A Subtrochanteric Transverse Osteotomy Positioning Guide
By designing a manual positioning guide for transverse osteotomy under trochantery, the problem of inaccurate control of osteotomy position, distance and direction is solved, and parallel union and healing of the osteotomy end is achieved.
Patent Information
- Application Number
- CN202010446447.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-05-25
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2040-05-25
AI Technical Summary
In subtrochanteric osteotomy surgery, it is difficult for the prior art to accurately control the position, distance and direction of the osteotomy, resulting in the osteotomy end not parallel, affecting reduction and healing.
A trochanteric positioning guide is designed, including the bone holding forceps and the positioning guide body. By rotating the sliding mechanism of the pressurized screw and the moving clamp handle, the distance of the arc claw is adjusted, and combined with the design of the U-shaped member and the clamping member, the parallel alignment of the osteotomy guide groove is achieved to ensure the parallelism of the osteotomy end.
Accurate control of the position, distance and direction of osteotomy is achieved, so that the osteotomy ends are kept parallel, which is convenient for cohesion and is conducive to later healing, and solves the problem of inaccurate control of osteotomy length and non-parallel osteotomy ends in the prior art.
Smart Images
Figure CN111449718B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a positioning guide for subtrochanteric transverse osteotomy. Background Art
[0002] Subtrochanteric osteotomy is a common surgical procedure for total hip arthroplasty in patients with high-displacement congenital hip dysplasia. It can assist joint reduction and effectively reduce the incidence of vascular and nerve traction damage during the reduction process. Among them, transverse osteotomy is one of the common methods of subtrochanteric osteotomy. Previously, surgeons often relied on visual estimation with the naked eye or manual marking with an electrocautery knife for osteotomy positioning, which easily led to situations such as non-parallel osteotomy lines at both ends of the shortened osteotomy and difficulty in determining the distance of the osteotomy position, resulting in poor control of the shortening length and incomplete alignment of the two ends of the osteotomy, affecting the reduction of the osteotomy ends and the healing of the osteotomy site. Summary of the Invention
[0003] The object of the present invention is to overcome the defects of the prior art and provide a positioning guide for subtrochanteric transverse osteotomy, which can be fixed to the femoral shaft, control the position, distance and osteotomy directions at both ends of the shortened osteotomy, keep the two osteotomy ends parallel, facilitate the alignment of the osteotomy site, and be beneficial to the subsequent healing.
[0004] The technical solution for achieving the above object is: a positioning guide for subtrochanteric transverse osteotomy, including a bone holding forceps and a positioning guide body, wherein:
[0005] The bone holding forceps includes a static forceps handle, a moving forceps handle and a rotary pressure screw. Arc-shaped claws are respectively arranged at the front ends of the static forceps handle and the moving forceps handle; the moving forceps handle is slidably arranged on the static forceps handle in the front-back direction; a threaded hole is opened at the rear end of the static forceps handle, and the rotary pressure screw is threadedly connected to the threaded hole at the rear end of the static forceps handle, and the front end of the rotary pressure screw is fixed to the rear end of the moving forceps handle;
[0006] The positioning guide body includes a U-shaped member and a clamping member. The U-shaped member is formed by connecting a cross bar and two vertical bars. A first osteotomy guide groove penetrating through in the front-back direction is opened on the cross bar, and a scale line is arranged on one of the vertical bars; the clamping member is formed by connecting a transverse portion and a vertical portion in a T shape, and the vertical portion of the clamping member is connected to the moving forceps handle; a second osteotomy guide groove penetrating through in the front-back direction is opened on the transverse portion of the clamping member, and two positioning holes penetrating through in the up-down direction are opened on the transverse portion of the clamping member, and the two positioning holes are respectively arranged on both sides of the second osteotomy guide groove; the two vertical bars of the U-shaped member are inserted into the two positioning holes in a one-to-one correspondence, and each vertical bar is fixed in the corresponding positioning hole by a bolt.
[0007] The above-mentioned subtrochanteric transverse osteotomy positioning guide, wherein two guiding grooves are provided on the static pliers handle in a front-back arrangement, two guiding screws are provided on the moving pliers handle in a front-back arrangement, the two guiding screws are inserted into the two guiding grooves in a one-to-one correspondence, and each guiding screw slides along the corresponding guiding groove; the moving pliers handle and the static pliers handle slide in cooperation through the guiding screws and the guiding grooves.
[0008] The above-mentioned subtrochanteric transverse osteotomy positioning guide, wherein a pair of symmetrically arranged arc-shaped claws are provided at the front end of the static pliers handle; an arc-shaped claw is provided at the front end of the moving pliers handle.
[0009] The above-mentioned subtrochanteric transverse osteotomy positioning guide, wherein the transverse part of the clamping member and the cross bar of the U-shaped member are respectively arranged on both sides of the bone holding forceps, and the first osteotomy guiding groove and the second osteotomy guiding groove are parallel to each other.
