Minimally invasive reduction device for femoral intertrochanteric fracture

Abstract

The utility model provides a minimally invasive reduction device for femoral intertrochanteric fracture. The minimally invasive reduction device comprises a fixed support, a movable support, a locking structure, a first adjusting assembly, a second adjusting assembly and a push claw. Wherein the fixed bracket is provided with an inner hook claw; the movable bracket is movably mounted on the fixed bracket; the locking structure is arranged between the fixed bracket and the movable bracket and is used for locking the movable bracket on the fixed bracket; the first adjusting assembly is arranged on the movable support. The second adjusting assembly is arranged on the first adjusting assembly; and the push claw is mounted on the second adjusting assembly, is opposite to the inner hook claw and is used for being matched with the inner hook claw to fix and align the fracture end. When the minimally invasive reduction device for the femoral intertrochanteric fracture is used, reduction and fixing operations can be completed through a small incision, continuous manual force application is not needed, the labor intensity is low, meanwhile, operation wounds and pain of a patient are reduced, and postoperative recovery of the patient is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical auxiliary instrument technical field, concretely relates to a device that can traction reduction of intertrochanteric fracture, especially to a kind of intertrochanteric fracture minimally invasive reduction device. BACKGROUND

[0002] Intertrochanteric fracture is a common fracture in the elderly, and its mortality rate is relatively high. The specific causes of intertrochanteric fracture include sudden twisting of the lower extremities, strong adduction or abduction when falling, direct impact of external force, etc. Intertrochanteric fracture is common in elderly patients, and the mortality rate is relatively high. The proportion of difficult reduction intertrochanteric fracture (especially A3 type fracture, which is often difficult to traction reduction) is relatively high, which leads to high surgical difficulty. Non-incision of fracture end and rapid closed reduction of fracture end in a short time can reduce bleeding volume, which is an effective method to reduce mortality and complications. There are two reduction methods for intertrochanteric fracture at present, one is to use conventional open surgery reduction, and the other is to use prying reduction (usually also referred to as percutaneous prying reduction).

[0003] Open surgery requires a large incision to expose the fracture end, which will cause a large surgical trauma. At the same time, the bleeding volume is also relatively large during the operation, which increases the risk of blood loss for patients. Such a large trauma and blood loss not only affects the postoperative recovery of patients, but also may increase the risk of complications. Since open surgery needs to cut the skin and tissues, the fracture site is connected with the outside world, so the risk of postoperative infection will increase. Once infection occurs, not only will it affect the healing of the fracture, but also may cause other serious complications, such as osteomyelitis, etc. In open surgery, in order to fully expose the fracture end, extensive stripping of the periosteum around the fracture is often needed; however, the periosteum is an important source of blood supply for the skeleton, and extensive periosteal stripping will damage the blood supply of the fracture end, which will affect the healing of the fracture. Due to the large trauma and slow recovery of open surgery, the rehabilitation time of patients will also be prolonged accordingly.

[0004] Prying reduction has its unique advantages over open surgical reduction, such as smaller surgical incision, lower risk of infection, protection of periosteum and soft tissue, and facilitation of fracture healing, but also has some defects. The current prying reduction operation mainly uses a combination of a vascular clamp and a periosteum stripper. First, a surgical incision is made at the front end of the femoral trochanter, and the periosteum stripper is inserted deep into the lateral side of the fracture end to pry the fracture end from the outside to the inside. If the reduction cannot be successfully achieved, a surgical incision is made on the inner side, and the vascular clamp is inserted from the incision to the posterior side of the proximal end of the femoral trochanter, and the proximal end of the femoral trochanter is prised outward, and the reduction of the fracture end is achieved by cooperation with the periosteum stripper. Then, after the reduction is completed, manual force needs to be continuously applied to maintain the reduction state, and any change in force may cause the reduction of the fracture end to move. The operation time of continuous force application is long, and the physical strength of the person is high. Since the working intensity of medical staff is large every day, it is very important to save physical strength.

