Depth-limiting acetabulum fixing drag hook

Abstract

The depth-limiting fixed acetabulum drag hook comprises a drag hook handle part, the drag hook handle part is of an arc-shaped structure, a limiting seat is fixed to the end of the drag hook handle part, a fixing needle is fixed to the bottom end of the limiting seat, and the fixing needle extends downwards; in conclusion, the insertion depth of the fixing needle is controlled through the limiting base, deep tissue damage caused by too deep insertion can be effectively avoided, the fixing needle is allowed to be firmly fixed to the bone through the design of the fixing needle, and therefore the requirement for hand power of an operator is met, and the operation process is more stable and controllable; the arc-shaped structure of the handle part of the retractor conforms to the human engineering principle, so that the fatigue feeling of an operator during long-time operation can be relieved; the problems existing in an existing tool are solved, some innovative elements such as a depth limiting mechanism and a detachable fixing needle design are introduced, and the quality and safety of an operation can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a depth-limiting fixed acetabulum retractor. Background Art

[0002] Currently, there are few tools for acetabulum exposure in orthopedic surgery. Usually, a Hoffman retractor is used to pull the soft tissue apart, or a Kirschner wire is fixed to the acetabulum to block the soft tissue to expose the acetabulum. The Hoffman retractor needs to be pulled manually when in use, and the Kirschner wire has no depth limit when inserted, which can easily damage deep tissue. Summary of the invention

[0003] The present invention aims to provide a limited depth fixed acetabular retractor to solve the technical problems that the existing acetabular exposure tools for orthopedic surgery require continuous manpower pulling and the Kirschner wire has no depth limit, which makes it easy to injure deep tissues.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The invention discloses a depth-limited acetabular retractor, comprising a retractor handle part, which is an arc-shaped structure. A limiting seat is fixed at the end of the retractor handle part, a fixing pin is fixed at the bottom end of the limiting seat, and the fixing pin is extended downward.

[0006] Furthermore, the fixing needle is fixed to the bottom end of the limiting seat by a detachable structure.

[0007] Furthermore, a socket is provided in the center of the limit seat, a ring edge is provided in the middle of the fixing needle, a threaded hole is provided in the upper part of the fixing needle, the upper part of the fixing needle is inserted into the socket of the limit seat, and a bolt is threadedly installed in the threaded hole of the fixing needle, and a gasket is mounted on the bolt.

[0008] Furthermore, the insertion hole is a spline hole, and the upper part of the fixing needle is a spline structure.

[0009] Furthermore, the length of the fixing needle is 1.5 cm, and the length of the retractor handle is 20-30 cm.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention controls the insertion depth of the fixing needle through the limit seat, which can effectively avoid deep tissue damage caused by too deep insertion. The design of the fixing needle allows it to be firmly fixed on the bone, thereby releasing the manual force requirements of the surgeon, making the operation process smoother and more controllable; considering the characteristics of the fixing needle as a consumable part, a detachable structure is designed to facilitate the replacement of worn parts, extend the service life of the entire tool, and also reduce maintenance costs; the combination of the spline hole and the spline structure can not only prevent the rotation of the fixing needle in the jack, but also enhance the stability of the fixing needle, further improving the safety and accuracy of the operation; the arc structure of the retractor handle conforms to the ergonomic principles, which helps to reduce the fatigue of the surgeon during long-term operation. In short, the present invention not only solves the problems existing in the existing tools, but also introduces some innovative elements, such as the depth limit mechanism and the detachable fixing needle design, which help to improve the quality and safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 It is a schematic structural diagram of the acetabulum retractor with limited depth fixation according to the present invention;

[0013] Figure 2 This is an exploded view of a depth-limiting acetabular retractor according to another embodiment of the present invention. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] The present invention is further described in detail below in conjunction with embodiments.

[0016] like Figure 1 As shown, a specific embodiment of a depth-limited acetabular retractor provided by the present invention is as follows:

[0017] The depth-limited acetabular retractor comprises a retractor handle portion 1, which is an arc-shaped structure. A limiting seat 2 is fixed at the end of the retractor handle portion 1, and a fixing needle 3 is fixed at the bottom end of the limiting seat 2. The fixing needle 3 is extended downward; the length of the fixing needle 3 is 1.5 cm, and the length of the retractor handle portion 1 is 20-30 cm.

[0018] When the depth-limited acetabulum retractor of the present invention is in use, the limiting seat 2 is struck so that the fixing needle 3 penetrates into the bone through the tip. The limiting seat 2 can limit the penetration depth to avoid damaging deep tissues. After the fixing needle 3 penetrates into the bone, it can be firmly fixed, freeing up manpower, and the retractor handle 1 can block the soft tissue on one side to fully expose the acetabulum.

[0019] In addition, the fixing needle 3 is a wearing part and will be worn after long-term use. Therefore, the fixing needle 3 is fixed to the bottom end of the limit seat 2 by a detachable structure, and the fixing needle 3 can be replaced by the detachable structure. The detachable structure is as follows: Figure 2 As shown, a socket 4 is provided at the center of the limit seat 2, a ring edge 5 is provided in the middle of the fixing needle 3, a threaded hole 6 is provided at the upper part of the fixing needle 3, the upper part of the fixing needle 3 is inserted into the socket 4 of the limit seat 2, and a bolt 7 is threadedly installed in the threaded hole 6 of the fixing needle 3, and a gasket 8 is mounted on the bolt 7.

[0020] The installation process of the fixing needle 3 is as follows: insert the fixing needle 3 upward into the socket 4, the ring edge 5 limits the depth of the fixing needle 3 inserted into the socket 4, then screw the bolt 7, and use the head of the bolt 7 to press the gasket 8 on the upper surface of the limit seat 2, and finally complete the installation of the fixing needle 3; in order to prevent the fixing needle 3 from rotating in the socket 4, preferably, the socket 4 is a spline hole, and the upper part of the fixing needle 3 is a spline structure 9. Through the spline cooperation, the shaking of the fixing needle 3 can be reduced.

[0021] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Acetabular retractor with limited depth, characterized by: It comprises a hook handle part, which is an arc-shaped structure. A limiting seat is fixed at the end of the hook handle part, a fixing needle is fixed at the bottom end of the limiting seat, and the fixing needle is extended downward.

2. The depth-limited acetabular retractor according to claim 1, characterized in that: The fixing pin is fixed at the bottom end of the limiting seat by adopting a detachable structure.

3. The depth-limited acetabular retractor according to claim 2, characterized in that: A socket is provided at the center of the limit seat, a ring edge is provided in the middle of the fixing pin, a threaded hole is provided on the upper part of the fixing pin, the upper part of the fixing pin is inserted into the socket of the limit seat, and a bolt is threadedly installed in the threaded hole of the fixing pin, and a gasket is mounted on the bolt.

4. The depth-limited acetabular retractor according to claim 3, characterized in that: The insertion hole is a spline hole, and the upper part of the fixing needle is a spline structure.

5. The acetabular retractor with limited depth fixation according to claim 1, characterized in that: The length of the fixing needle is 1.5 cm, and the length of the retractor handle is 20-30 cm.

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