[0010] The above-mentioned subtrochanteric transverse osteotomy positioning guide, wherein a bolt mounting hole penetrating through the front and back is provided on the hole wall of each positioning hole, and the bolt is fixed to the corresponding vertical rod after passing through the bolt mounting hole.
[0011] The above-mentioned subtrochanteric transverse osteotomy positioning guide, wherein the vertical part of the clamping member is welded to the moving pliers handle.
[0012] The above-mentioned subtrochanteric transverse osteotomy positioning guide, wherein the cross-sectional shape of the positioning hole is adapted to the cross-sectional shape of the vertical rod.
[0013] The subtrochanteric transverse osteotomy positioning guide of the present invention can be fixed to the femoral shaft, control the position, distance of the shortening osteotomy and the osteotomy directions at both ends, keep the two osteotomy ends parallel, facilitate the alignment of the osteotomy site, and is beneficial to the later healing. Brief Description of the Drawings
[0014] Figure 1 is a three-dimensional structure diagram of the subtrochanteric transverse osteotomy positioning guide of the present invention;
[0015] Figure 2 is a three-dimensional structure diagram of the subtrochanteric transverse osteotomy positioning guide of the present invention;
[0016] Figure 3 is a three-dimensional structure diagram of the subtrochanteric transverse osteotomy positioning guide of the present invention;
[0017] Figure 4 is an exploded structure diagram of the subtrochanteric transverse osteotomy positioning guide of the present invention;
[0018] Figure 5 is an exploded structure diagram of the subtrochanteric transverse osteotomy positioning guide of the present invention. Detailed Description of the Invention
[0019] In order to enable those skilled in the art of the present technology to better understand the technical solution of the present invention, the following will describe its specific implementation manners in detail with reference to the accompanying drawings:
[0020] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the best embodiment of the present invention, a subtrochanteric transverse osteotomy positioning guide, includes a bone holding forceps 1 and a positioning guide body 2.
[0021] The bone holding forceps 1 includes a static forceps handle 11, a moving forceps handle 12 and a rotary compression screw 13. A pair of left and right symmetric arc-shaped claws 14 are arranged at the front end of the static forceps handle 12; an arc-shaped claw 15 is arranged at the front end of the moving forceps handle 12; two guiding grooves 16 are provided on the static forceps handle 11 in a front and rear manner, and two guiding screws 17 are provided on the moving forceps handle 12 in a front and rear manner. The two guiding screws 17 are inserted into the two guiding grooves 16 in a one-to-one correspondence, and each guiding screw 17 slides along the corresponding guiding groove 16; the moving forceps handle 12 and the static forceps handle 11 are slidably matched through the guiding screws 17 and the guiding grooves 16. In this way, the moving forceps handle 12 is slidably arranged on the static forceps handle 11. A threaded hole is provided at the rear end of the static forceps handle 11, and the rotary compression screw 13 is threadedly connected to the threaded hole at the rear end of the static forceps handle 11, and the front end of the rotary compression screw 13 is fixed to the rear end of the moving forceps handle 12. By rotating the rotary compression screw 13, the moving forceps handle 12 is pushed to move back and forth, thereby adjusting the distance between the arc-shaped claw 15 and the arc-shaped claw 14, and facilitating the clamping of femoral shafts with different thicknesses.
[0022] The positioning guide body 2 includes a U-shaped member 21 and a clamping member 22. The U-shaped member 21 is formed by connecting a cross bar 211 and two vertical bars 212. A first osteotomy guide groove 23 penetrating through the front and back is formed on the cross bar 211, and a scale line is provided on one of the vertical bars 212. The clamping member 22 is formed by connecting a transverse portion 221 and a vertical portion 222 into a T shape. The vertical portion 222 of the clamping member 22 is connected to the movable pliers handle 12, preferably by welding. A second osteotomy guide groove 24 penetrating through the front and back is formed on the transverse portion 221 of the clamping member 22. Two positioning holes 223 penetrating through the up and down are formed on the transverse portion 221 of the clamping member 22, and the two positioning holes 223 are respectively arranged on both sides of the second osteotomy guide groove 24. The two vertical bars 212 of the U-shaped member 21 are respectively inserted into the two positioning holes 223. A bolt mounting hole penetrating through the front and back is formed on the hole wall of each positioning hole 223. After the bolt 25 passes through the bolt mounting hole, it is fixed to the corresponding vertical bar 212. In this way, each vertical bar 212 is fixed in the corresponding positioning hole 223 by the bolt 25. The cross-sectional shape of the positioning hole 223 is adapted to the cross-sectional shape of the vertical bar 212. For example, when the cross-section of the vertical bar 212 is trapezoidal, the cross-section of the positioning hole 223 is also trapezoidal, which is convenient for the vertical bar 212 to move in the positioning hole 223.
