A subtrochanteric fracture reduction and fixation device

Abstract

A subtrochanteric fracture reduction and fixation device comprises a sliding rod with a polygonal cross section, a plurality of fixing pliers are arranged on the sliding rod, the fixing pliers uses a locking pin as a rotating pin, the sliding rod passes through the sliding hole of the locking pin, one end of the locking pin is an annular boss, and the conical truncated cone at the other end is threadedly connected with a locking nut, the conical truncated cone is divided into a plurality of cantilever structures in the circumferential direction, and a locking protrusion is arranged on the locking nut toward one side of the fixing pliers; the jaw width of the fixing pliers is greater than the width of the pliers handle, the inner walls of the two jaws match the outer contour of the clamped femur, and are distributed with anti-slip lines extending in the width direction, and a plurality of saw teeth are arranged at the end of the jaws in the width direction. By turning the locking nut, the relative position of the clamped femur and the sliding rod can be fixed; the jaws of the fixing pliers are convenient for entering the surgical incision and firmly clamping the femur; the plurality of fixing pliers can adjust their positions on the sliding rod to fix the relative positions between the various parts of the fractured femur, so as to facilitate the operation.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a subtrochanteric fracture reduction and fixation device. Background Art

[0002] Subtrochanteric fractures are more common in young people and are often caused by greater direct violence. Subtrochanteric fractures associated with intertrochanteric fractures can occur in osteoporotic elderly people and can be caused by minor trauma such as falling on flat ground. After a subtrochanteric fracture, the proximal end is pulled by the gluteal muscles, iliopsoas muscles and external rotator muscles to flex, abduct and externally rotate, while the distal end is displaced upward, inward and backward under the influence of the adductor muscles and the gravity of the lower limbs. When performing surgical treatment on subtrochanteric fractures, medical devices such as intramedullary nails, plates and screws are often used to reduce, correct and fix the femur. When implanting intramedullary nails, plates and screws, the femur must first be temporarily fixed, usually with bone holding forceps. However, the existing holding forceps have too narrow jaws, and one holding forceps can only clamp one side of the fracture end. To fix the fracture ends on both sides at the same time, one person needs to hold two bone holding forceps at the same time, and the stability of this fixation method is poor, and it is not easy to align and reduce the fracture ends on both sides. Summary of the invention

[0003] In order to solve the technical problem that the subtrochanteric fracture is difficult to locate, the present invention provides a subtrochanteric fracture reduction and fixation device.

[0004] The purpose of the present invention is to be achieved by adopting the following technical solutions. According to a subtrochanteric fracture reduction and fixation device proposed by the present invention, it includes a sliding rod with a polygonal cross section, a plurality of fixing pliers are distributed on the sliding rod, the fixing pliers are slidably arranged on the sliding rod through the corresponding locking pin, and the fixing pliers use the locking pin as a rotating pin, the sliding rod passes through the sliding hole matching the locking pin in the center, one end of the locking pin is an annular boss, and the conical cone at the other end is threadedly connected with a locking nut, the conical cone is divided into a plurality of cantilever structures in the circumferential direction, and a locking protrusion is arranged on the locking nut toward one side of the fixing pliers; the jaw width of the fixing pliers is greater than the width of the pliers handle, the inner walls of the two jaws match the outer contour of the clamped femur, and are distributed with anti-slip patterns extending in the width direction, and the jaw ends are provided with a plurality of serrations in the width direction.

[0005] The beneficial effects of the above technical solution are as follows: while the fixing pliers rotates around the locking pin, since the sliding holes on the sliding rod and the locking pin are polygonal, the locking pin can only slide on the sliding rod and cannot rotate, so that after the fixing pliers clamp the femur, only the locking nut needs to be turned to bend the cantilever structure inward, and the locking protrusion abuts against the pliers handle, so that the relative position of the fixing pliers and the sliding rod is fixed, and the relative position of the fixing pliers and the clamped femur is fixed, thereby fixing the relative position of the clamped femur and the sliding rod; at the same time, the jaws are relatively wide, and their inner walls match the femur and are provided with anti-slip patterns, and serrations are provided at the ends, so that the jaws of the fixing pliers can easily enter the surgical incision and firmly clamp the femur; multiple fixing pliers can be adjusted in position on the sliding rod to fix the relative positions of the various parts of the broken femur, making it convenient to perform surgery.

