CS261548B1 - Coupling for cannula connection to a introducing jig of biopsy sets - Google Patents

Abstract

The subject of the solution relates to the technical supplement medical and veterinary equipment ■ Techniques. The task of the solution is to speed it up and to improve the collection of macroscopic tissues of lively live crganis by swift exchange of the collection tool and its rigid as also secure clamping. The essence of the solution is oddly convert the union nut (lj and body (12J coupler, resting in that the nut (11) is provided with an outer one a slot (13) and an inner slot (14), whose side walls (23, 24) are mutually adjacent parallel and tangentially oriented to the cylindrical recesses (27) of the nut (lij, ratio of the side walls (25) to the distance of the side walls (24) is within a ratio of 1: 2 to 5: 6, with the cross-section of the central channel (16) is minimal one-seventh and the sum of radial cross-sections channels (17) is at least once one sixth of the cross-section of the cannula opening (20), allowing radial insertion of the cannula a its fast clamping in the clutch axis, mutual counterclockwise rotation of one coupling parts - nuts and bodies.

Description

2615 48

The subject of the invention is a quick coupler> a safe and rigid connector. J * ending, serving the sampling of tissues for delivery of biopsy kits. When taking tissue samples from living organisms, a hygienic, sterile instrument is needed for each organism, or each tissue harvest, to come into contact with the tissue of the living organism. This component is a cannula which is essentially truncated with a sharp, pointed tip at one end and either with a second-end design or with only a smooth cylindrical ending of the same diameter as the cannula tubing. A number of methods are known to be provided with a structurally adapted clamping end.

The most severe method of clamping cannulae at their clamped end is simply screwing into the end of the chute. The disadvantage of such connections of the insertion device and also of the insertion device is that the screwing and unscrewing of the fact that a special tool is usually needed is also necessary for the assembly and removal of the cannula.

Another method of clamping cannulas is by mounting and disassembling them with a sleeve, through which the cannula must first be threaded and securely fastened to the counter-thread of the cannula delivery device. In this way, it is also necessary to screw or unscrew the union nut, which is uneconomical.

Most preferably, the cone-like cone connection of the cannula would appear to have a loading device similar to that of the ili-l injection syringes. However, the disadvantage of such a solution lies in the fact that the self-locking conical surfaces must be kept in perfect condition and, above all, intact, for maintaining the necessary self-locking connection. Such a self-locking conical connection between each of the larger dimensions and the insertion means would not be able to provide good operational certainty and repeatability! reliability.

The above-mentioned drawbacks do not have a connector for connecting cannulas to the delivery device of the biopsy kits according to the invention, characterized in that it has a device with an outer slit, the side walls of which are parallel planes oriented tangentially to the central spindle with an inner slit whose sides are are parallel to each other, but also to the sides of the outer wall side walls, and are tangentially aligned to the cylindrical recess surface of the nut, wherein the distance of the side walls of the outer slot to the spacing of the side wall slot in the range of 1: 2 to 5: 6a cross section of the central channel in the body - the coupling is at least one seventhhole of the opening and the sum of the cross-sectional channels * of the coupling body is at least eaten. a sixth of the cross-section of the opening, the threaded pin of the body provided by the centering bolt. In particular, the advantages of the aforementioned clutch solution are the particularly short times needed to clamp or release the cannula from the insertion device, whereby only the twin-nut of the clutch and the quarter-turn and radially withdraw the cannula through the outer and inner annular of the nut are sufficient. In this connection, the connection of the cannula with the preparation is perfectly rigid, thanks to the relatively large clamping surface between the flange of the canal and the face of the recess in the union nut, to which the cannula flange presses with sufficient force the face of the clamping stud of the coupling body. The advantage of the coupling according to the invention is also the fact that the outer cylindrical surfaces of the housing and the coupling body are provided with a notch whose grooves are parallel to the couplings instead of the traditional cross-nibbling.

In the accompanying drawing, FIG. 1 shows a sectional view of a spoke according to the invention with a clamped cannula, a plane lying in the axis of the cannula, respectively. clutches.

FIG. 2 is a cross-sectional view of the coupling nut of the recess from the insertion device.

