Femoral trochanteric extramedullary positioning V-shaped osteotomy device

Abstract

The utility model belongs to the technical field of orthopedic medical instruments, and provides a thighbone trochanter extramedullary positioning V-shaped osteotomy device, which comprises two groups of V-shaped osteotomy modules, the two V-shaped osteotomy modules are arranged in the same direction, position fixing hole pieces are arranged on the two V-shaped osteotomy modules, the position fixing hole pieces are matched with kirschner wires, and the kirschner wires are matched with the position fixing hole pieces. A V-shaped osteotomy groove is formed between the top and the bottom of the V-shaped osteotomy module in a penetrating manner; the positioning assembly comprises a sliding rail, an anti-skid piece is arranged at the bottom end of the sliding rail, a sliding groove is formed in the top of the sliding rail, two sets of connecting rods are connected into the sliding groove in a sliding mode, the two connecting rods are vertically arranged, position measuring pieces are arranged between the connecting rods and the sliding rail, and the two V-shaped osteotomy modules are detachably connected to the two connecting rods. According to the utility model, the osteotomy length can be adjusted according to the condition of a patient, the anti-rotation capability of an osteotomy part is improved, and the surgical operation accuracy and simplicity are improved.

Description

Technical Field

[0001] This utility model belongs to the field of orthopedic medical device technology, and in particular relates to a V-shaped osteotomy device for subtrochanteric extramedullary positioning of the femur. Background Technology

[0002] Developmental dysplasia of the hip (DDH), formerly known as congenital hip dislocation, refers to abnormalities in the morphology and relative position of the proximal femur and acetabulum caused by various factors during development. The overall incidence of DDH in China is approximately 1.52%, with about 0.75% in males and 2.07% in females. DDH can be classified according to severity as acetabular dysplasia, low dislocation, and high dislocation. For DDH patients with severe pain in the affected limb, limited function, severe hip dislocation, significant femoral head deformity, joint space narrowing, and severe hip osteoarthritis, total hip arthroplasty (THA) is the ideal treatment.

[0003] High dislocation of the femoral head (DDH) (such as shortening >4cm) is often accompanied by soft tissue contracture, making femoral reduction after true acetabular reconstruction during THA extremely difficult. To achieve good reduction of the femoral head while avoiding nerve traction injury, femoral shortening osteotomy is often necessary. Femoral shortening osteotomy can be divided into subtrochanteric osteotomy, greater trochanteric osteotomy, and lesser trochanteric osteotomy. Subtrochanteric shortening osteotomy has advantages such as rapid healing of the osteotomy site, convenient adjustment of the osteotomy length, adaptation of proximal coated prostheses and bone ingrowth, protection of the integrity of the abductor muscles, and restoration of tension. It is currently the most commonly used method, such as subtrochanteric transverse osteotomy, oblique osteotomy, V-shaped osteotomy, Z-shaped osteotomy, and S-shaped osteotomy. Transverse osteotomy is widely used due to its ease of operation, but its biggest drawback is the lack of anti-rotation ability at the osteotomy site, which can lead to some complications. V-shaped osteotomy can provide sufficient anti-rotation ability, but it is quite difficult to control the osteotomy length and two matching V-shaped osteotomy surfaces during the operation using only traditional tools and manual manipulation. Current traditional osteotomy tools cannot meet clinical needs, and some intramedullary positioning V-shaped osteotomy guide tools have drawbacks such as being cumbersome and complex to operate and causing significant trauma. Utility Model Content

[0004] The purpose of this invention is to provide a V-shaped osteotomy device for extramedullary positioning of the femoral trochanter to solve the above problems, thereby achieving the goal of adjusting the osteotomy length according to the patient's condition, improving the anti-rotation ability of the osteotomy site, and improving the accuracy and ease of surgical operation.

[0005] To achieve the above objectives, this utility model provides the following solution: a V-shaped osteotomy device for subtrochanteric extramedullary positioning of the femur, comprising:

[0006] Two sets of V-shaped osteotomy modules are arranged in the same direction. Each V-shaped osteotomy module is provided with a position fixing hole, which is adapted to Kirschner wire. A V-shaped osteotomy groove is formed between the top and bottom of the V-shaped osteotomy module.

[0007] The positioning component includes a slide rail, with an anti-slip element at the bottom and a groove at the top. Two sets of connecting rods are slidably connected within the groove. The two connecting rods are vertically arranged, and a position measuring element is provided between the connecting rods and the slide rail. The two V-shaped osteotomy modules are detachably connected to the two connecting rods.

[0008] Preferably, the fixing hole includes a first central positioning hole and a second central positioning hole that pass through the top and bottom of the V-shaped osteotomy module. The first central positioning hole and the second central positioning hole are located in the middle of the V-shaped osteotomy module, and the first central positioning hole and the second central positioning hole are respectively located on both sides of the V-shaped osteotomy groove.