[0005] Therefore, how to design a device for femoral intertrochanteric fracture reduction, which can enter the surrounding of femoral intertrochanteric through a smaller incision, reduce the femoral intertrochanteric fracture, and continuously fix the reduced fracture end to facilitate subsequent surgical fixation and suture, is a technical problem that has not been solved in the prior art. Practical new type content

[0006] Therefore, the technical problem to be solved by the present application is to overcome the technical defect that the existing bone fracture prying reduction generally uses a combination of a vascular clamp and a periosteum stripper, and long time is needed to maintain the reduction action after the reduction of the fracture end, resulting in large physical consumption. Therefore, a minimally invasive reduction device for femoral intertrochanteric fracture is provided, which can reduce the fracture end and continuously fix the reduced fracture end to facilitate subsequent surgical fixation and suture, thereby reducing physical consumption.

[0007] Therefore, the present application provides a device for minimally invasive reduction of femoral intertrochanteric fracture, comprising:

[0008] The fixing support has an inner hook claw;

[0009] The moving support is movably installed on the fixing support;

[0010] The locking structure is arranged between the fixing support and the moving support, and is used for locking the moving support on the fixing support;

[0011] The first adjusting assembly is arranged on the moving support and can be adjusted back and forth in the direction of approaching or moving away from the fixing support;

[0012] A second adjusting assembly is arranged on the first adjusting assembly, can move along with the first adjusting assembly, and can be adjusted to move towards the inner hook claw or away from the inner hook claw.

[0013] A pushing claw is arranged on the second adjusting assembly and opposite to the inner hook claw, and is used to cooperate with the inner hook claw to fix and align the fracture end.

[0014] As a preferred technical solution, the fixing support comprises a sliding rail, and the moving support is movably arranged on the sliding rail; and the arrangement direction of the inner hook claw on the fixing support is substantially perpendicular to the extension direction of the sliding rail.

[0015] As a preferred technical solution, the sliding rail is in a rectangular strip structure as a whole.

[0016] The locking structure comprises:

[0017] A plurality of locking blind holes are uniformly arranged on the lower end surface of the sliding rail.

[0018] A locking threaded through hole is arranged on the moving support.

[0019] A locking bolt is inserted into the locking blind hole through the locking threaded through hole, so as to lock the moving support on the sliding rail.

[0020] As a preferred technical solution, the moving support comprises:

[0021] The handle is in a rectangular structure as a whole, and a rectangular through hole is arranged inside the handle and used to cooperate with the sliding rail to slide.

[0022] An adjusting rod is fixedly arranged below the handle and used to arrange the first adjusting assembly and the second adjusting assembly.

[0023] As a preferred technical solution, a long through hole is arranged in the lower part of the adjusting rod, a sliding groove is arranged on the inner side wall of the long through hole, a second threaded hole is arranged on the adjusting rod opposite to the bottom of the sliding groove, and a limiting blind hole is arranged on the adjusting rod opposite to the top of the sliding groove.

[0024] The first adjusting assembly is arranged inside the sliding groove.

[0025] As a preferred technical solution, the first adjusting assembly comprises:

[0026] A sliding block is movably arranged in the sliding groove; a limiting boss opposite to the limiting blind hole is fixedly arranged on the top surface of the sliding block, a third threaded hole is arranged in the middle of the sliding block, and the two opening ends of the third threaded hole are opposite to the two opening ends of the long through hole, respectively.

[0027] The elastic member is arranged in the sliding groove, one end of which is installed in the limiting blind hole, and the other end of which is installed in the limiting boss;

[0028] The adjusting bolt is installed in the second threaded hole, and is used for pushing the sliding block to move up and down in the sliding groove.

