An auxiliary device for intramedullary fixation of intertrochanteric fracture of femur

Abstract

The present invention discloses an auxiliary device for intramedullary fixation of intertrochanteric fracture of the femur, comprising a fixed bone plate, a first connecting portion for connecting the greater trochanter is provided at the proximal end of the fixed bone plate, a second connecting portion for connecting the femoral shaft is provided at the distal end of the fixed bone plate, a sliding hole is provided on the fixed bone plate corresponding to the intramedullary fixation device of the fracture, one end of the connecting piece passes through the sliding hole and is connected to the intramedullary fixation device of the fracture, and the outer size of the other end of the connecting piece is larger than the sliding hole. The present invention can integrate the fixed bone plate with the intramedullary fixation device of the fracture, realize the integration of the reconstruction of the outer side wall of the proximal femur and the internal intramedullary fixation device, realize the reliable fixation of the greater trochanter, and effectively avoid the failure of the intramedullary fixation device.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an auxiliary device for intramedullary fixation of intertrochanteric fractures of the femur. Background Art

[0002] Intertrochanteric fractures are fractures that mainly involve the base of the femoral neck and the lesser trochanter, accounting for about 50% of hip fractures, and mainly occur in people with osteoporosis. Surgical internal fixation is the current gold standard for the treatment of intertrochanteric fractures, especially minimally invasive surgical fixation with intramedullary nails. However, the current internal fixation devices lack effective fixation of the greater trochanter, which may result in the inability to effectively fix the greater trochanter, and complications such as fracture displacement and gluteus medius weakness may occur after surgery. Existing greater trochanter protection plates are mainly fixed in the form of ordinary locking steel plates, without taking into account the special anatomical morphology of the greater trochanter and the physiological factors of traction of multiple muscle attachment points, and the fixation effect is often poor. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an auxiliary device for intramedullary fixation of intertrochanteric fractures of the femur.

[0004] An auxiliary device for intramedullary fixation of intertrochanteric fractures of the femur comprises a fixed bone plate, wherein the proximal end of the fixed bone plate is provided with a first connecting portion for connecting to the greater trochanter, and the distal end of the fixed bone plate is provided with a second connecting portion for connecting to the femoral shaft, and a sliding hole is provided on the fixed bone plate corresponding to a fracture intramedullary fixation device, one end of a connector passes through the sliding hole and is connected to the fracture intramedullary fixation device, and the outer dimensions of the other end of the connector are larger than the sliding hole.

[0005] Preferably, the fracture intramedullary fixation device is an intramedullary nail main nail, and the connecting piece is a head nail bolt matching the intramedullary nail main nail.

[0006] Preferably, the sliding hole is a vertically arranged oblong through hole.

[0007] Preferably, in the above technical solution, the first connecting portion comprises a first connecting plate surrounding the outer side of the greater trochanter and a plurality of grabbing hooks arranged above the first connecting plate.

[0008] Preferably, in the above technical solution, the second connecting portion comprises a second connecting plate, and the second connecting plate is arranged below the first connecting plate.

[0009] Preferably, in the above technical solution, a third connecting plate extending inwardly is provided on the front side between the first connecting plate and the second connecting plate.

[0010] Preferably, in the above technical solution, the first connecting plate, the grab hook, the second connecting plate and the third connecting plate are integrally formed.

[0011] Preferably, in the above technical solution, a locking hole is provided on the first connecting portion, and a locking screw passes through the locking hole to be connected with the greater trochanter.

[0012] Preferably, the above technical solution is provided with a plurality of mutually staggered locking holes on the second connecting plate, and the locking screws pass through the locking holes to be connected with the femoral shaft.

[0013] Preferably, in the above technical solution, the first connecting portion further comprises an obliquely arranged screw, and the inclination direction of the screw is from the greater trochanter toward the lesser trochanter.

[0014] The advantages and positive effects of the present invention are as follows: the present invention provides an auxiliary device for intramedullary fixation of intertrochanteric fractures of the femur, which can achieve connection with the greater trochanter by setting a first connecting part; can achieve connection with the femoral shaft by setting a second connecting part; and can achieve firm fixation of the greater trochanter by setting a connecting piece, one end of which passes through the sliding hole of the fixed bone plate and is connected to the fracture intramedullary fixation device, so that the fixed bone plate and the fracture intramedullary fixation device are integrated into one, and reconstruction of the proximal lateral wall of the femur is integrated with the internal intramedullary fixation device, thereby achieving firm fixation of the greater trochanter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the femur;

[0016] Figure 2 The structure of the auxiliary device provided by one embodiment of the present invention is shown in FIG. Figure 1 ;

[0017] Figure 3 The structure of the auxiliary device provided by one embodiment of the present invention is shown in FIG. Figure 2 ;

[0018] Figure 4 1 is a diagram of the use status of an auxiliary device provided by an embodiment of the present invention.