[0006] Furthermore, a swing shaft is arranged at a position near the locking pin on the hand grip of the fixed pliers, one end of the swing shaft is hinged on one of the pliers handles, the plane formed by the swing of the swing shaft coincides with the plane formed by the swing of the pliers handles, a fixing nut is threadedly connected on the swing shaft and passes through a long hole on the other pliers handle, and the fixing nut is located on the outer side of the pliers handle on the other side.

[0007] The beneficial effect of the above technical solution is: after the fixing forceps clamp the femur, tighten the fixing nut so that the fixing nut abuts against the outer side of the corresponding forceps handle, so that the jaws are further firmly clamped on the femur.

[0008] Furthermore, a spherical protrusion is provided at the middle position of the fixing nut near the pliers handle, the threaded hole on the fixing nut passes through the spherical protrusion, and a rounded corner is provided on the outer opening part of the long hole. When the fixing nut is pressed on the pliers handle, the spherical protrusion abuts against the rounded corner of the long hole.

[0009] The beneficial effects of the above technical solution are: the spherical protrusion matches the rounded corner of the long hole, preventing the fixing nut from sliding and making the fixing nut firmly pressed on the clamp handle.

[0010] Furthermore, the cross-section of the sliding rod is a square, and the four sides of the square protrude outward, the cross-sectional shape of the protrusion is an arc, and the diameter of the circle in which the arc is located is larger than the diameter of the circumscribed circle of the square; correspondingly, the inner cavity of the sliding hole matches the outer contour of the sliding rod, and four cantilever structures are evenly arranged on the conical frustum, and the grooves between every two adjacent cantilever structures correspond one-to-one to the four edges on the sliding rod.

[0011] The beneficial effect of the above technical solution is that each cantilever structure is pressed against the corresponding edge of the slide bar, and the cantilever structure corresponds to the edge of the slide bar one by one, so that when the fixing clamp is locked, the cantilever structure can be firmly pressed against the slide bar, so that the fixing clamp and the slide bar are firmly fixed.

[0012] Furthermore, a locking handle is provided at the outer end of the locking nut.

[0013] The beneficial effect of the above technical solution is that the locking handle makes it convenient for the operator to tighten the locking nut, so that the tightening force of the locking nut squeezes the cantilever structure, and at the same time the locking protrusion squeezes the pliers handle, so that the locking pin and the slide rod are firmly fixed.

[0014] Furthermore, the two jaws of the fixed pliers are located on the same side of the center line of the angle between the two pliers handles, and the pliers handles between the jaws and the locking pin are bent toward the same side.

[0015] The beneficial effect of the above technical solution is that the jaws are biased towards the same side, which makes it convenient for the user to observe the specific situation of the jaws clamping the bone during operation.

[0016] Furthermore, the distance between the jaws and the locking pin is smaller than the distance between the end of the grip portion on the other side of the jaw handle and the locking pin.

[0017] The beneficial effect of the above technical solution is that the lever principle is adopted so that the operator does not need to use a large force to firmly clamp the bone.

[0018] Furthermore, the width of the jaws is 3-4 cm.

[0019] The beneficial effect of the above technical solution is that the jaws are wide, so that the jaws are firmly fixed to the femur.

[0020] Furthermore, the jaws are made of elastic metal material.

[0021] The beneficial effect of the above technical solution is that when the inner wall of the jaws does not completely match the corresponding femur, the jaws can be slightly deformed by force to firmly clamp the femur.

[0022] Compared with the prior art, the invention is advantageous in that: while the fixing pliers rotates around the locking pin, since the sliding holes on the slide bar and the locking pin are polygonal, the locking pin can only slide on the slide bar and cannot rotate, so that after the fixing pliers clamp the femur, only the locking nut needs to be turned to bend the cantilever structure inward, and the locking protrusion abuts against the pliers handle, so that the relative position of the fixing pliers and the slide bar is fixed, and the relative position of the fixing pliers and the clamped femur is fixed, thereby fixing the relative position of the clamped femur and the slide bar; at the same time, the width of the jaws is relatively wide, and its inner wall matches the femur and is provided with anti-slip grooves, and serrations are provided at the end, so that the fixing pliers can easily enter the surgical incision and firmly clamp the femur; multiple fixing pliers can be adjusted on the slide bar to fix the relative positions of the various parts of the broken femur, making it convenient for surgery.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A side view of an embodiment of a subtrochanteric fracture reduction and fixation device of the present invention;