[0029] As a preferred technical scheme, the second adjusting assembly comprises:

[0030] The transmission rod is threadedly connected with the third threaded hole;

[0031] The bearing is installed at one end of the transmission rod, and is rotatably connected with the pushing claw;

[0032] The operation through hole is arranged at the other end of the transmission rod;

[0033] The handle is installed in the operation through hole.

[0034] As a preferred technical scheme, the inner hook claw is in a C-shaped structure as a whole, the lower end of the inner hook claw is a sharp end with a small arc, and the arc gradually increases from the lower end to the upper end; a stress surface is arranged on the inner side of the inner hook claw, the stress surface is arranged towards the pushing claw, and the width of the stress surface gradually increases from the lower end to the upper end.

[0035] As a preferred technical scheme, the cross-sectional shape of the adjusting rod is trapezoidal, and the width of the adjusting rod gradually decreases along the direction away from the handle.

[0036] As a preferred technical scheme, the pushing claw is rotatably connected with the transmission rod through the bearing; the overall structure of the pushing claw is L-shaped, and two opposite semicircular bosses are arranged at the inner side of the two ends of the pushing claw, and are used for contacting the fracture between the femoral trochanter (for the purpose of stable support); an arc-shaped concave fitting surface is further arranged between the two semicircular bosses, and is used for fitting on the outer side of the femur.

[0037] The technical scheme provided by the utility model has the following advantages:

[0038] 1. The femoral intertrochanteric fracture minimally invasive reduction device of the utility model, including fixed support, mobile support, locking structure, first adjusting assembly, second adjusting assembly and push claw, wherein the fixed support has inner hook claw; the mobile support is movably installed on the fixed support; the locking structure is arranged between the fixed support and the mobile support, and is used for locking the mobile support on the fixed support; the first adjusting assembly is arranged on the mobile support and can be adjusted back and forth towards the direction of approaching or moving away from the fixed support; the second adjusting assembly is arranged on the first adjusting assembly, can move with the first adjusting assembly, and can be adjusted to move towards the direction of approaching or moving away from the inner hook claw; the push claw is installed on the second adjusting assembly and is opposite to the inner hook claw, and is used for fixing and aligning the fracture end in cooperation with the inner hook claw.

[0043] When the femoral intertrochanteric fracture minimally invasive reduction device of the utility model is used, first, surgical incisions are made on the inner side and the outer side of the femoral trochanter, the inner hook claw is inserted into the inner side or the rear side of the fracture end through the inner incision, the relative position of the mobile support on the fixed support is adjusted, the push claw is inserted into the outer side or the front side of the fracture end through the outer incision, then the mobile support and the fixed support are fixed through the locking structure, the first adjusting assembly is manually adjusted according to the direction of fracture displacement under the fluoroscopy of the C-arm X-ray machine, the push claw moves back and forth with the second adjusting assembly when the first adjusting assembly pushes the second adjusting assembly to move back and forth, and the push claw moves back and forth from the inner side or the rear side to adjust the pushing of the broken end of the femoral intertrochanteric fracture in the back and forth direction; the second adjusting assembly is manually adjusted, and the push claw also moves in the inner and outer directions under the independent pushing of the second adjusting assembly to adjust the pushing of the other broken end of the femoral intertrochanteric fracture in the inner and outer directions; after the fracture end is corrected and closed, the push claw can continuously abut against the broken part of the femur to realize the continuous fixing in two directions to facilitate the subsequent suture fixing. The femoral intertrochanteric fracture minimally invasive reduction device of the utility model can complete the reduction and fixing operation through a small incision, does not need artificial continuous force, has low labor intensity, reduces surgical trauma and patient pain, and is beneficial to the postoperative recovery of the patient.

[0044] 2. The femoral intertrochanteric fracture minimally invasive reduction device of the utility model, the fixed support includes a slide rail, and the mobile support is movably installed on the slide rail. The design of the slide rail allows the mobile support to freely slide thereon, the position of the push claw can be flexibly adjusted through the accurate guidance of the slide rail, the adjustment process becomes simple and fast, the operation time is saved, and the operation efficiency is improved.

