A subtrochanteric transverse osteotomy positioning guide

Abstract

The present invention discloses a subtrochanteric transverse osteotomy positioning guide, comprising a bone holding forceps and a positioning guide body, wherein the bone holding forceps comprises two pliers handles and a positioning device, wherein the two pliers handles are hinged by a pin shaft; the positioning guide body comprises a U-shaped piece and a clamping piece, wherein the U-shaped piece is formed by connecting a cross bar and two vertical bars, wherein a first osteotomy guide groove extending front to back is provided on the cross bar; a second osteotomy guide groove extending front to back is provided on the transverse portion of the clamping piece, wherein two positioning holes extending up and down are provided on the transverse portion of the clamping piece, wherein the two positioning holes are respectively arranged on both sides of the second osteotomy guide groove; the two vertical bars of the U-shaped piece are plugged into the two positioning holes one by one, and each vertical bar is fixed in the corresponding positioning hole by a bolt. The subtrochanteric transverse osteotomy positioning guide of the present invention can be fixed to the femoral shaft, locate the osteotomy distance and control the osteotomy direction at both ends of the shortened osteotomy, so that the two osteotomy ends remain parallel, which is convenient for the osteotomy to be aligned and conducive to later healing.

Description

Technical Field

[0001] The invention relates to a subtrochanteric transverse osteotomy positioning guide. Background Art

[0002] Subtrochanteric osteotomy is a commonly used procedure for total hip replacement in patients with high dislocation and congenital hip dysplasia. It can assist in joint reduction and effectively reduce the incidence of vascular and nerve traction loss during reduction. Among them, transverse osteotomy is one of the common methods of subtrochanteric osteotomy. Previously, surgeons relied on visual estimation or manual marking by electric knife for osteotomy positioning, which easily resulted in the osteotomy lines at both ends of the shortening osteotomy not being parallel and the distance between the osteotomy positions being difficult to determine. This resulted in poor control of the shortening length and the inability to completely align the two ends of the osteotomy, affecting the reduction of the osteotomy ends and the healing of the osteotomy sites. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a subtrochanteric transverse osteotomy positioning guide that can be fixed to the femoral shaft to control the shortening osteotomy position, distance and osteotomy direction at both ends, so that the two osteotomy ends remain parallel, which is convenient for the osteotomy to align and is conducive to later healing.

[0004] The technical solution to achieve the above object is: a subtrochanteric transverse osteotomy positioning guide, comprising a bone holding forceps and a positioning guide body, wherein:

[0005] The bone holding forceps include two pliers handles and a positioning device, the two pliers handles are hinged by a pin shaft, one end of each pliers handle is provided with an arc-shaped pliers head, the other end of each pliers handle is provided with a finger ring, the arc-shaped pliers heads of the two pliers handles are arranged facing each other, and the facing surfaces of the arc-shaped pliers heads of the two pliers handles are respectively provided with locking teeth; the positioning device includes a nut and a stud, a threaded hole that passes through the front and back of one of the pliers handles is opened, the stud passes through the threaded hole and is connected to the other pliers handle, and the nut is arranged on the stud;

[0006] The positioning guide body includes a U-shaped piece and a clamping piece, the U-shaped piece is connected by a cross bar and two vertical bars, the cross bar is provided with a first osteotomy guide groove running through the front and back, and one of the vertical bars is provided with a scale line; the clamping piece is connected by a cross portion and a longitudinal portion to form an L shape, and the longitudinal portion of the clamping piece is connected to the pin shaft; the cross portion of the clamping piece is provided with a second osteotomy guide groove running through the front and back, and the cross portion of the clamping piece is provided with two positioning holes running through the top and bottom, 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 piece are inserted into the two positioning holes one by one, and each vertical bar is fixed in the corresponding positioning hole by a bolt.

[0007] In the above-mentioned subtrochanteric transverse osteotomy positioning guide, the stud is located between the pin and the finger ring.

[0008] In the above-mentioned subtrochanteric transverse osteotomy positioning guide, the positioning guide body and the positioning device are located on the same side of the bone holding forceps.