FIG. 3 is an alternative view of the clamp threaded pin.

The coupling nut 11 is essentially a modified nut fitted to the insertion of the cannula 18 into the coupling by a radially inwardly slotted slot 14 through which the flange is inserted and through the outer slot 13 through which the expanded portion or portions engage. The cannula pin 18 protrudes from the central hole of the nut 11 and the threaded hole located on the opposite side of the nut 11 serves to connect the coupling 11 with the coupling body 12 or the coupling body 12. with a male threaded pin 23. In the coupling axis 26, which is also the axis of the clamping bolt 23, a central channel 16 is provided for the discharge of compressed air at the entrance of the tissue into the opening 20 of the cannula 18. The flange portion of the cannula 18 is in contact with the bottom 21 of the recess 27 and the other side with the face 15, or with the centering projection 28 of the clamping threaded pin 23 of the clutch body 12. The central channel 16 is connected to a set of radial channels 17 extending perpendicularly to the coupling axis 26, which is also the axis of the central channel 16, in the widest parts of the coupling body 12 provided circumferentially with the notch 19. 19, the circumference of the nut 11 is provided. The notch grooves 19 are parallel to the coupling axis 26. Termination of nut 11 returned to clutch body 12 is named 22 of nut 11. External slot 13

Claims (3)

8, 261548, the nut 11 is delimited by the walls 25 and the inner slot 14 is delimited by the walls 24. Handling of the cannula 18 and the clutch follows. After inserting the cannula 18 into the nut11 radially over the outer slot 13 and the inner slot 14, the maitica 11 and the clutch body 12 are gripped by the outer, serrated 13 circumference and rotate relative to each other until the face 15 of the threaded bolt 23 moves to the cannula flange 18 and it is firmly pressed to the bottom 21 of the recess 27 of the nut 11. Thus, the cannula 18 is rigidly connected to the connector, which is connected by the connecting threaded pin 23 to the delivery device of the biopsy device, not shown in FIG. and air, located in the cannula 18, escapes the central channel 18 and the radial channel system 17 into the vicinity. Since the cannula 18 is introduced into the body and its extraction takes place in fractions of a second, it is very important that the air escaping from the opening 20 cannula 18 is not throttled, eventually under-channeled by the cross-sections of the channels, whether the central channel 16 or the radial channels. the nut 11 and the coupling body 12 with the grooves parallel to the coupling axis 26 allow for simple and complete cleaning of the coupling or the coupling. bioptickésúpravy. After obtaining the tissue sample, after the sample has been taken in the opening 20 of the cannula 18, the nut 11a of the clutch body 12 is unscrewed from each other and the cannula 18 can be conveniently lifted from the outside of the slot 13, respectively. Instead, a new 18 cannula is clamped into the clutch and the tissue sample can be collected at another site. The implementation of the centering projection 28 on the clamping pin 23 of the coupling body 12 reduces the possibility of incorrect clamping of the cannula 18. PEEDMET A connector for connecting cannulas to a delivery device of biopsy kits comprising a nut and a body, characterized in that it is provided with a nut (11) with an outer slot (13), the side walls (25) of which are parallel planes oriented in an angular manner to centrally drill the nut (11) with the inner slit (14), which side walls (24) are parallel to each other, but also with the sides of the side walls (25) of the outer slot (13) and are tangential to the cylindrical surface of the recess (27) ) a nut (11), wherein the spaced apart side walls (25) of the outer slot (13) are spaced apart from the side walls (24) of the inner slot (14) by a range of 1: 2 to 5: 6 and a cross section of the center ka the channel (16) in the coupling body (12) is at least one-seventh of the cross-section of the opening (20) of the channel (18) and the sum of the cross-sections of the radial channels (17) in the coupling body (12) is at least one-sixth of the opening cross-section ( 20) kaynes (18). A coupling according to claim 1, characterized in that the outer cylindrical surfaces of the coupling body (12) and the nut (11) are provided with a notch (19) whose grooves are parallel to the coupling axis (26). A clutch according to claim 1, characterized in that the clutch body (12) is provided with a projection (28) on the side of the end (15) of the threaded pin (23). 1 sheet of drawings