[0045] 3. The femoral intertrochanteric fracture minimally invasive reduction device of the utility model, the locking structure includes a locking blind hole, a locking threaded through hole and a locking bolt; the doctor can more quickly complete the adjustment and fixing of the fracture reduction device by adjusting the locking bolt to lock the mobile support at the required position. 4. The femoral intertrochanteric fracture minimally invasive reduction device of the utility model, the adjusting rod is fixedly arranged below the handle, and is used for mounting the first adjusting assembly and the second adjusting assembly. The existence of the adjusting rod provides a stable mounting platform for the first adjusting assembly and the second adjusting assembly, so that these assemblies can be firmly fixed on the moving support.

[0043] 5. The femoral intertrochanteric fracture minimally invasive reduction device of the utility model, the first adjusting assembly comprises a sliding block, an elastic member and an adjusting bolt; the sliding block is movably mounted in the sliding groove, can be conveniently pushed up and down by the adjusting bolt and the elastic member, so as to realize accurate adjustment of the height; and the existence of the elastic member can also absorb vibration and shaking in the operation process to a certain extent, thereby improving the accuracy and safety of the operation.

[0044] 6. The femoral intertrochanteric fracture minimally invasive reduction device of the utility model, the second adjusting assembly comprises a transmission rod, a bearing, an operation through hole and a handle; the transmission rod is in threaded connection with the third threaded hole, can realize fine adjustment, and can accurately control the position or extrusion degree of the pushing claw by rotating the transmission rod, so as to realize fine adjustment operation of femoral reduction; the installation of the bearing enables the pushing claw to independently rotate relative to the transmission rod without rotating with the transmission rod, thereby facilitating accurate reduction of the fracture end; the handle is installed in the operation through hole, thereby further enhancing the convenience and comfort of operation; and the doctor can drive the transmission rod by rotating the handle, thereby realizing rapid and efficient adjustment.

[0045] 7. The femoral intertrochanteric fracture minimally invasive reduction device of the utility model, comprising an inner hook claw, the inner hook claw is in a C-shaped structure as a whole, the lower end of the inner hook claw has a small arc, and the arc gradually increases from the lower end to the upper end; an inner side of the inner hook claw is provided with a stress surface, the stress surface is arranged towards the pushing claw and gradually widens from the lower end to the upper end. The inner hook claw is in a C-shaped structure as a whole, this design can better fit the natural form of the femoral intertrochanteric fracture, reduces damage to the surrounding tissues, the C-shaped inner hook claw can be more easily inserted into the fracture site during the operation process, accurate reduction operation is realized, and damage to the surrounding soft tissues and muscles is minimized, thereby meeting the principle of minimally invasive surgery; the lower end of the inner hook claw has a small arc, and the arc gradually increases from the lower end to the upper end, this design enables the inner hook claw to more accurately hook the fracture fragments or displaced parts, thereby realizing accurate reduction; and the stress surface arranged on the inner side of the inner hook claw is arranged towards the pushing claw and gradually widens from the lower end to the upper end, so that the stress surface can more evenly distribute the force exerted by the pushing claw during the reduction process, thereby avoiding tissue damage caused by excessive force on a single point, and the gradually widening stress surface can also provide better stability and support, thereby ensuring that the fracture site after reduction can remain stable. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to make the technical scheme in the prior art or the specific embodiment of the utility model clearer, the drawings used in the description of the prior art or the specific embodiment will be briefly introduced as follows.

[0047] Figure 1 It is the whole structure schematic diagram of the femoral intertrochanteric fracture minimally invasive reduction device.

[0048] Figure 2 It is another perspective view of Figure 1 .

[0049] Figure 3 It is the perspective view after the moving support in Figure 1 is taken off.

[0050] Figure 4 It is the sectional view of the moving support in Figure 1 .

[0051] Figure 5 It is the full sectional view of Figure 1 .