[0025] Figure 2 for Figure 1 A front view of

[0026] Figure 3 for Figure 2 A cross-sectional view of the middle locking device at the matching position with the slide bar and the fixing clamp;

[0027] Figure 4 for Figure 1 An enlarged schematic diagram of the middle locking device, the slide bar and the fixed clamp at the matching position;

[0028] Figure 5 A schematic diagram of a jaw in another embodiment of the present invention;

[0029] Figure 6 for Figure 1 An enlarged schematic diagram of the middle locking pin;

[0030] Figure 7 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0031] Figure 8 A schematic diagram of a femur clamped according to an embodiment of the present invention.

[0032] [Reference Signs]

[0033] 1-slide bar, 2-fixed pliers, 201-first pliers handle, 202-second pliers handle, 203-swing shaft, 204-long hole, 205-fixed nut, 206-spherical protrusion, 207-jaw, 208-serration, 209-anti-slip pattern, 210-rotating table, 211-hand grip, 212-swing pin, 213-swing groove, 3-locking device, 301-locking pin, 302-locking nut, 303-locking handle, 304-locking protrusion, 305-annular boss, 306-pin, 307-conical table, 308-slide hole. DETAILED DESCRIPTION

[0034] 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.

[0035] An embodiment of a subtrochanteric fracture reduction and fixation device of the present invention is as follows Figures 1 to 7 As shown, Figure 8 The fractured femoral trochanter that is repositioned and fixed in an embodiment of the present invention is shown. The embodiment comprises a slide bar 1 , a fixing clamp 2 , and a locking device 3 .

[0036] The cross section of the slide bar 1 is a square, and the four sides of the square are convex outward, the convex cross section is an arc, and the diameter of the circle where the arc is located is larger than the diameter of the circumscribed circle of the square. A plurality of fixed clamps 2 are slidably arranged on the slide bar 1, and the rotation center where the two clamp handles of the fixed clamp 2 intersect coincides with the center line of the slide bar 1. Each fixed clamp 2 is slidably arranged on the slide bar 1 through a corresponding locking device 3, and the locking device 3 can fix the fixed clamp 2 on the slide bar 1 and fix the two clamp handles of the fixed clamp relatively. In this embodiment, two fixed clamps 2 are arranged on the slide bar 1, and the two fixed clamps 2 are symmetrically arranged, and one of the fixed clamps is taken as an example for description.

[0037] The fixed pliers 2 include a first pliers handle 201 and a second pliers handle 202. A rotating table 210 is provided at the rotation center position where the two pliers handles intersect. A circular hole is provided at the center position of the rotating table 210. The locking device 3 and the slide bar 1 are jointly provided in the circular holes of the two pliers handles. The distance between the jaws 207 on each pliers handle and the center of the rotating table 210 is smaller than the distance between the end of the hand grip 211 on the other side of the pliers handle and the rotating table 210, so as to clamp the femur with less force. The thickness of the hand grip 211 is greater than the thickness of the rotating table 210. From the rotating table 210 to the hand grip 211, the thickness of the pliers handle gradually increases, and the direction of increasing thickness of the hand grip 211 is in the Figure 2 The plane shown is close to each other so that the hand grip is Figure 2 The hand grip 211 gradually overlaps when viewed from above, and the gradually increasing thickness of the hand grip reduces the pressure when the operator grips. The increasing thickness of the hand grip makes the operator exert force on the same plane when applying force, thereby increasing the strength and accuracy of clamping the bone.

[0038] A swing shaft 203 is provided at the position of the hand grip 211 of the first clamp handle 201 near the rotating table 210, and one end of the swing shaft 203 is hinged to the inner side wall of the first clamp handle 211. A swing groove 213 is provided on the inner side wall of the first clamp handle 201 at this point, and a swing pin 212 is provided in the swing groove 213. The end of the swing shaft 203 is provided in the swing groove 213, and the end is flat, and the swing pin 212 is passed through the end of the swing shaft 203. The plane where the swing range of the swing shaft 203 is located coincides with the plane where the swing range of the clamp handle of the fixed clamp 2 is located. The width of the swing groove 213 is slightly larger than the thickness of the flat part of the swing shaft 203, so that the swing shaft 203 cannot swing in other directions.

