Annular positioning belt for reconstructing outer side wall of A3 type intertrochanteric fracture

Abstract

The utility model discloses an annular positioning belt for reconstructing the outer side wall of A3 type intertrochanteric fracture, and relates to the field of fracture auxiliary recovery devices. The positioning device comprises a plurality of positioning through hole blocks which are annularly arranged, and the adjacent positioning through hole blocks are sequentially connected through first positioning strips to form a positioning annular belt; the first end of the positioning through hole block is used as a contact end with the outer side wall of a fracture, the second end of the positioning through hole block is far away from the first end, and at least one side of the first positioning strip and the first end are located on the same plane; a positioning nail limiting table is constructed on the inner wall of the second end of the positioning through hole block; the problem that in the prior art, an auxiliary positioning device for the outer side wall fracture is poor in positioning effect is solved.

Description

Technical Field

[0001] The utility model relates to the field of fracture auxiliary recovery devices, in particular to an annular positioning belt for reconstructing the outer wall of A3 type femoral intertrochanteric fracture. Background Art

[0002] Intertrochanteric fracture, also known as intertrochanteric fracture, often occurs in the elderly and is one of the most common hip fractures in clinical practice. According to domestic statistics, it accounts for about 35.7% of hip fractures. The elderly often have osteoporosis, decreased reaction ability, and poor hip muscle protection. They are more likely to fracture under slight external force than young people, and the incidence of hip fractures continues to increase. Related literature reports that intertrochanteric fractures account for up to 50% of hip fractures. Although the healing rate of intertrochanteric fractures is high, conservative treatment requires long-term bed rest, which has many complications, high mortality and disability rates. Surgical treatment should be taken as soon as possible in the absence of surgical contraindications. Surgical treatment can achieve anatomical reduction, improve stability, reduce mortality, reduce hip varus deformity, and restore joint function as soon as possible. At present, intramedullary fixation has become the main treatment for unstable intertrochanteric fractures, but intertrochanteric fractures with lateral wall fractures still have a high failure rate and complication rate.

[0003] The concept of research on the lateral wall of the femoral trochanteric region has only been proposed in recent years, especially its impact on the stability of internal fixation of intertrochanteric fractures. Insufficient fixation of lateral wall fractures or inappropriate internal fixation methods will lead to loss of fracture reduction, resulting in limb shortening, shortened hip abduction torque, and loss of pelvic balance. Currently, the commonly used methods for lateral wall reconstruction are: ① Wire or titanium cable binding combined with intramedullary fixation. Wire or titanium cable cerclage is simple to operate, minimally invasive, and economical, and can effectively maintain fracture reduction; the disadvantage is that there is a lot of soft tissue stripping and insufficient stability, which is not suitable for patients with lateral wall comminuted. ② Additional reconstruction plate to reconstruct the lateral wall. This method is simple to operate and has good stability. It can reduce postoperative fracture displacement, improve the function of the affected limb, and help fracture healing; the disadvantage is that the plate needs to avoid the position where the spiral blade is placed. Some patients need two plates, which cannot fully and effectively fix all comminuted fracture fragments. ③ Use the proximal greater trochanter plate reverse-DFLCP fixation, but due to the large amount of soft tissue stripping and extramedullary fixation, recent studies have found that its failure rate is high.

[0004] Therefore, it is necessary to develop an annular positioning band for reconstructing the lateral wall of A3 type intertrochanteric fracture to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an annular positioning belt for reconstructing the lateral wall of A3 type femoral intertrochanteric fracture, so as to solve the problem of poor positioning effect of auxiliary positioning devices for lateral wall fracture in the prior art.

[0006] In order to solve the above problems, the utility model adopts the following technical means:

[0007] An annular positioning band for reconstructing the lateral wall of A3 type intertrochanteric fracture of the femur, comprising:

[0008] A plurality of positioning through-hole blocks are arranged in a ring shape, and adjacent positioning through-hole blocks are sequentially connected by a first positioning strip to form a positioning ring belt;

[0009] The first end of the positioning through-hole block serves as a contact end with the outer wall of the fracture, the second end of the positioning through-hole block is arranged away from the first end, and at least one side of the first positioning strip is in the same plane as the first end;

[0010] The inner wall of the second end of the positioning through-hole block is configured with a positioning nail limiting platform.