[0009] Preferably, the bottom of the slide groove has a slot along the length of the slide groove, and the slot is disposed between the bottom of the slide groove and the bottom of the slide rail, and the slot is located below the first central positioning hole and the second central positioning hole.

[0010] Preferably, the fixing hole further includes two sets of side edge positioning holes respectively disposed on both sides of the V-shaped osteotomy module. The side edge positioning holes include a plurality of first side edge positioning holes and a plurality of second side edge positioning holes, and the plurality of first side edge positioning holes and the plurality of second side edge positioning holes are respectively located on both sides of the V-shaped osteotomy groove.

[0011] Preferably, a square hole is provided between the top and bottom of the V-shaped osteotomy module, and the square hole is adapted to the connecting rod.

[0012] Preferably, the position measuring element includes a side scale on the side wall of the connecting rod and a top scale on the top of the connecting rod. The top of the slide rail is provided with a length line, which is parallel to the slide groove. The side scale and the top scale are corresponding to the length line.

[0013] Preferably, the anti-slip component includes a plurality of anti-slip studs, which are fixedly connected to the bottom of the slide rail.

[0014] Compared with the prior art, the present invention has the following advantages and technical effects: Overall, the present invention adjusts the distance between the two V-shaped osteotomy modules by moving along the same provided slide groove, and quickly determines the interval between the two V-shaped osteotomy modules by using a position measuring device, and determines the position of the V-shaped osteotomy modules by using a position fixing hole device, so as to quickly obtain the target osteotomy length and two matching, parallel V-shaped osteotomy surfaces, thereby reducing the difficulty of V-shaped osteotomy surgery for high dislocation DDH, making osteotomy more precise, and facilitating the smooth progress of the surgery and the patient's postoperative recovery. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the osteotomy device of this utility model;

[0017] Figure 2 This is a schematic diagram of the slide rail of this utility model;

[0018] Figure 3 This is a schematic diagram of the connecting rod of this utility model;

[0019] Figure 4 This is a schematic diagram of the V-shaped osteotomy module of this utility model;

[0020] Among them, 1. slide rail; 11. slide groove; 12. groove opening; 13. anti-slip nail; 2. connecting rod; 21. top scale; 22. side scale; 3. V-shaped osteotomy module; 31. square hole; 32. first central positioning hole; 33. second central positioning hole; 34. first side edge positioning hole; 35. second side edge positioning hole; 36. V-shaped osteotomy groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figures 1-4 This utility model provides a V-shaped osteotomy device for subtrochanteric extramedullary positioning of the femur, comprising:

[0024] Two sets of V-shaped osteotomy modules 3 are arranged in the same direction. Each V-shaped osteotomy module 3 is provided with a position fixing hole, which is adapted to Kirschner wire. A V-shaped osteotomy groove 36 is provided between the top and bottom of the V-shaped osteotomy module 3.

[0025] The positioning component includes a slide rail 1, with an anti-slip component at the bottom and a groove 11 at the top. Two sets of connecting rods 2 are slidably connected in the groove 11. The two connecting rods 2 are vertically arranged, and a position measuring component is provided between the connecting rods 2 and the slide rail 1. Two V-shaped osteotomy modules 3 are detachably connected to the two connecting rods 2.

[0026] The main function of the positioning fixing hole is to allow the Kirschner wire to pass through and to fix the position of the V-shaped osteotomy module 3 after the Kirschner wire has determined its position. The main function of the V-shaped osteotomy groove 36 is to limit the movement path of the small oscillating saw and make the osteotomy section have a consistent V-shaped section. The main function of the anti-slip component is to prevent the slide rail 1 from moving accidentally during the positioning of the V-shaped osteotomy module 3. The main function of the connecting rod 2 is to drive the V-shaped osteotomy module 3 to slide along the slide groove 11 to the appropriate position. The main function of the position measuring component is to measure the distance between the two connecting rods 2 to make the two V-shaped osteotomy modules 3 have an appropriate spacing, thereby removing a bone segment of appropriate length. Overall, this invention adjusts the distance between two V-shaped osteotomy modules by moving them along the same provided groove, quickly determines the interval between the two V-shaped osteotomy modules by a position measuring device, and determines the position of the V-shaped osteotomy modules by a position fixing hole device, so as to quickly obtain the target osteotomy length and two matching, parallel V-shaped osteotomy surfaces. This reduces the difficulty of V-shaped osteotomy surgery for high dislocation DDH, makes osteotomy more precise, and facilitates the smooth progress of the surgery and the patient's postoperative recovery.