[0039] The main part of the swing shaft 203 is provided with a thread, and passes through the long hole 204 provided at the corresponding position of the second clamp handle 202. The long hole 204 extends in the length direction of the second clamp handle 202, and its width is slightly larger than the diameter of the swing shaft 203, so that the swing shaft 203 can swing in the length direction of the long hole 204. The swing shaft 203 is located on the outer part of the second clamp handle 202 and is provided with a fixing nut 205, and the outer contour of the fixing nut 205 is provided with anti-slip corrugations. After the jaws 207 of the fixed pliers 2 clamp the femur, the fixing nut 205 is screwed to press the fixing nut 205 on the outer side of the second clamp handle 202, so that the clamp handle of the fixed pliers 2 no longer swings and clamps the femur. A spherical protrusion 206 is provided at the middle position of the inner side of the fixing nut 205, and the threaded hole passes through the spherical protrusion 206. The outer edge of the corresponding long hole is provided with a rounded corner. When the fixing nut 205 is pressed on the clamp handle, the spherical protrusion 206 abuts against the rounded corner of the long hole 204.

[0040] The jaws 207 of the two clamp handles are both located on the same side of the center line of the angle between the two clamp handles of the fixed clamp 2, and the two clamp handles between the jaws 207 and the rotating table 210 are bent to the same side so that the operator's vision is not blocked when clamping the femur. The width of the jaws 207 is larger than the thickness of the clamp handle, so that when the jaws 207 clamp the femur, the contact area between the jaws 207 and the femur is increased, making the fixed clamp 2 more stable when clamping the femur. In this embodiment, the width of the jaws 207 is 3-4 cm, and the inner contour of the jaws is arc-shaped, which is convenient for matching with the outer contour of the femur. Figure 2 From the perspective of Figure 2 The width directions in the plane shown overlap, so the jaw width increases in both directions relative to the thickness of the jaw handle, but increases more in the opposite direction.

[0041] The inner contour surface of the jaws 207 is provided with anti-slip grooves 209 at the part in contact with the femur, and the direction of the anti-slip grooves 209 is parallel to the width direction of the jaws 207, so that the jaws 207 can clamp the femur. The end of the jaws 207 is provided with multiple grooves in the width direction, so that the end of the jaws 207 is divided into multiple serrations 208, and the width of the end of each serration 208 gradually decreases to zero. Since the patient needs to cut the thigh muscle after the femur fracture, the jaws are extended from the muscle incision to the inner side of the femur. If the width of the jaws 207 is only widened, it is difficult to extend due to the obstruction of the muscles. Therefore, multiple serrations 208 are provided at the end of the jaws 207 to reduce the resistance of the jaws 207 extending to the inner side of the femur.

[0042] The material of the jaws 207 can be a metal material with a certain elasticity. Although the shape of each person's femur is roughly the same, it is slightly different for each person. The jaws 207 are made of a metal material with elasticity. When the jaws 207 clamp the femur, if the inner surface of the jaws does not completely match the femur, resulting in failure to clamp the femur, a little force can be applied to slightly deform the jaws 207 so that the inner surface of the jaws 207 matches the femur as much as possible. At the same time, the deformed jaws 207 can also increase the clamping force on the femur. In another embodiment, if Figure 8 As shown in FIG. 1 , the diameter of the femur at the fracture of the femoral trochanter is uneven, and the diameter gradually decreases near the fracture. Even if the jaws 207 are slightly deformed, the femur cannot be clamped. Therefore, the shape of the jaws 207 is changed to Figure 5 The inner diameter of the cone shown in the figure also gradually decreases near the fracture when clamping the corresponding femur, and matches the outer contour of the femur at the corresponding femoral trochanter, and the rest of the structure is the same as the previous embodiment. In other embodiments of the present invention, according to the femurs at different positions clamped by the fixing clamp 2, fixing clamps 2 with different jaw shapes can be used to match the femurs at different positions.