[0052] Figure 6 It is the structure enlarged schematic view of A part in Figure 5 .

[0053] Reference signs: 1, fixed support; 2, moving support; 3, locking bolt; 4, push claw; 5, slide rail; 6, inner hook claw; 7, locking hole; 8, stress surface; 9, handle; 10, adjusting rod; 11, rectangular through hole; 12, prismatic anti-skid structure; 13, locking threaded through hole; 14, long through hole; 15, sliding groove; 16, second threaded hole; 17, limiting blind hole; 18, sliding block; 19, limiting boss; 20, third threaded hole; 21, elastic piece; 22, adjusting bolt; 23, transmission rod; 24, through hole; 25, bearing; 26, handle; 27, operation through hole; 28, fitting surface. Specific embodiment

[0054] In order to make the technical scheme in the prior art or the specific embodiment of the utility model clearer, the drawings used in the description of the prior art or the specific embodiment will be briefly introduced as follows.

[0055] It should be noted that the terms "first," "second," and the like in the claims and description of this application are used to distinguish similar objects, and are not used to describe a particular order or precedence. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0056] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to having a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain cases. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other unless there is a conflict.

[0057] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0058] This embodiment provides a minimally invasive reduction device for intertrochanteric fractures of the femur. Figures 1-3 As shown, it includes: a fixed bracket 1, a movable bracket 2, a locking structure, a first adjustment component, a second adjustment component and a push claw 4; wherein, the fixed bracket 1 has an inner hook claw 6; the movable bracket 2 is movably mounted on the fixed bracket 1; the locking structure is arranged between the fixed bracket 1 and the movable bracket 2, and is used to lock the movable bracket 2 on the fixed bracket 1; the first adjustment component is arranged on the movable bracket 2, and can be adjusted back and forth in the direction of approaching or moving away from the fixed bracket 1; the second adjustment component is arranged on the first adjustment component, can follow the movement of the first adjustment component, and can be adjusted in the direction of approaching or moving away from the inner hook claw 6; the push claw 4, which is installed on the second adjustment component, is opposite to the inner hook claw 6, and is used to cooperate with the inner hook claw 6 to fix and align the fracture ends.

[0059] When the femoral intertrochanteric fracture minimally invasive reduction device is used, firstly, surgical incisions are made on the medial and lateral sides of the femoral trochanter, the inner hook claw 6 is extended to the medial or posterior side of the fracture end through the medial incision, the relative position of the moving support 2 on the fixed support 1 is adjusted, the push claw 6 is extended to the lateral or anterior side of the fracture end through the lateral incision, then the moving support 2 is fixed with the fixed support 1 through the locking structure, the first adjusting assembly is manually adjusted according to the direction of the fracture displacement under the C-arm X-ray machine perspective, the push claw 4 moves forward and backward along with the second adjusting assembly when the first adjusting assembly pushes the second adjusting assembly, the push claw 4 moves in the medial-lateral direction under the independent pushing of the second adjusting assembly, the push claw 4 moves in the medial-lateral direction to adjust the push of the other end of the femoral intertrochanteric fracture, after the fracture end is corrected and closed, the push claw 4 can continuously abut against the fracture end of the femur to realize the continuous fixation in two directions so as to facilitate the subsequent suture fixation.

[0060] As shown in Figure 1 and Figure 2 , the fixed support 1 comprises a slide rail 5, the moving support 2 is movably installed on the slide rail 5, and the setting direction of the inner hook claw 6 on the fixed support 1 is substantially perpendicular to the extension direction of the slide rail 5. The design of the slide rail 5 allows the moving support 2 to freely slide thereon, the position of the push claw 4 can be flexibly adjusted through the accurate guidance of the slide rail 5, the adjustment process becomes simple and fast, the operation time is saved, and the operation efficiency is improved.