[0019] Among them: 1. femoral head; 2. femoral neck; 3. piriformis fossa; 4. greater trochanter; 5. lesser trochanter; 6. intertrochanteric ridge; 7. femoral shaft; 8. sliding hole; 9. main nail of intramedullary nail; 10. head nail bolt; 11. first connecting plate; 12. grab hook; 13. locking hole; 14. second connecting plate; 15. third connecting plate; 16. screw. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 by specific circumstances.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0024] like Figure 1 As shown, the femur includes a femoral head 1, a femoral neck 2, a piriformis fossa 3, a greater trochanter 4 on the outside, a lesser trochanter 5 on the inside, an intertrochanteric crest 6 and a femoral shaft 7. This embodiment provides an auxiliary device for intramedullary fixation of intertrochanteric fractures of the femur, such as Figure 2-4 As shown, it includes a fixed bone plate, a first connecting portion for connecting to the greater trochanter is provided at the proximal end of the fixed bone plate, a second connecting portion for connecting to the femoral shaft is provided at the distal end of the fixed bone plate, a sliding hole 8 is provided on the fixed bone plate corresponding to the fracture intramedullary fixation device, one end of the connecting piece passes through the sliding hole 8 and is connected to the fracture intramedullary fixation device, and the outer dimension of the other end of the connecting piece is larger than the sliding hole 8, so that the other end of the connecting piece is stuck on the outside of the sliding hole 8, and the connection between the fixed bone plate and the fracture intramedullary fixation device is realized through the connecting piece.

[0025] Optionally, the fracture intramedullary fixation device of this embodiment is an intramedullary nail main nail 9, and the connecting piece is a head nail bolt 10 that matches the intramedullary nail main nail 9. The head bolt includes a bolt rod and a bolt cap, the bolt rod of the head nail bolt 10 can be threadedly connected with the nail head of the intramedullary nail main nail 9, the outer dimensions of the bolt cap are larger than the width of the sliding hole 8, and the bolt cap is stuck outside the sliding hole 8, thereby realizing the connection between the fixed bone plate and the intramedullary nail main nail 9.

[0026] Optionally, the sliding hole 8 is a vertically arranged oblong through hole to accommodate micro-movement of the main nail 9 of the intramedullary nail.

[0027] Specifically, the first connecting portion includes a first connecting plate 11 that embraces the outside of the greater trochanter and a plurality of grabbing hooks 12 disposed above the first connecting plate 11. In this embodiment, two side-by-side grabbing hooks 12 are disposed above the first connecting plate 11, and the grabbing hooks 12 hook the apex of the greater trochanter to increase the stability of the connection between the fixed bone plate and the greater trochanter. The grabbing hooks 12 can also be 1, 3, or 4, etc. A locking hole 13 is disposed on the first connecting portion, and a locking screw passes through the locking hole 13 to be connected to the greater trochanter. The present application does not impose specific restrictions on the position and number of the locking holes 13, which can be adaptively adjusted according to specific use.

[0028] Optionally, the second connection portion includes a second connection plate 14, which is disposed below the first connection plate 11. The width of the second connection plate 14 is smaller than the width of the first connection plate 11; the second connection plate 14 is provided with a plurality of mutually staggered locking holes 13, and the locking screw avoids the main intramedullary nail 9 and passes through the locking holes 13 to connect with the femoral shaft.

[0029] In order to treat the coronal fracture, a third connecting plate 15 extending inward is provided on the front side between the first connecting plate 11 and the second connecting plate 14. The third connecting plate 15 is provided with a locking hole 13, and a locking screw is provided in the locking hole 13. The third connecting plate 15 is designed on the back side for fixing the bone plate and reconstructing the posterior medial wall, and can be removed during surgery when not needed.

[0030] Optionally, the first connecting plate 11 , the grab hook 12 , the second connecting plate 14 and the third connecting plate 15 are integrally formed.

[0031] In order to further improve the stability of the connection between the greater trochanter and the fixed bone plate, the first connecting portion may further include an inclined screw 16, and the inclined direction of the screw 16 is from the greater trochanter to the lesser trochanter. Specifically, in this embodiment, a corresponding locking hole 13 for connecting the screw 16 is provided on the first connecting plate 11 above the middle of the locking hole 13, and the screw 16 passes through the locking hole 13 and is driven into the greater trochanter from the greater trochanter to the lesser trochanter.