[0009] In the above-mentioned subtrochanteric transverse osteotomy positioning guide, a bolt mounting hole that passes through the hole wall of each positioning hole is opened, and the bolt is fixed to the corresponding vertical rod after passing through the bolt mounting hole.

[0010] In the above-mentioned subtrochanteric transverse osteotomy positioning guide, the longitudinal portion of the clamping piece is welded to the pin shaft.

[0011] In the above-mentioned subtrochanteric transverse osteotomy positioning guide, the longitudinal portion of the clamping member is connected to the pin shaft through a connecting rod.

[0012] In the above-mentioned subtrochanteric transverse osteotomy positioning guide, the cross-sectional shape of the positioning hole is matched with the cross-sectional shape of the vertical rod.

[0013] In the above-mentioned subtrochanteric transverse osteotomy positioning guide, the first osteotomy guide groove and the second osteotomy guide groove are parallel to each other.

[0014] The subtrochanteric transverse osteotomy positioning guide of the present invention can be fixed to the femoral shaft to control the shortening osteotomy position, distance and osteotomy direction at both ends, so that the two osteotomy ends remain parallel, which is convenient for the osteotomy site to align and is beneficial to later healing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the subtrochanteric transverse osteotomy positioning guide of the present invention;

[0016] Figure 2 It is an exploded structural diagram of the subtrochanteric transverse osteotomy positioning guide of the present invention;

[0017] Figure 3 It is a front view of the subtrochanteric transverse osteotomy positioning guide of the present invention. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the specific implementation methods thereof are described in detail below in conjunction with the accompanying drawings:

[0019] See also Figure 1 , Figure 2 and Figure 3 The best embodiment of the present invention is a subtrochanteric transverse osteotomy positioning guide, which includes a bone holding forceps 1 and a positioning guide body 2.

[0020] The bone holding forceps 1 include two handles 11 and a positioning device. The two handles 11 are hinged by a pin 12. An arc-shaped clamp head 13 is provided at one end of each handle 11, and a finger ring 14 is provided at the other end of each handle 11. The arc-shaped clamp heads 13 of the two handles 11 are arranged opposite to each other, and locking teeth 15 are respectively provided on the facing surfaces of the arc-shaped clamp heads 13 of the two handles 11; the positioning device includes a nut 16 and a stud 17. A threaded hole that passes through the front and back is opened on one handle 11, and the stud 17 passes through the threaded hole and is connected to the other handle 11. The nut 16 is arranged on the stud 17, and the stud 17 is located between the pin 12 and the finger ring 14.

[0021] 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. The cross bar 211 is provided with a first osteotomy guide groove 23 that runs through the front and back, and one of the vertical bars 212 is provided with a scale line; the clamping member 22 is connected to form an L-shape by a transverse portion 221 and a longitudinal portion 222. The longitudinal portion 222 of the clamping member 22 is connected to the pin 12, preferably by welding. The longitudinal portion of the clamping member 22 and the pin 12 can also be connected by a connecting rod; the transverse portion 221 of the clamping member 22 is provided with a first osteotomy guide groove 23 that runs through the front and back, and one of the vertical bars 212 is provided with a scale line; A second osteotomy guide groove 24 is provided which is through front and back, and two positioning holes 223 which are through up and down are provided on the transverse part 221 of the clamping member 22, and the two positioning holes 223 are respectively provided on both sides of the second osteotomy guide groove 24; the two vertical rods 212 of the U-shaped member 21 are plugged into the two positioning holes 223 in a one-to-one correspondence, and a bolt installation hole which is through front and back is provided on the hole wall of each positioning hole 223, and the bolt 25 is fixed with the corresponding vertical rod 212 after passing through the bolt installation hole, so that each vertical rod 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 rod 212, for example, when the cross-sectional shape of the vertical rod 212 is trapezoidal, the cross-sectional shape of the positioning hole 223 is also trapezoidal, so that the vertical rod 212 can be easily moved in the positioning hole 223.