[0061] As shown in Figures 3-5 , the slide rail 5 is in the overall rectangular strip structure, the locking structure comprises a locking blind hole 7, a locking threaded hole 13 and a locking bolt 3, the locking blind hole 7 has a plurality of locking blind holes 7 which are uniformly arranged on the lower end face of the slide rail 5, the locking threaded hole 13 is arranged on the moving support 2, and the locking bolt 3 is inserted into the locking blind hole 7 after passing through the locking threaded hole 13, so that the moving support 2 is locked on the slide rail 5. The doctor can more quickly complete the adjustment and fixation of the fracture reduction device by adjusting the locking bolt 3 to lock the moving support 2 at the required position.

[0062] As shown in Figure 1 and Figure 2As shown, the mobile support 2 comprises a handle 9 and an adjusting rod 10; wherein the handle 9 is in the overall rectangular structure, and a rectangular through hole 11 is formed in the interior for cooperating with the slide rail 5 to slide; the adjusting rod 10 is fixedly arranged below the handle 9, and is used for mounting the first adjusting assembly and the second adjusting assembly. The existence of the adjusting rod 10 provides a stable mounting platform for the first adjusting assembly and the second adjusting assembly, so that these assemblies can be firmly fixed on the mobile support.

[0063] As preferred, a prismatic anti-skid structure 12 is arranged at the positions on both sides of the rear end of the handle 9.

[0064] As shown in the figure, Figure 4 As shown, a long through hole 14 is formed in the lower part of the adjusting rod 10, a sliding groove 15 is formed in the inner side wall of the long through hole 14, a second threaded hole 16 is formed in the adjusting rod 10 opposite to the bottom of the sliding groove 15, and a limiting blind hole 17 is formed in the adjusting rod 10 opposite to the top of the sliding groove 15; the first adjusting assembly is mounted in the sliding groove 15.

[0065] As shown in the figure, Figure 3 As shown, the first adjusting assembly comprises a sliding block 18, an elastic member 21 and an adjusting bolt 22; wherein the sliding block 18 is movably mounted in the sliding groove 15; a limiting boss 19 opposite to the limiting blind hole 17 is fixedly arranged on the top surface of the sliding block 18, a third threaded hole 20 is formed in the middle part, and the two opening ends of the third threaded hole 20 are respectively opposite to the two opening ends of the long through hole 14; the elastic member 21 is arranged in the sliding groove 15, one end of which is mounted in the limiting blind hole 17, and the other end is mounted in the limiting boss 19; the adjusting bolt 22 is mounted in the second threaded hole 16, and is used for pushing the sliding block 18 to move up and down in the sliding groove 15. The sliding block 18 is movably mounted in the sliding groove 15, and can be conveniently pushed up and down by the adjusting bolt 22 and the elastic member 21, so as to realize the accurate adjustment of the height; the existence of the elastic member 21 can also absorb the vibration and shaking in the operation process to a certain extent, and improve the accuracy and safety of the operation.

[0066] As shown in the figure, Figure 5As shown, the second adjusting assembly comprises a transmission rod 23, a bearing 25, an operation through hole 27 and a handle 26; wherein, the transmission rod 23 is threadedly connected with the third threaded hole 20; the bearing 25 is installed at one end of the transmission rod 23 and rotatably connected with the push claw 4; the operation through hole 27 is arranged at the other end of the transmission rod 23; and the handle 26 is installed in the operation through hole 27. The transmission rod 23 is threadedly connected with the third threaded hole 20, so that the fine adjustment function can be realized, the position or extrusion degree of the push claw 4 can be accurately controlled by rotating the transmission rod 23, and the fine adjustment operation of the femur reduction can be realized; the installation of the bearing 25 enables the push claw 4 to rotate independently relative to the transmission rod 23 without rotating with the transmission rod 23, so that the accurate reduction of the fracture end is facilitated; the handle 26 is installed in the operation through hole 27, so that the convenience and comfort of the operation are further enhanced; and the doctor can drive the transmission rod 23 by rotating the handle 26, so that the rapid and efficient adjustment is realized.