[0011] Preferably, the positioning through-hole block comprises a first block as a head end, a second block as a tail end, and a third block located between the first block and the second block;

[0012] Between the first block and the second block, the number of the third blocks arranged along the clockwise direction is the same as the number of the third blocks arranged along the counterclockwise direction;

[0013] The first block serves as an installation positioning end, the second block serves as a connecting section, and the second block is connected to the reinforced through-hole block via a second positioning strip.

[0014] Furthermore, the two first positioning bars and the second positioning bar connected to the outer wall of the second block are adjacently arranged at 120 degrees.

[0015] Furthermore, one side of the second positioning strip and the first end of the second block are arranged on the same horizontal plane.

[0016] Furthermore, the inner wall at one end of the second block is also constructed with the positioning nail limit platform.

[0017] Furthermore, the positioning pin limiting platform is a circular table top.

[0018] During use, the utility model has the following beneficial effects:

[0019] During use, the present application covers the fractured parts on both sides of the fracture line through the first positioning strip, and makes the first positioning strip fit with the outer wall of the fracture, and uses the positioning screw to pass through the positioning through-hole block, and after the screw is nailed into the bone, the entire annular positioning strip is fixed to the outer wall of the fracture. It is helpful for fracture reduction, has more nail holes, can fix the outer wall fracture fragments that need to be fixed according to the changes of the fracture, reconstruct the outer wall, improve the stability of the fracture, and the middle of the ring does not affect the placement of the spiral blade, which helps patients get out of bed early after surgery and shortens the fracture healing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the main structure of the utility model.

[0022] Figure 3 for Figure 2 Schematic diagram of the AA section structure.

[0023] Among them, 1-positioning through hole block, 2-first positioning strip, 3-positioning nail limit platform, 4-first block, 5-second block, 6-third block, 7-second positioning strip, 8-reinforcement through hole block. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Please refer to Figures 1 to 3 As shown, a circular positioning band for reconstructing the lateral wall of A3 type intertrochanteric fracture of the femur comprises:

[0031] A plurality of positioning through-hole blocks 1 are arranged in a ring shape, and adjacent positioning through-hole blocks 1 are sequentially connected by first positioning strips 2 to form a positioning ring belt;

[0032] The first end of the positioning through-hole block 1 serves as a contact end with the outer wall of the fracture, the second end of the positioning through-hole block 1 is arranged away from the first end, and at least one side of the first positioning strip 2 is in the same plane as the first end;

[0033] A positioning pin limiting platform 3 is constructed on the inner wall of the second end of the positioning through-hole block 1 .

[0034] Thus, during use, the present application covers the fractured parts on both sides of the fracture line through the first positioning strip 2, and allows the first positioning strip 2 to fit the outer wall of the fracture, and uses the positioning screw to pass through the positioning through-hole block 1, and after the screw is nailed into the bone, the entire annular positioning strip is fixed to the outer wall of the fracture. It is helpful for fracture reduction, has more nail holes, can fix the outer wall fracture fragments that need to be fixed according to the changes of the fracture, reconstruct the outer wall, improve the stability of the fracture, and the middle of the ring does not affect the placement of the spiral blade, which helps the patient get out of bed early after surgery and shortens the fracture healing time.

[0035] At the same time, a positioning and limiting table is used to limit the installation of screws to prevent the screws from being inserted too deep and affecting the patient's recovery.

[0036] Furthermore, the positioning through-hole block 1 includes a first block 4 as a head end, a second block 5 as a tail end, and a third block 6 located between the first block 4 and the second block 5;

[0037] Between the first block 4 and the second block 5, the number of the third blocks 6 arranged along the clockwise direction is the same as the number of the third blocks 6 arranged along the counterclockwise direction;

[0038] The first block 4 serves as an installation positioning end, the second block 5 serves as a connecting section, and the second block 5 is connected to the reinforced through-hole block 8 via a second positioning strip 7 .

[0039] Thereby, the positioning stability of the entire positioning belt is increased, and screws are installed at the positions of the reinforced through-hole blocks 8 to achieve stable fixation.

[0040] Furthermore, the two first positioning strips 2 and the second positioning strip 7 connected to the outer wall of the second block 5 are adjacently arranged at 120°.

[0041] Meanwhile, one side of the second positioning strip 7 and the first end of the second block 5 are arranged on the same horizontal plane.

