Sawtooth half sleeve

Abstract

The utility model relates to orthopedics medical instrument technical field especially sawtooth half sleeve. The half sleeve includes half sleeve and handle, and the half sleeve includes tip, multistage sawtooth structure and half sleeve main part, and the tip is gradually expanded from left to right smoothly, and the width between multistage sawtooth structure is increasing from left to right, and the half sleeve main part is'U' elongated from left to right, handle is set up in the right end of half sleeve main part. The utility model takes minimally invasive surgery as application scene, through the shape design of half sleeve, can block the exit root, reduced the possible of nerve injury, improved the security of operation, in operation through rotating half sleeve, through tip and multistage sawtooth structure enter in turn, enlarge the intervertebral space, multistage sawtooth structure can gradually expand the opening, realize the controllable regulation of intervertebral space, solved the problem of large interbody fusion cage implantation under the condition of unable to enlarge intervertebral space in minimally invasive surgery, half sleeve can provide implantation guiding positioning in operation, improved the accuracy of interbody fusion cage placement.

Description

Technical Field

[0001] This utility model relates to the field of orthopedic medical device technology, and in particular to a serrated half-sleeve. Background Technology

[0002] In spinal surgery, tools are often needed to open the intervertebral space in order to implant an intervertebral fusion cage. Existing tools for opening the intervertebral space have several shortcomings in practical use, such as the inability to progressively enlarge the intervertebral space opening, making it difficult to controllably adjust the intervertebral space and increasing the difficulty of implanting large intervertebral fusion cages. Utility Model Content

[0003] The purpose of this invention is to provide a serrated semi-sleeve that overcomes the shortcomings of the prior art. It can achieve progressively larger intervertebral space openings using the same tool, enabling controllable adjustment of the intervertebral space and solving the problem of implanting large intervertebral fusion devices.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A serrated semi-cannula includes a semi-cannula and a handle. The semi-cannula comprises, from left to right, a tip, a multi-segment serrated structure, and a main body. The tip smoothly widens from left to right, the width of the multi-segment serrated structures increases from left to right, and the main body extends in a "U" shape from left to right. The handle is located at the right end of the main body. During use, the shape of the semi-cannula blocks the exit root, reducing the possibility of nerve damage and improving surgical safety. During the procedure, the semi-cannula is rotated and inserted sequentially through the tip and multi-segment serrated structure to enlarge the intervertebral space. The multi-segment serrated structure can progressively enlarge the opening, achieving controllable adjustment of the intervertebral space. This solves the problem of implanting large intervertebral fusion cages in minimally invasive surgery where it is impossible to enlarge the intervertebral space.

[0006] Furthermore, the left end of the semi-sleeve body, the upper end face of the multi-segment serrated structure, and the upper end face of the tip form a smooth oblique cut structure, which facilitates the operation of the tip and the multi-segment serrated structure to expand the intervertebral space.

[0007] Furthermore, the length of the tip is n, the distance between the tip end and the first serrated structure is m, and the distance between two adjacent serrated structures is also m, where n and m are both greater than 0. By setting different dimensions for the tip and each serrated structure, the opening size during intervertebral space expansion is quantified in real time, providing a reference for the selection of interbody fusion devices and simplifying the surgeon's operation. In addition, through the above design, the semi-cannula can provide implantation guidance and positioning during the operation, improving the accuracy of interbody fusion device placement.

[0008] Furthermore, the surfaces of the tip, the multi-segment serrated structure, and the half-tube body are all polished, improving safety during use.

[0009] Furthermore, a U-shaped groove is provided on the upper end face of the handle, and the right end of the half-sleeve body is accommodated in the U-shaped groove. In order to ensure a stable connection between the handle and the half-sleeve body, a welding method can be used for connection.

[0010] Furthermore, the handle comprises a first handle segment and a second handle segment from top to bottom. The first handle segment is perpendicular to the half-sleeve body or at an angle α, where α = 85-95°. The angle between the first handle segment and the second handle segment is 170-178° in the direction away from the half-sleeve. This angle setting facilitates better force application during use of the serrated half-sleeve.

[0011] Furthermore, the average width of the second handle segment is greater than that of the first handle segment; the second handle segment has a ring structure with wavy edges, which facilitates the application of grip force to the handle and improves the comfort of holding the handle.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, the serrated half-cannula of this utility model has the following advantages: It is designed for minimally invasive surgery, and its function is to progressively expand the intervertebral space, accurately control the size of the intervertebral space, and place the intervertebral fusion cage. During use, the shape design of the half-cannula can block the exit root, reducing the possibility of nerve damage and improving the safety of the surgery. During the operation, the half-cannula is rotated and inserted sequentially through the tip and multi-segment serrated structure to expand the intervertebral space. The multi-segment serrated structure can progressively expand the opening, achieving controllable adjustment of the intervertebral space. This solves the problem of implanting large intervertebral fusion cages in minimally invasive surgery where it is impossible to expand the intervertebral space. In addition, by setting different dimensions for the tip and each segment of the serrated structure, the opening size during intervertebral space expansion is quantified in real time, providing a reference for the selection of the intervertebral fusion cage, simplifying the surgeon's operation. The half-cannula can provide implantation guidance and positioning during the operation, improving the accuracy of intervertebral fusion cage placement. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the semi-sleeve structure of this utility model;