[0067] As shown in Figure 2 and Figure 3 As shown, the inner hook claw 6 is in a C-shaped structure as a whole, the lower end of the inner hook claw 6 is a sharp end with a small arc, and the arc gradually increases from the lower end to the upper end; a stress surface 8 is arranged on the inner side of the inner hook claw 6, the stress surface 8 is arranged towards the push claw 4, and the width gradually increases from the lower end to the upper end.

[0068] As shown in Figure 5 and Figure 6 As shown, the push claw 4 is rotatably connected with the transmission rod 23 through the bearing 25; the overall structure of the push claw 4 is in an L shape, two opposite semicircular bosses are arranged at the inner side of the two end portions, and are used to contact the fracture between the trochanter of the femur (to play a role of stable support); an arc-shaped concave fitting surface 28 is further arranged between the two semicircular bosses, and is used to fit on the outer side of the femur.

[0069] The use method of the femoral intertrochanteric fracture minimally invasive reduction device in the embodiment is as follows:

[0070] Firstly, surgical incisions are made on the inner side and the outer side of the femoral trochanter, the inner hook claw 6 is inserted into the inner side or the rear side of the fracture end through the inner incision, the relative position of the moving bracket 2 on the fixed bracket 1 is adjusted, the push claw 6 is inserted into the outer side or the front side of the fracture end through the outer incision, and then the locking bolt 3 is manually screwed, so that the top end of the locking bolt 3 is inserted into the locking blind hole 7 after passing through the locking threaded through hole 13, thereby locking the moving bracket 2 on the sliding rail 5.

[0071] According to the direction of the fracture displacement under the fluoroscopy of the intraoperative C-arm X-ray machine, the adjusting bolt 22 is manually rotated, the adjusting bolt 22 will drive the sliding block 18 to move along the sliding groove 15 under the threaded transmission of the second threaded hole 16, and will drive the second adjusting assembly installed on the sliding block 18 to move, to drive the push pawl to move forward and backward, to adjust the forward and backward pushing of the fractured end of the intertrochanteric fracture of the femur from the inside or the rear side.

[0072] The handle 26 is manually rotated, the handle 26 drives the transmission rod 23 to rotate, the transmission rod 23 will rotate and move along the third threaded hole under the threaded transmission of the third threaded hole 20; after the rotation is offset by the bearing 25, the push pawl 4 will be pushed to move in the medial-lateral direction, to adjust the medial-lateral pushing of the other end of the intertrochanteric fracture of the femur; after the fracture end is corrected and closed, it can also continuously abut against the fractured part of the femur, to realize the continuous fixation in two directions to facilitate the subsequent suture fixation.

[0073] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. Other different forms of changes or variations can be made on the basis of the above description for those of ordinary skill in the art. All the embodiments do not need to be exhausted here, and the obvious changes or variations derived therefrom are still within the protection scope of the technical scheme.

Claims

1. A minimally invasive reduction device for intertrochanteric fracture, characterized in that: The utility model relates to a kind of bone fracture fixation device, including: Fixed support (1) with inner hook claw (6); Mobile support (2) is movably installed on the fixed support (1); Locking structure is arranged between the fixed support (1) and the mobile support (2), for locking the mobile support (2) on the fixed support (1); First adjusting assembly is arranged on the mobile support (2), and can be adjusted to move back and forth towards the direction close to or away from the fixed support (1); Second adjusting assembly is arranged on the first adjusting assembly, can move with the first adjusting assembly, and can be adjusted to move towards the direction close to or away from the inner hook claw (6); Push claw (4) is installed on the second adjusting assembly, opposite the inner hook claw (6), for cooperating with the inner hook claw (6) and fixing the fracture end alignment.