[0023] The transverse portion 221 of the clamping member 22 and the cross bar 211 of the U-shaped member 21 are respectively arranged on both sides of the bone holding forceps 1, and the first osteotomy guide groove 23 and the second osteotomy guide groove 24 are parallel to each other.
[0024] When the subtrochanteric transverse osteotomy positioning guide of the present invention is in use, by rotating the rotary compression screw 13, the movable pliers handle 12 is pushed to move back and forth, thereby adjusting the distance between the arc-shaped claws 15 and the arc-shaped claws 14, facilitating the clamping of femoral shafts of different thicknesses. The two vertical bars 212 of the U-shaped member 21 are respectively inserted into the two positioning holes 223. The distance between the first osteotomy guide groove 23 and the second osteotomy guide groove 24 is adjusted through the scale line on one of the vertical bars 212, which is the shortening osteotomy distance and can be used to control the shortening osteotomy length, solving the problem that the current osteotomy length control depends on manual marking after ruler measurement and the control is inaccurate. Then each vertical bar 212 is fixed in the corresponding positioning hole by the bolt 25. In this way, the distance between the first osteotomy guide groove 23 and the second osteotomy guide groove 24 is determined. After the blade passes through the first osteotomy guide groove 23 and the second osteotomy guide groove 24, the bone can be cut off. In this way, since the first osteotomy guide groove 23 and the second osteotomy guide groove 24 are parallel to each other, the parallelism of the two osteotomy ends can be controlled, solving the problem that the current positioning mostly relies on visual estimation by the naked eye or electrical to manual marking, etc., and it is easy to have non-parallel osteotomy lines at both ends of the shortening osteotomy, facilitating the alignment of the osteotomy site and being beneficial to the later healing.
[0025] In summary, the subtrochanteric transverse osteotomy positioning guide of the present invention can be fixed to the femoral shaft, control the position, distance of the shortening osteotomy and the osteotomy directions at both ends, keep the two osteotomy ends parallel, facilitate the alignment of the osteotomy site, and is conducive to the later healing.
[0026] Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as within the scope of the spirit of the present invention, changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.
Claims
1. A subtrochanteric transverse osteotomy positioning guide, characterized in that, it includes a bone holding forceps and a positioning guide body, wherein: The bone holding forceps includes a static forceps handle, a movable forceps handle and a rotary compression screw. Arc-shaped claws are respectively arranged at the front ends of the static forceps handle and the movable forceps handle; the movable forceps handle is slidably arranged on the static forceps handle in the front-back direction; a threaded hole is opened at the rear end of the static forceps handle, and the rotary compression screw is threadedly connected to the threaded hole at the rear end of the static forceps handle, and the front end of the rotary compression screw is fixed to the rear end of the movable forceps handle; The positioning guide body includes a U-shaped member and a clamping member. The U-shaped member is formed by connecting a cross bar and two vertical bars. A first osteotomy guide groove penetrating through in the front-back direction is opened on the cross bar, and a scale line is arranged on one of the vertical bars; the clamping member is formed by connecting a transverse portion and a vertical portion in a T shape, and the vertical portion of the clamping member is connected to the movable forceps handle; a second osteotomy guide groove penetrating through in the front-back direction is opened on the transverse portion of the clamping member, and two positioning holes penetrating through in the up-down direction are opened on the transverse portion of the clamping member, and the two positioning holes are respectively arranged on both sides of the second osteotomy guide groove; the two vertical bars of the U-shaped member are inserted into the two positioning holes in a one-to-one correspondence, and each vertical bar is fixed in the corresponding positioning hole by a bolt; Two guide grooves are opened on the static forceps handle in the front-back direction, and two guide screws are arranged on the movable forceps handle in the front-back direction. The two guide screws are inserted into the two guide grooves in a one-to-one correspondence, and each guide screw slides along the corresponding guide groove; the movable forceps handle and the static forceps handle slide in cooperation through the guide screws and the guide grooves; The transverse portion of the clamping member and the cross bar of the U-shaped member are respectively arranged on both sides of the bone holding forceps, and the first osteotomy guide groove and the second osteotomy guide groove are parallel to each other.
2. The subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that, A pair of symmetrically arranged arc-shaped claws are arranged at the front end of the static forceps handle; an arc-shaped claw is arranged at the front end of the movable forceps handle.
3. The subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that, A bolt installation hole penetrating through in the front-back direction is opened on the hole wall of each positioning hole, and the bolt passes through the bolt installation hole and is fixed to the corresponding vertical bar.
4. The subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that, The vertical portion of the clamping member is welded to the movable forceps handle.
5. The subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that, The cross-sectional shape of the positioning hole is adapted to the cross-sectional shape of the vertical bar.
Citation Information
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