[0015] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the I region structure;

[0016] Figure 4 This is a schematic diagram of the handle structure of this utility model;

[0017] The components include: 1 half-sleeve, 101 tip, 102 serrated structure, 103 half-sleeve body, 2 handle, 201 "U" shaped groove, 202 first handle section, and 203 second handle section. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0019] like Figure 1-4 In the illustrated embodiment, a serrated semi-cannula includes a semi-cannula 1 and a handle 2. The semi-cannula 1, from left to right, comprises a tip 101, a multi-segment serrated structure 102, and a semi-cannula body 103. The tip 101 smoothly expands from left to right, the width of the multi-segment serrated structures 102 increases from left to right, and the semi-cannula body 103 extends in a "U" shape from left to right. The handle 2 is located at the right end of the semi-cannula body 103. During use, the shape design of the semi-cannula 1 can block the exit root, reducing the possibility of nerve damage and improving surgical safety. During the procedure, by rotating the semi-cannula 1, it sequentially enters through the tip 101 and the multi-segment serrated structure 102, expanding the intervertebral space. The multi-segment serrated structure 102 can progressively expand the opening, achieving controllable adjustment of the intervertebral space. This solves the problem of implanting large intervertebral fusion devices in minimally invasive surgery when the intervertebral space cannot be expanded.

[0020] In this embodiment, the left end of the semi-sleeve body 103, the upper end face of the multi-segment serrated structure 102, and the upper end face of the tip 101 form a smooth oblique cut structure, which facilitates the operation of the tip 101 and the multi-segment serrated structure 102 to expand the intervertebral space. The surfaces of the tip 101, the multi-segment serrated structure 102, and the semi-sleeve body 103 are all polished, which improves the safety during use.

[0021] In this embodiment, the tip 101 is 6mm long, the distance between the end of the tip 101 and the first serrated structure 102 is 2mm, and the distance between two adjacent serrated structures 102 is also 2mm. By setting different dimensions for the tip 101 and each serrated structure 102, the opening size during intervertebral space expansion is quantified in real time, providing a reference for the selection of intervertebral fusion devices and simplifying the operator's operation.

[0022] In this embodiment, a U-shaped groove 201 is provided on the upper surface of the handle 2, and the right end of the half-sleeve body 103 is accommodated in the U-shaped groove 201. To ensure a stable connection between the handle 2 and the half-sleeve body 103, a welding method can be used for connection. The handle 2 includes a first handle segment 202 and a second handle segment 203 from top to bottom. The first handle segment 202 is perpendicular to the half-sleeve body 103. The included angle between the first handle segment 202 and the second handle segment 203 is 175° in the direction away from the half-sleeve 1. This angle setting facilitates better force distribution during use of the serrated half-sleeve 1. The average width of the second handle segment 203 is greater than the average width of the first handle segment 202. The second handle segment 203 has a ring structure with wavy edges. This shape setting facilitates the application of grip force to the handle 2 and improves the comfort of holding the handle 2.

[0023] The above-described specific embodiments are merely specific examples of this utility model. The patent protection scope of this utility model includes, but is not limited to, the product form and style of the above-described specific embodiments. Any appropriate changes or modifications made by a person skilled in the art that conform to the claims of this utility model should fall within the patent protection scope of this utility model.

Claims

1. A sawtooth half-bush characterised in that: The device includes a half-sleeve and a handle, wherein: the half-sleeve comprises, from left to right, a tip, a multi-segment serrated structure and a half-sleeve body, the tip gradually widens smoothly from left to right, the width of the multi-segment serrated structure increases from left to right, and the half-sleeve body extends in a "U" shape from left to right; the handle is located at the right end of the half-sleeve body.

2. A sawtooth half bush according to claim 1, characterised in that: The left end of the semi-sleeve body, the upper end face of the multi-segment serrated structure, and the upper end face of the tip form a smooth oblique cut structure.

3. A sawtooth half bushing according to claim 1, characterized in that: The length of the tip is n, the distance between the tip end and the first serrated structure is m, and the distance between two adjacent serrated structures is also m, where n and m are both greater than 0.

4. A sawtooth half bushing according to claim 1, characterized in that: The surfaces of the tip, the multi-segment serrated structure, and the half-tube body are all polished.

5. A sawtooth half bush according to claim 1, characterised in that: The upper surface of the handle is provided with a "U" shaped groove, and the right end of the half-sleeve body is accommodated in the "U" shaped groove.

6. A sawtooth half bush according to claim 1, characterised in that: The handle comprises a first handle segment and a second handle segment from top to bottom, with the first handle segment and the second handle segment set at an angle to each other.

7. A sawtooth half bush according to claim 6, wherein: The first handle segment is perpendicular to the half-sleeve body, or at an angle α, where α = 85-95°.

8. A sawtooth half bush according to claim 6, wherein: The included angle between the first and second segments is 170-178° in the direction away from the half-sleeve.

9. A sawtooth half bush according to claim 6, wherein: The average width of the second handle segment is greater than the average width of the first handle segment.

10. A sawtooth half bush according to claim 9, characterised in that: The second handle section has a ring structure with wavy edges.

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