[0042] Furthermore, the inner wall at one end of the second block 5 is also constructed with the positioning nail limiting platform 3.

[0043] Specifically, the positioning pin limiting platform 3 is a circular table surface.

[0044] Before the operation, the utility model needs to be 3D printed according to the patient's bone type, so that the positioning ring formed by the first positioning strip 2 can fit the patient's lateral bone. Even if a small amount of non-fitting is found during the operation, the positioning ring can be fitted with the patient's fracture lateral wall by installing screws. The aforementioned positioning and limiting platform can be installed according to the depth of the screws required by the patient. When the overall customization is performed, the distance between the top surface of the positioning nail limiting platform 3 and the hole opening can be determined according to actual needs.

[0045] Specifically, the surgical operation process of the present application is as follows: the patient lies in a supine position on a traction bed, and the healthy side is fixed in an abducted position with hip flexion and knee flexion. The affected side is tractioned in an abducted position and gradually adducted and internally rotated for reduction. If closed reduction fails twice, no repeated attempts are made. Limited open incision is performed during the operation to assist reduction. A 7-cm incision was made at the incision position where the head and neck nail was inserted to expose the lateral wall fracture. The lateral wall was reset by rotating the distal limb and clamping, and a circular positioning band was inserted. According to the fracture position, screws were inserted to fix and reconstruct the lateral wall to transform the A3 type fracture into an A2 or A1 type fracture. Then a 3-4 cm incision was made on the lateral side of the femur above the apex of the greater trochanter. The skin and fascia were cut in sequence. The apex of the greater trochanter was slightly medial as the entry point to insert the guide pin. The fluoroscopy confirmed that the guide pin was in the right position. The proximal medullary was expanded along the guide pin opening. The PFNA main nail of the appropriate diameter and length was selected and gently screwed in. After the fluoroscopy showed that the main nail position was satisfactory, the spiral blade guide pin was inserted with the assistance of the aimer. The fluoroscopy confirmed that the guide pin position was satisfactory. The spiral blade of the appropriate length was selected, and the lateral cortex was expanded and inserted into the femoral head. Finally, the distal locking screw was placed.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An annular positioning band for reconstructing the lateral wall of A3 type intertrochanteric fracture, characterized in that: include: A plurality of positioning through-hole blocks (1) are arranged in a ring shape, and adjacent positioning through-hole blocks (1) are connected in sequence via first positioning strips (2) to form a positioning ring belt; The first end of the positioning through-hole block (1) serves as a contact end with the outer wall of the fracture, the second end of the positioning through-hole block (1) is arranged away from the first end, and at least one side of the first positioning strip (2) is in the same plane as the first end; The inner wall of the second end of the positioning through-hole block (1) is configured with a positioning nail limiting platform (3).

2. The annular positioning band for reconstructing the lateral wall of A3 type intertrochanteric fracture according to claim 1, characterized in that: The positioning through-hole block (1) comprises a first block (4) as a head end, a second block (5) as a tail end, and a third block (6) located between the first block (4) and the second block (5); Between the first block (4) and the second block (5), the number of the third blocks (6) arranged in the clockwise direction is the same as the number of the third blocks (6) arranged in the counterclockwise direction; The first block (4) serves as an installation positioning end, the second block (5) serves as a connecting section, and the second block (5) is connected to the reinforcement through-hole block (8) via a second positioning strip (7).

3. The annular positioning band for reconstructing the lateral wall of A3 type intertrochanteric fracture according to claim 2, characterized in that: The two first positioning strips (2) and the second positioning strip (7) connected to the outer wall of the second block (5) are adjacently arranged at 120 degrees.

4. The annular positioning band for reconstructing the lateral wall of A3 type intertrochanteric fracture according to claim 2 or 3, characterized in that: One side of the second positioning strip (7) and the first end of the second block (5) are arranged on the same horizontal plane.

5. The annular positioning band for reconstructing the lateral wall of A3 type intertrochanteric fracture according to claim 2, characterized in that: The inner wall at one end of the second block (5) is also configured with the positioning nail limiting platform (3).

6. The annular positioning band for reconstructing the lateral wall of A3 type intertrochanteric fracture according to claim 1, characterized in that: The positioning pin limiting platform (3) is a circular platform.

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