[0032] The material of this embodiment is titanium alloy. Except for the middle sliding hole 8, the rest are locking holes 13, and a 3.5 specification locking screw series is used. The proximal end has a screw facing the lesser trochanter of the femur, and the proximal end adopts a double hook design for reinforcement connection; the middle wider and longer sliding hole 8 is connected to the nail head of the main nail 9 of the intramedullary nail through the head nail bolt 10; the distal end uses a double row of screws to avoid the main nail 9 of the intramedullary nail and connect to the femoral shaft.

[0033] The working process of this embodiment is as follows: after the surgical internal fixation device is installed, the first connection part of the auxiliary device is installed corresponding to the greater trochanter, the second connection part is installed corresponding to the femoral shaft, and the head nail bolt 10 is passed through the sliding hole 8 and threadedly connected with the nail head of the intramedullary nail main nail 9 of the surgical internal fixation device. This embodiment is suitable for patients with simultaneous fractures of the inner and outer sides of the femoral intertrochanteric fractures, and the outer wall of the greater trochanter is reconstructed by fixing the bone plate to avoid the risk of failure of the intramedullary nail.

[0034] The advantages and positive effects of the present invention are as follows: the present invention provides an auxiliary device for intramedullary fixation of intertrochanteric fractures of the femur, which can achieve connection with the greater trochanter by setting a first connecting part; can achieve connection with the femoral shaft by setting a second connecting part; and can achieve firm fixation of the greater trochanter by setting a connecting piece, one end of which passes through the sliding hole 8 of the fixed bone plate and is connected to the fracture intramedullary fixation device, so that the fixed bone plate and the fracture intramedullary fixation device are integrated into one, and reconstruction of the proximal lateral wall of the femur is integrated with the internal intramedullary fixation device, thereby achieving firm fixation of the greater trochanter.

[0035] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An auxiliary device for intramedullary fixation of intertrochanteric fracture of the femur, characterized in that: It comprises a fixed bone plate, wherein the proximal end of the fixed bone plate is provided with a first connecting portion for connecting to the greater trochanter, the distal end of the fixed bone plate is provided with a second connecting portion for connecting to the femoral shaft, the fixed bone plate is provided with a sliding hole corresponding to the fracture intramedullary fixation device, the sliding hole is arranged along the length direction of the femoral shaft corresponding to the lower end of the greater trochanter, one end of the connecting piece passes through the sliding hole and is connected to the fracture intramedullary fixation device, and the outer size of the other end of the connecting piece is larger than the sliding hole; the fracture intramedullary fixation device is an intramedullary nail main nail, and the connecting piece is a head nail bolt matching the intramedullary nail main nail; the first connecting portion comprises a first connecting plate surrounding the outer side of the greater trochanter and a plurality of grab hooks arranged above the first connecting plate.

2. The auxiliary device for intramedullary fixation of intertrochanteric fracture of femur according to claim 1, characterized in that: The sliding hole is an oblong through hole arranged vertically.

3. The auxiliary device for intramedullary fixation of intertrochanteric fracture of femur according to claim 1, characterized in that: The second connecting portion includes a second connecting plate, and the second connecting plate is arranged below the first connecting plate.

4. The auxiliary device for intramedullary fixation of intertrochanteric fracture of femur according to claim 3, characterized in that: A third connecting plate extending inward is provided on the front side between the first connecting plate and the second connecting plate.

5. The auxiliary device for intramedullary fixation of intertrochanteric fracture of femur according to claim 4, characterized in that: The first connecting plate, the grab hook, the second connecting plate and the third connecting plate are integrally formed.

6. The auxiliary device for intramedullary fixation of intertrochanteric fracture of femur according to claim 1, characterized in that: The first connecting portion is provided with a locking hole, and the locking screw passes through the locking hole and is connected to the greater trochanter.

7. The auxiliary device for intramedullary fixation of intertrochanteric fracture of femur according to claim 3, characterized in that: The second connecting plate is provided with a plurality of mutually staggered locking holes, and the locking screws pass through the locking holes to be connected with the femoral shaft.

8. The auxiliary device for intramedullary fixation of intertrochanteric fracture of femur according to claim 1, characterized in that: The first connection portion further comprises a screw which is arranged obliquely, and the oblique direction of the screw is from the greater trochanter toward the lesser trochanter.

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