a side view of a catheter connection head with a puncture cannula inserted, Fig. 2 a corresponding longitudinal section thereof and Fig. 2a a locked locking device on an enlarged scale; Fig. 3 a side view of a catheter connection head with a locking device on an enlarged scale, Fig. 5 is a partially sectioned catheter connection head in plan view, Fig. 6 is a perspective side view of the catheter connection head with the catheter pre-positioned in the closure portion and the puncture cannula air seal and Fig. 7a on an enlarged scale of the locking structure, Fig. 8 is a longitudinal sectional side view of the catheter connection head with the inner closure part and its locking, Fig. Fig. 9a a slider under the action of a spring in a position in which only the insertion opening of the puncture cannula is open, Fig. 9a a slider in a position in which the puncture cannula can no longer be inserted, Fig. 9b is an enlarged side view of each end position of the slide rod; a hole in the puncture cannula insertion position, Fig. 10a is a disc-shaped closure member in a position in which the puncture cannula insertion hole is closed and ducts are open for catheter insertion or infusion system connection, and 10b is an enlarged view of the lock in the locked position.

The catheter connection head 1 essentially comprises a base part 2 provided with either only one straight duct 3 (Figures 1-5) or additional ducts 4 and 5 (Figures 6-10b), the axes of which form the letter "Y". In Figures 1 and 2, the puncture cannula 6 is inserted so deep into the catheter insertion tube 7 fixedly connected to the base part 2 that the puncture cannula 6 extends slightly outside the catheter insertion tube 7 in a manner known per se. When the puncturing step is completed, the puncture cannula 6 is pulled out, whereby the connecting and closing piece 9, which is affected by the spring 8, is released. The part 9 pivots so far that its cam 10 meets the stop 11 of the base part 2 (Fig. 2) and moves the holder 12 of the lock pin 13 so that the lock 13 is released and locked by the spring 14 into the recess 15 in the connecting and closing piece 9 or its cam 10. This prevents the connecting and closing piece 5 from springing back from this position. In order to prevent the connecting and closing piece 9 (Figures 3 and 4) in the extended position from being accidentally inserted or actuated by the puncture cannula 6, this part 9 is either so long or has a mounting cone which does not fit the puncture cannula so that the cannula cannot be attached to it. .

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The connecting and closing piece 9 pivots about a shaft 16 and is in the form of a two-arm lever, in which one lever arm can simultaneously act as a spring 8, while the second lever arm shows the actual connecting and locking piece 9, as shown in Figures 1-5.

The connecting and closing piece 9 is sealed with respect to the base part 2 in a known manner, in particular with ring seals 17, as shown in Figures 2a, 4a and 5. These seals prevent air and any dirt from entering the bloodstream from the outside.

As can be seen from Figures 6, 7 and 7a, the pivotable connecting and closing piece 9 can also be a single-arm lever. Instead of the connecting and closing piece 9, according to Fig. 6, being acted upon by an external spring 8, it is also possible to use an internal, and thus covered, spring 8, according to Fig. 7. Likewise, in both cases the locking can be performed with the spring pin 18 shown enlarged in Fig. 7a, which locks in the recess 15 in the base part 2. In this way no response is required in the base part 2 and no cam 10 in the connecting and closing piece 9. its other end is connected to the pivot shaft 16, while its other end is in response to the longitudinal hole 16a.

Fig. 8 shows a catheter connection head in which the closing part of the duct 5 after the puncturing step is denoted by 19. Until the puncture cannula, not shown in the figure, is inserted, the closing part 19, the roller or ball 20 is locked in the recess 21, in the dashed position compression spring 23 in the hole 22. Only when the puncture cannula is inserted into the duct 5 does it press against the gripper 24 in the closure part 19 and thus release the closure element 19. As soon as the puncture step is completed and the puncture cannula is pulled out of the duct 5, the closure element 19 pops to a position where it is locked by a roller or ball in the recess 26. In addition to the fact that it is no longer possible to insert a puncture cannula into the duct 5, the closure element 19 simultaneously acts as part of the wall of the duct 4, so that a catheter, for example, can now be inserted through it.

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In Figures 9, 9a and 9b, a slider 27 is used as the closing element of the ducts 4 and 5, which pivots around a point 28 and is acted upon by a spring 29. When the opening in the slider 27 is at the height of the duct 5 shown in Fig. 9a, the point step can be performed. The slider 27 can also in this case be sealed with annular seals 17. The slider 27 can be locked simply by one or more expanding leaf springs 30 attached to the tip of the slider and remaining or abutting against the counter-release 31 when the slider 27 is retracted, as shown in Fig. 9a. The number 10 again denotes a cam which is in the locking position of the slider 27 against the stop 11, as shown in particular in Fig. 9b.