[0043] The circular holes in the middle of the rotating truncated tables 210 of the first clamp handle 201 and the second clamp handle 202 are aligned. The locking device 3 includes a locking pin 301 and a locking nut 302. The locking pin 301 is inserted into the circular holes in the two rotating truncated tables 210 at the same time, and the locking pin 301 also serves as a rotating pin for fixing the clamp 2. A sliding hole 308 that passes through the locking pin 301 is provided at the center of the locking pin 301, and the inner contour of the sliding hole 308 matches the outer contour of the sliding rod 1. The sliding rod 1 is inserted into the sliding hole 308, and the gap between the sliding rod 1 and the sliding hole 308 is small. The locking pin 301 can slide stably on the sliding rod 1 without rotating. The middle position of the locking pin 301 is a pin column 306, and the rotating truncated table 210 is rotatably set on the pin column 306. An annular boss 305 is provided on one side of the pin 306, and the outer diameter of the annular boss 305 is larger than the outer diameter of the pin 306, so that the rotating truncated cone 210 will not fall out of the locking pin 301. A conical truncated cone 307 is provided on the other side of the pin 306, and a thread is provided on the outer contour of the conical truncated cone 307. The conical truncated cone 307 is divided into multiple parts in the circumferential direction. In this embodiment, the conical truncated cone 307 is evenly divided into four parts in the circumferential direction, and a groove is provided between each part, so that each part forms a cantilever structure, and the groove between every two cantilever structures corresponds to the four edges of the slide bar 1 one by one.

[0044] The locking nut 302 is threadedly connected to the conical cone 307, and the internal thread of the locking nut 302 matches the thread on the conical cone 307. The outer end of the locking nut 302 is provided with a locking handle 303, and the inner end of the locking nut 302 is provided with a locking protrusion 304. After the two clamp handles are sleeved on the pin 306, the locking nut 302 is threadedly connected to the conical cone 307. When the locking nut 302 is in the initial position, the locking nut 302 is in a loosened state, the cantilever structure on the conical cone 307 does not bend inward, the locking protrusion 304 blocks the outer side of the clamp handle, and there is a gap between the locking protrusion 304 and the clamp handle, so that the locking pin 301 can slide on the slide bar 1, and the two clamp handles can rotate around the pin 306. The locking nut 302 is turned so that the locking nut 302 continues to move toward the inside of the conical cone 307. Since the slide bar 1 and the locking pin 301 cannot rotate relative to each other, the locking nut 302 can be directly turned. When the locking nut 302 moves to a suitable position, the locking nut 302 is in a locked state. At this time, the cantilever structure bends inwardly under the action of the tightening force of the locking nut 302, so that multiple cantilever structures clamp the slide bar 1 at the same time. At the same time, the locking protrusion 304 abuts against the outer side of the clamp handle, so that the two clamp handles are squeezed between the locking protrusion 304 and the annular boss 305, so that the two clamp handles no longer rotate; the cantilever structure corresponds to the four sides of the slide bar 1 one by one, and when the cantilever structure bends inwardly, it can firmly clamp the corresponding side.

[0045] Operation process: in the initial state, the locking nut 302 is in a loosened state, so that the two fixing clamps 2 can slide on the slide bar 1 with the locking pin 301, and at the same time, the fixing nut 205 is rotated to the end of the swing shaft 203, so that the two clamp handles of the fixing clamp 2 can be fully opened; the operator holds the hand grips 211 of the two fixing clamps 2 respectively, changes the relative positions of the two fixing clamps 2, and makes one of the clamps 207 enter the surgical incision, clamps one part of the broken femur, clamps the clamped broken part to a suitable position, and then holds the fixing clamp 2 with the other hand, and the freed hand twists the corresponding fixing nut 205, so that the distance between the two clamps 207 cannot be increased, thereby clamping the femur, and then tightens the fixing clamp 2 The locking device 3 is used to fix the fixing clamp 2 on the sliding bar 1 and the clamp handle cannot rotate, or another operator tightens the fixing nut 205 and the locking device 3; then the same method is used to clamp and fix another part of the broken femur with another fixing clamp 2, and the relative position between the fixing clamp 2 and the sliding bar 1 is fixed. At this time, the relative positions of the two fixing clamps 2 and the sliding bar 1 are fixed, and at the same time, the relative positions of the two fixing clamps 2 and the corresponding femurs are fixed and the femurs are located in a suitable position, and the relative positions of the femur and the sliding bar 1 are fixed, and then the next step of the operation can be carried out. When the operation is completed and the femur does not need to be clamped anymore, the fixing nut 205 is loosened, and then the locking nut 302 is loosened to remove the reduction fixture.