[0022] The positioning guide body 2 and the positioning device are located on the same side of the bone clamp 1. The first osteotomy guide groove 23 and the second osteotomy guide groove 24 are parallel to each other.

[0023] When using the subtrochanteric transverse osteotomy positioning guide of the present invention, the nut 16 is first loosened, and the clamp handle 11 with a threaded hole is pulled outward along the stud 17 to open the two arc-shaped clamp heads 13, and the two arc-shaped clamp heads 13 are clamped on the femoral shaft, and then the nut 16 is tightened, and the two vertical rods 212 of the U-shaped member 21 are plugged into the two positioning holes 223 one by one, and the distance between the first osteotomy guide groove 23 and the second osteotomy guide groove 24 is adjusted by the scale line on the vertical rod 212, that is, the shortened osteotomy distance, which can be used to control the shortened osteotomy length, and solve the problem of the current osteotomy length control being manually measured after the ruler is used. Marking, control inaccuracy problem, then each vertical rod 212 is fixed in the corresponding positioning hole by a bolt 25, so that the distance between the first osteotomy guide groove 23 and the second osteotomy guide groove 24 is determined, and the bone can be cut after the blade passes through the first osteotomy guide groove 23 and the second osteotomy guide groove 24. In this way, since the first osteotomy guide groove 23 and the second osteotomy guide groove 24 are parallel to each other, the two osteotomy ends can be controlled to be parallel, which solves the problem that the current positioning mostly relies on visual estimation by naked eyes or manual marking by electric, etc., which is prone to the problem that the osteotomy lines at both ends of the shortened osteotomy are not parallel, which is convenient for the osteotomy to be aligned and is conducive to later healing.

[0024] In summary, the subtrochanteric transverse osteotomy positioning guide of the present invention can be fixed to the femoral shaft to control the shortening osteotomy position, distance and osteotomy direction at both ends, so that the two osteotomy ends remain parallel, which is convenient for the osteotomy to align and is beneficial to later healing.

[0025] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or 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 include two pliers handles and a positioning device, the two pliers handles are hinged by a pin shaft, one end of each pliers handle is provided with an arc-shaped pliers head, the other end of each pliers handle is provided with a finger ring, the arc-shaped pliers heads of the two pliers handles are arranged facing each other, and the facing surfaces of the arc-shaped pliers heads of the two pliers handles are respectively provided with locking teeth; the positioning device includes a nut and a stud, a threaded hole that passes through the front and back of one of the pliers handles is opened, the stud passes through the threaded hole and is connected to the other pliers handle, and the nut is arranged on the stud; The positioning guide body includes a U-shaped piece and a clamping piece, the U-shaped piece is connected by a cross bar and two vertical bars, the cross bar is provided with a first osteotomy guide groove running through the front and back, and one of the vertical bars is provided with a scale line; the clamping piece is connected by a cross portion and a longitudinal portion to form an L shape, and the longitudinal portion of the clamping piece is connected to the pin shaft; the cross portion of the clamping piece is provided with a second osteotomy guide groove running through the front and back, and the cross portion of the clamping piece is provided with two positioning holes running through the top and bottom, 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 piece are inserted into the two positioning holes one by one, and each vertical bar is fixed in the corresponding positioning hole by a bolt.

2. A subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that: The stud is located between the pin and the finger ring.

3. A subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that: The positioning guide body and the positioning device are located on the same side of the bone clamp.

4. A subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that: A bolt installation hole that passes through the front and back is opened on the hole wall of each positioning hole. The bolt is fixed to the corresponding vertical rod after passing through the bolt installation hole.

5. The subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that: The longitudinal portion of the clamping member is welded to the pin shaft.

6. A subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that: The longitudinal portion of the clamping member is connected to the pin shaft via a connecting rod.

7. The subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that: The cross-sectional shape of the positioning hole matches the cross-sectional shape of the vertical rod.

8. The subtrochanteric transverse osteotomy positioning guide according to claim 1, characterized in that: The first osteotomy guide groove and the second osteotomy guide groove are parallel to each other.

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