2. The minimally invasive reduction device for intertrochanteric fractures of the femur according to claim 1, characterized in that: The fixed support (1) includes slide rail (5), and the mobile support (2) is movably installed on the slide rail (5);The setting direction of the inner hook claw (6) on the fixed support (1) is substantially perpendicular to the extension direction of the slide rail (5).

3. The minimally invasive reduction device for intertrochanteric fractures of the femur of claim 2, wherein: The slide rail (5) is overall rectangular long strip structure; The locking structure includes: Locking blind hole (7) has several, is evenly arranged on the lower end surface of the slide rail (5); Locking threaded through hole (13) is arranged on the mobile support (2); Locking bolt (3) is inserted into the locking blind hole (7) after passing through the locking threaded through hole (13), so as to lock the mobile support (2) on the slide rail (5).

4. The femoral intertrochanteric fracture minimally invasive reduction device according to claim 2, characterized in that: The mobile support (2) includes: Grip (9) is overall rectangular structure, and rectangular through hole (11) is arranged in the inside for cooperating with the slide rail (5) and sliding; Adjusting rod (10) is fixedly arranged below the grip (9), for installing the first adjusting assembly and the second adjusting assembly.

5. The minimally invasive reduction device for intertrochanteric fractures of the femur of claim 4, wherein: The lower part of the adjusting rod (10) is provided with long through hole (14), and the inner side wall of the long through hole (14) is provided with sliding groove (15), and the second threaded hole (16) is arranged on the adjusting rod (10) opposite the bottom of the sliding groove (15), and the limiting blind hole (17) is arranged on the adjusting rod (10) opposite the top of the sliding groove (15); The first adjusting assembly is installed in the sliding groove (15).

6. The minimally invasive reduction device for intertrochanteric fractures of the femur according to claim 5, wherein, The first adjusting assembly includes: Sliding block (18) is movably installed in the sliding groove (15);The top surface of the sliding block (18) is fixedly provided with limiting boss (19) opposite the limiting blind hole (17), and the middle part is provided with third threaded hole (20), and the two opening ends of the third threaded hole (20) are opposite the two opening ends of the long through hole (14) respectively; Elastic member (21) is arranged in the sliding groove (15), one end is installed in the limiting blind hole (17), the other end is installed in the limiting boss (19); Adjusting bolt (22) is installed in the second threaded hole (16), for pushing the sliding block (18) and moving up and down in the sliding groove (15).

7. The minimally invasive reduction device for intertrochanteric fractures of the femur according to claim 6, wherein, The second adjusting assembly includes: A transmission rod (23) is threadedly connected with the third threaded hole (20); A bearing (25) is installed at one end of the transmission rod (23) and rotatably connected with the push claw (4); An operation through hole (27) is arranged at the other end of the transmission rod (23); A handle (26) is installed in the operation through hole (27).

8. The femoral intertrochanteric fracture minimally invasive reduction device according to claim 2, characterized in that: The inner hook claw (6) is in a C-shaped structure as a whole, the lower end of the inner hook claw (6) is a sharp end with a small arc, and the arc gradually increases from the lower end to the upper end; a stress surface (8) is arranged on the inner side of the inner hook claw (6), the stress surface (8) is arranged towards the push claw (4), and the width gradually increases from the lower end to the upper end.

9. The femoral intertrochanteric fracture minimally invasive reduction device according to claim 4, characterized in that: The cross-sectional shape of the adjusting rod (10) is trapezoidal, and the width of the adjusting rod (10) gradually decreases in the direction away from the grip (9).

10. The femoral intertrochanteric fracture minimally invasive reduction device according to claim 7, wherein: The push claw (4) is rotatably connected with the transmission rod (23) through the bearing (25); the overall structure of the push claw (4) is L-shaped, two end portions on the inner side are provided, two opposite semicircular bosses are arranged, contact the fracture between the femoral trochanter, and play a role in stable support; an arc-shaped concave fitting surface (28) is further arranged between the two semicircular bosses, and is used for fitting on the outer side of the femur.

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