[0046] 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 invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A subtrochanteric fracture reduction and fixation device, characterized in that: The invention comprises a sliding rod with a polygonal cross section, on which a plurality of fixing clamps are distributed, the rotation center of the two clamp handles of the fixing clamp intersecting each other coincides with the center line of the sliding rod, the fixing clamp is slidably arranged on the sliding rod through a corresponding locking pin, and the fixing clamp uses the locking pin as a rotating pin, the sliding rod passes through a sliding hole matching the locking pin in the center of the locking pin, one end of the locking pin is an annular boss, and a conical cone at the other end is threadedly connected with a locking nut, the conical cone is divided into a plurality of cantilever structures in the circumferential direction, a locking protrusion is arranged on the locking nut toward one side of the fixing clamp, and when the locking nut is in a locked state, the cantilever structure bends inwardly under the action of the tightening force of the locking nut, so that Multiple cantilever structures clamp the sliding rod at the same time, and at the same time, the locking protrusion presses against the outer side surface of the fixed pliers handle, so that the two pliers handles are squeezed and fixed between the locking protrusion and the annular boss; each side of the sliding rod is an arc that protrudes outward and matches the sliding hole, and the groove between the edge of the sliding rod and the cantilever structure of the conical cone corresponds in position. When the locking nut is locked, the cantilever structure of the conical boss is squeezed and fixed on the corresponding surface of the sliding rod; the jaw width of the fixed pliers is greater than the width of the pliers handle, the inner walls of the two jaws match the outer contour of the clamped femur, and are distributed with anti-slip patterns extending in the width direction, and multiple serrations are arranged on the ends of the jaws in the width direction.

2. A subtrochanteric fracture reduction and fixation device according to claim 1, characterized in that: A swing shaft is arranged at a position near the locking pin on the gripping part of the fixed pliers, one end of the swing shaft is hinged on one of the pliers handles, the plane formed by the swinging of the swing shaft coincides with the plane formed by the swinging of the pliers handles, a fixing nut is threadedly connected on the swing shaft and passes through a long hole on the other pliers handle, and the fixing nut is located on the outer side of the pliers handle on the other side.

3. A subtrochanteric fracture reduction and fixation device according to claim 2, characterized in that: A spherical protrusion is arranged at the middle position of the fixing nut near the pliers handle, the threaded hole on the fixing nut passes through the spherical protrusion, and a rounded corner is arranged on the outer opening part of the long hole. When the fixing nut is pressed on the pliers handle, the spherical protrusion abuts against the rounded corner of the long hole.

4. The subtrochanteric fracture reduction and fixation device according to claim 1, characterized in that: The cross-section of the sliding rod is a square, and the four sides of the square bulge outward. The cross-sectional shape of the bulge is an arc, and the diameter of the circle in which the arc is located is larger than the diameter of the circumscribed circle of the square. Correspondingly, the inner cavity of the sliding hole matches the outer contour of the sliding rod, and four cantilever structures are evenly arranged on the conical truncated table, and the grooves between every two adjacent cantilever structures correspond one-to-one to the four edges on the sliding rod.

5. The subtrochanteric fracture reduction and fixation device according to claim 1, characterized in that: A locking handle is arranged at the outer end of the locking nut.

6. The subtrochanteric fracture reduction and fixation device according to claim 1, characterized in that: The two jaws of the fixed pliers are located on the same side of the center line of the angle between the two pliers handles, and the pliers handles between the jaws and the locking pins are bent toward the same side.

7. The subtrochanteric fracture reduction and fixation device according to claim 1, characterized in that: The distance between the jaws and the locking pin is smaller than the distance between the end of the hand grip on the other side of the pliers handle and the locking pin.

8. The subtrochanteric fracture reduction and fixation device according to claim 1, characterized in that: The width of the jaws is 3-4 cm.

9. The subtrochanteric fracture reduction and fixation device according to claim 1, characterized in that: The material of the jaws is elastic metal material.

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