[0027] The design is further optimized so that the fixing hole includes a first central positioning hole 32 and a second central positioning hole 33 that are opened between the top and bottom of the V-shaped osteotomy module 3. The first central positioning hole 32 and the second central positioning hole 33 are located in the middle of the V-shaped osteotomy module 3, and the first central positioning hole 32 and the second central positioning hole 33 are located on both sides of the V-shaped osteotomy groove 36, respectively.

[0028] Further optimize the plan, such as Figure 4 As shown, the dimensions of the first central positioning hole 32 and the second central positioning hole 33 are designed to match 2mm Kirschner wires.

[0029] In a further optimized design, a slot 12 is provided at the bottom of the slide 11 along the length of the slide 11, and the slot 12 is provided through the bottom of the slide 11 and the bottom of the slide rail 1. The slot 12 is located below the first central positioning hole 32 and the second central positioning hole 33.

[0030] like Figure 1 and Figure 2 As shown, the two ends of the groove 12 are close to the two ends of the slide groove 11 respectively. During the positioning process, the Kirschner wire passes through the first central positioning hole 32 or the second central positioning hole 33 and the groove 12 and is fixed to the bone surface.

[0031] like Figure 1 and Figure 3 As shown, the slide groove 11 has a T-shaped structure, and the bottom of the connecting rod 2 is fitted with a locking block to form a T-shaped structure that matches the slide groove 11.

[0032] Further optimization of the design includes two sets of side-edge positioning holes respectively set on both sides of the V-shaped osteotomy module 3. The side-edge positioning holes include a number of first side-edge positioning holes 34 and a number of second side-edge positioning holes 35, which are located on both sides of the V-shaped osteotomy groove 36.

[0033] like Figure 1 and Figure 4 As shown, three sets of first side edge positioning holes 34 and two sets of second side edge positioning holes 35 are provided. During the positioning stage of the V-shaped osteotomy module 3, Kirschner wires can be used to pass through the first side edge positioning holes 34 and the second side edge positioning holes 35 at appropriate positions on the left and right sides of the V-shaped osteotomy module 3 and fix them to the bone surface to achieve the positioning operation.

[0034] The design was further optimized so that the dimensions of the first side edge positioning hole 34 and the second side edge positioning hole 35 were designed to match 1.5mm Kirschner wires.

[0035] To further optimize the design, a square hole 31 is provided between the top and bottom of the V-shaped osteotomy module 3, and the square hole 31 is adapted to the connecting rod 2.

[0036] like Figure 1 As shown, the connecting rod 2 has a cuboid structure, which allows the V-shaped osteotomy module 3 to be fitted onto the connecting rod 2 through the square hole 31, and ensures that the V-shaped osteotomy module 3 will not deflect relative to the slide rail 1, thus ensuring that the two bone surfaces cut by the two V-shaped osteotomy modules 3 match.

[0037] The scheme is further optimized. The position measuring component includes a side scale 22 set on the side wall of the connecting rod 2 and a top scale 21 set on the top of the connecting rod 2. The top of the slide rail 1 is provided with a length scale line, and the length scale line is set parallel to the slide groove 11. The side scale 22, the top scale 21 and the length scale line are set correspondingly.

[0038] like Figure 1 and Figure 3 As shown, during use, the distance between the two connecting rods 2 can be determined by pointing to the length markings on the side scale 22 and the top scale 21.

[0039] The design is further optimized so that the anti-slip component includes several anti-slip nails 13, which are fixedly connected to the bottom of the slide rail 1.

[0040] The working process of this embodiment is as follows:

[0041] First, place the slide rail 1 in the appropriate position and gently tap the four anti-slip pins 13 at the bottom of the slide rail 1 to secure it properly;

[0042] Furthermore, the bottom ends of the two connecting rods 2 are respectively inserted into the slide grooves 11 of the slide rail 1;

[0043] Furthermore, the two V-shaped osteotomy modules 3 are aligned in the same direction and inserted from the top of the connecting rod 2 through the square hole 31;

[0044] Furthermore, sliding the first connecting rod 2 moves the V-shaped osteotomy groove 36 of the first V-shaped osteotomy module 3 to the desired position of the distal osteotomy surface;

[0045] Furthermore, based on the actual position, two 1.5mm Kirschner wires are drilled into a first side edge positioning hole 34 on both sides of the first V-shaped osteotomy module 3 to fix the first V-shaped osteotomy module 3 to the bone surface.

[0046] Furthermore, by sliding the second connecting rod 2, the osteotomy length and the proximal osteotomy position of the V-shaped osteotomy groove 36 of the second V-shaped osteotomy module 3 are determined by observing the length markings, side markings 22, and top markings 21.

