Transverse carpal ligament incision suite

Abstract

The utility model discloses a transverse carpal ligament incision suite which comprises a pipe sleeve and a bush-hook, the cross section of the rod portion of the pipe sleeve and the cross section of the rod portion of the bush-hook are both oval, a T-shaped guide hole is formed in the outer surface of the pipe sleeve in the length direction, the end portion of the pipe sleeve and the end portion of the bush-hook are both fixedly connected with an elbow handle portion, and the length of a long shaft, close to the other end, of the pipe sleeve is sequentially decreased. The section of the rod portion of the pipe sleeve and the section of the rod portion of the bush-hook are both arranged to be oval, so that the bush-hook can wrap the back of the pipe sleeve and does not make contact with tissue in a human body when the bush-hook stretches into the pipe sleeve, the tissue of the human body is protected, the bush-hook is turned over, the long axis length of the bush-hook coincides with the short axis length of the pipe sleeve, and then the operation of backward pulling and cutting is conducted. And normal use is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of minimally invasive surgical instruments, in particular to a transverse carpal ligament incision kit. Background Art

[0002] The prior art Chinese patent with the publication number of CN209916128U discloses a transverse carpal ligament incision kit for minimally invasive surgery, which includes a sleeve. A through hole is axially formed in the sleeve along the axial direction of the sleeve. The kit further includes a puncture needle and a hook knife respectively inserted into the through hole. The hook knife includes a blade body. One end of the blade body is provided with a handle, and the other end of the blade body is provided with a blade head. The blade head extends radially along the blade body. The cutting edge of the blade head is arranged on the side close to the handle. The cutting edge of the blade head is set as an inward concave arc-shaped cutting edge. A serrated section is arranged on the side of the blade head far from the arc-shaped cutting edge. The front end of the sleeve is provided with a conical guiding surface. A long strip-shaped notch is axially formed in the side wall of the sleeve. The notch is for the blade head to extend out of the sleeve, and the blade head is in sliding fit with the notch.

[0003] The back of the hook knife used in the above technical solution is arc-shaped to avoid damaging blood vessels or nerves when inserted. However, compared with the method of directly hiding the hook knife in the sleeve and then making the hook knife protrude when in use, there is still a certain risk of damaging blood vessels or nerves in this scheme.

[0004] Therefore, the utility model improves it. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is that: the back of the hook knife in the prior art is arc-shaped, which although reduces the possibility of damaging blood vessels or nerves to a certain extent, there is still a certain risk of damaging blood vessels or nerves.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A transverse carpal ligament incision kit includes a cannula and a hook knife. The cross-sections of the cannula and the rod part of the hook knife are both oval.

[0008] A "T"-shaped guiding hole is axially formed on the outer surface of the cannula along the length direction.

[0009] Elbow handle parts are fixedly connected to the ends of the cannula and the hook knife respectively, and the major axis lengths of the cannula near the other end position decrease in sequence.

[0010] Further, the major axis length and the minor axis length of the inner surface of the cannula are both greater than the major axis length of the outer surface of the rod part of the hook knife.

[0011] Working principle and beneficial effects: By setting the cross-sectional shapes of both the cannula and the shank of the hook knife to be oval, it is convenient for the hook knife to be wrapped by the cannula when inserted, so that it does not come into contact with the tissues in the human body, thus playing a protective role on human tissues. Flip the hook knife so that the major axis length of the hook knife coincides with the minor axis length of the cannula, and then perform the operation of pulling backward to cut. This should not be used normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. is a three-dimensional structural schematic diagram of the separation of the cannula and the hook knife of the present utility model;

[0013] Figure 2 FIG. is a structural schematic diagram of the inclined cannula of the present utility model;

[0014] Figure 3 FIG. is a front view structural schematic diagram of the cannula of the present utility model.

[0015] In the figure: 1, cannula; 2, hook knife; 3, guiding hole; 4, elbow handle part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] According to the following embodiments, the present utility model can be better understood.

[0017] The structures, ratios, sizes, etc. shown in the accompanying drawings of the specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "front", "rear", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present utility model.

[0018] As Figures 1 - 3 shown,

[0019] Embodiment

[0020] A transverse carpal ligament incision kit includes a cannula 1 and a hook knife 2. The cross-sectional shapes of both the cannula 1 and the shank of the hook knife 2 are oval. A "T"-shaped guiding hole 3 is provided on the outer surface of the cannula 1 along the length direction. Elbow handle parts 4 are fixedly connected to both ends of the cannula 1 and the hook knife 2, and the major axis lengths of the cannula 1 near the other end position gradually decrease.

[0021] In use, after placing the tube sleeve 1 in position, insert the hook knife 2 into the tube sleeve 1. When inserting, keep the major axis length of the hook knife 2 and the major axis length of the tube sleeve 1 as much as possible on the same horizontal line. When the hook knife 2 is designed, the cutting part of the hook knife 2 is on the same horizontal line as the major axis length of its rod part. Therefore, during the insertion process, the cutting part of the hook knife 2 is always inside the tube sleeve 1. When cutting, first adjust the cutting part into the guide hole 3, then flip the hook knife 2 so that the major axis length of the hook knife 2 coincides with the minor axis length of the tube sleeve 1, and then perform the operation of pulling back and cutting. The major axis length and the minor axis length of the inner surface of the tube sleeve 1 are both greater than the major axis length of the outer surface of the rod part of the hook knife 2, which is to ensure that the hook knife 2 can rotate smoothly.

[0022] In the present utility model, the cross-sections of the rod parts of the tube sleeve 1 and the hook knife 2 are both set to be elliptical, so that when inserting, the hook knife 2 can be wrapped by the tube sleeve 1 and not contact the tissues in the human body, playing a protective role for human tissues. Flip the hook knife 2 so that the major axis length of the hook knife 2 coincides with the minor axis length of the tube sleeve 1, and then perform the operation of pulling back and cutting. It should not be used normally.

Claims

1. A transverse carpal ligament incision kit, comprising a sleeve (1) and a hook knife (2), characterized in that: The cross sections of the rods of the pipe sleeve (1) and the hook knife (2) are both elliptical; A "T"-shaped guide hole (3) is formed on the outer surface of the pipe sleeve (1) along the length direction; The ends of the pipe sleeve (1) and the hook knife (2) are both fixedly connected with an elbow handle portion (4), and the major axis length of the pipe sleeve (1) near the other end decreases successively.

2. A transverse carpal ligament cutting kit according to claim 1, characterized in that: The major axis length and the minor axis length of the inner surface of the pipe sleeve (1) are both greater than the major axis length of the outer surface of the rod portion of the hook knife (2).

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