In Figs. 10, 10a and 10b, a shutter element 19 is formed by a rotatable plate with an eccentric hole 32. Fig. 10 has a coil spring 33 under tension, and the plate-shaped shutter element 19 can be locked in the same manner as the shutter element shown in Fig. 7a. When punktiokanyyli 6 is inserted, the lock is opened, and when the punktiokanyyli is pulled back, the coil spring rotates the disc 33 in the direction of the arrow 34 effect. In this case, the pin under the action of the compression spring 36 locks into the recess 37 in the closure element 19 automatically (Fig. 10b), so that also in this embodiment the puncture cannula no longer enters the channel and all the dangers of the previously mentioned known devices can be avoided.

The invention has numerous advantages over known catheter connection heads, in particular in terms of its simpler and substantially faster use, based on the continuous availability of the connection and closure body. In addition, one can be sure that no air bubbles or dirt can enter the blood vessel during the transition from puncture to catheterization. Treatment errors, such as "puncture" of a catheter already in place, can also be avoided.

Claims (8)

A catheter connection head comprising at least one channel in the base for connecting an infusion system, catheter or the like and a channel extending catheter insertion tube attached to the base, the front end of which extends a puncture cannula, and a closure member disposed between the two end positions and releasing the cannula and in the second extreme position closes this channel, characterized in that the catheter connection end includes a locking device (13,14,15; 1 9,23,26; 30,31; 35,36,37) for locking the closing element (9; 19, 27); to its second extreme position and that the locking device has a spring-tensioned element (13; 18; 20; 30; 36) which, in the second extreme position of the closing element, locks into the recess (15) of the closing element (9, -19.27) or the base part (2, Figs. 7a and 8); 26; 31, 37) or behind the end of the closing element (27, Fig. 9a). Catheter connection head according to claim 1, characterized in that the closure element (9) has a connecting piece for a hose or syringe and is a two-arm lever, one lever arm of which acts as a spring (8) for turning the closure element (9) and when the closure element (9) is turned to its operating position, the locking device (13, 14, 15) moves to the holding position, thereby releasing the locking pin (13), which locks in the corresponding recess (15) and thus keeps the closing element (9) in the locking position (Figures 1 to 5). Catheter connection head according to Claim 1 or 2, characterized in that the closing element (9) has a cam (10) which, under the action of the spring (8), automatically presses towards the locking position defining stop (11) after the puncture cannula has been removed. Catheter connection head according to claim 1, characterized in that the closure element (9) is a single-arm lever with a spring (8) covered by the closure element (9), one end of which is on the pivot axis (16) of the closure element (9) and the other end of the longitudinal hole (16a). (Figures 6, 7 and 7a). Catheter connection head according to Claim 4, characterized in that when the closing element (9) is turned to the locking position, the locking device (18) in the closing element (9) locks in a recess (15) in the base part (2) (Figs. 6, 7 and 7a). . Catheter connection head according to claim 1, characterized in that inside the base part (2) there is a movable partition wall (19) which in the first locking position closes the channel (3) of the puncture cannula (6) and in the second locking position releases the channel (3) 19) is biased by a spring (25) in the direction of the first locking position, in which position the partition wall forms part of the wall of the second channel diagonally ending in the front area of the channel (3) leading to the connecting piece in the base part (2) (Fig. 8). 6 71490 Catheter connection head according to claim 1, characterized in that the closing element (27) is an L-shaped slide, the longer branch of which is resiliently hinged to the base part (2) and the free end of the second, shorter branch is guided transversely to the base part (3). 2) there is at least one elastic, expanding leaf spring (30) in the gap and at the end of the slide, which, after turning into the locking position, engages the counter-release (31) in the base part, and that the shorter arm releases the channel (3) and closes the second one leading to the connecting piece. the channel (4) and in the second end position of the slider closes the channel (3) and releases the second channel (4, Figs. 9, 9a, 9b). Catheter connection head according to Claim 1, characterized in that the closure element (19) is a plate rotatably mounted on the base part (2) with a hole (32) eccentric to the axis of the plate for inserting the puncture cannula (6) and biased by a spring (33). in such a way that, after the puncture cannula (6) has been pulled out of the hole, it turns to a position where it is no longer in contact with the channel (3) for the puncture cannula (6) (Figures 10, 10a, 10b). 8 71 490