[0047] Furthermore, based on the actual position, two 1.5mm Kirschner wires are drilled into a second side edge positioning hole 35 on both sides of the second V-shaped osteotomy module 3 to fix the second V-shaped osteotomy module 3 to the bone surface.

[0048] Further, remove the V-shaped osteotomy module 3, slide rail 1 and connecting rod 2 one after another, and then reposition the V-shaped osteotomy module 3 on the bone surface according to the position of the Kirschner wire;

[0049] Furthermore, a 2.0mm Kirschner wire is drilled into the first central positioning hole 32 of the first V-shaped osteotomy module 3;

[0050] Furthermore, a 2.0mm Kirschner wire is drilled into the second central positioning hole 33 of the second V-shaped osteotomy module 3;

[0051] Furthermore, distal and proximal osteotomies are performed respectively using a small oscillating saw according to the V-shaped osteotomy grooves 36 on the first V-shaped osteotomy module 3 and the second V-shaped osteotomy module 3.

[0052] Furthermore, remove all tool components;

[0053] Furthermore, the bone segment between the proximal and distal osteotomy surfaces is removed;

[0054] Further, the distal and proximal ends of the femur are reduced;

[0055] Next, a femoral model is placed in the femoral osteotomy, the hip joint is reduced, and the stability, range of motion, and tension of the soft tissues around the hip joint are checked. Attention is paid to the alignment of the V-shaped osteotomy surface under the trochanter. Once all is satisfactory, the femoral stem prosthesis can be placed. The remaining procedures are the same as those for routine hip replacement surgery.

[0056] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0057] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A V-shaped osteotomy device for subtrochanteric extramedullary positioning of the femur, characterized in that... ,include: Two sets of V-shaped osteotomy modules (3) are arranged in the same direction. Each of the two V-shaped osteotomy modules (3) is provided with a position fixing hole. The position fixing hole is adapted to Kirschner wire. A V-shaped osteotomy groove (36) is provided between the top and bottom of the V-shaped osteotomy module (3). The positioning component includes a slide rail (1), with an anti-slip component at the bottom of the slide rail (1) and a groove (11) at the top of the slide rail (1). Two sets of connecting rods (2) are slidably connected in the groove (11). The two connecting rods (2) are vertically arranged. A position measuring component is provided between the connecting rod (2) and the slide rail (1). The two V-shaped osteotomy modules (3) are detachably connected to the two connecting rods (2).

2. The femoral subtrochanteric extramedullary positioning V-shaped osteotomy device according to claim 1, characterized in that: The fixing hole includes a first central positioning hole (32) and a second central positioning hole (33) that pass through the top and bottom of the V-shaped osteotomy module (3). The first central positioning hole (32) and the second central positioning hole (33) are located in the middle of the V-shaped osteotomy module (3), and the first central positioning hole (32) and the second central positioning hole (33) are located on both sides of the V-shaped osteotomy groove (36).

3. The subtrochanteric extramedullary positioning V-shaped osteotomy device for the femur according to claim 2, characterized in that: The bottom of the slide (11) is provided with a slot (12) along the length direction of the slide (11), and the slot (12) is disposed between the bottom of the slide (11) and the bottom of the slide rail (1), and the slot (12) is located below the first central positioning hole (32) and the second central positioning hole (33).

4. The subtrochanteric extramedullary positioning V-shaped osteotomy device for femoral osteotomy according to claim 2, characterized in that: The fixing hole also includes two sets of side edge positioning holes respectively disposed on both sides of the V-shaped osteotomy module (3). The side edge positioning holes include a plurality of first side edge positioning holes (34) and a plurality of second side edge positioning holes (35). The plurality of first side edge positioning holes (34) and the plurality of second side edge positioning holes (35) are respectively located on both sides of the V-shaped osteotomy groove (36).

5. The subtrochanteric extramedullary positioning V-shaped osteotomy device for femoral osteotomy according to claim 1, characterized in that: A square hole (31) is provided between the top and bottom of the V-shaped osteotomy module (3), and the square hole (31) is adapted to the connecting rod (2).

6. The subtrochanteric extramedullary positioning V-shaped osteotomy device for the femur according to claim 1, characterized in that: The position measuring device includes a side scale (22) on the side wall of the connecting rod (2) and a top scale (21) on the top of the connecting rod (2). The top of the slide rail (1) is provided with a length scale line, and the length scale line is arranged parallel to the slide groove (11). The side scale (22) and the top scale (21) are arranged corresponding to the length scale line.

7. The subtrochanteric extramedullary positioning V-shaped osteotomy device for femoral osteotomy according to claim 1, characterized in that: The anti-slip component includes a plurality of anti-slip nails (13), which are fixedly connected to the bottom of the slide rail (1).

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