Femoral multi-dimensional interlocking intramedullary nail structure with lock
By using a multidimensional interlocking intramedullary nail structure for the femur and incorporating cortical bone screws, the problem of poor fixation in proximal femoral fractures has been solved, resulting in more robust internal fixation and simplified surgical procedures.
Patent Information
- Application Number
- CN202511898329.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-02-06
AI Technical Summary
Existing intramedullary nailing techniques for the femur are not effective in treating proximal femoral fractures, especially those involving split fractures of the lateral wall of the greater trochanter and small fracture fragments around the greater trochanter, and are prone to internal fixation failures such as nail dislodgement and nail breakage.
The femoral multidimensional interlocking intramedullary nail structure is adopted, with the addition of two cortical bone screws, which are respectively directed from the posterolateral aspect of the greater trochanter of the femur to the anteromedial aspect and from the anterolateral aspect to the posteromedial aspect, forming a spatial multidimensional interlocking, enhancing the fixation effect on the proximal femur, and achieving detachable connection through the design of the aiming bracket and cannula, simplifying the surgical procedure.
It improves the fixation strength for proximal femoral fractures, prevents screw dislodgement and breakage due to poor handling, ensures the effectiveness of internal fixation, simplifies the surgical procedure, and improves operational reliability.
Smart Images
Figure CN121465709A_ABST
Abstract
Description
Technical Field
[0001] This application relates to orthopedic devices, and more particularly to a femoral multidimensional interlocking intramedullary nail structure. Background Technology
[0002] With the increasing complexity and diversity of fractures, the proportion of open fractures caused by various high-energy injuries is increasing year by year. Therefore, internal fixation surgery has become the preferred treatment method for fracture patients, and the emergence of intramedullary nailing technology has revolutionized the understanding of internal fixation surgery.
[0003] Intramedullary nailing surgery, with its closed and minimally invasive techniques, reduces the surgical infection rate; central fixation replaces the traditional locking plate bridging fixation, effectively avoiding secondary fractures caused by stress shielding.
[0004] The proximal femoral nail with locking mechanism is generally suitable for most femoral fractures, such as intertrochanteric fractures, subtrochanteric fractures, and femoral neck and shaft fractures. However, for some patients with osteoporosis, or those with split fractures of the lateral wall of the greater trochanter, especially for small fracture fragments with comminuted fractures in the proximal femur, a single spiral blade is insufficient for effective handling. Summary of the Invention
[0005] The purpose of this invention is to provide a multidimensional interlocking intramedullary nail structure for the femur, which provides stronger internal fixation for proximal femoral fractures accompanied by split fractures of the lateral wall of the greater trochanter and small fracture fragments around the greater trochanter, and can effectively prevent internal fixation failures such as nail slippage or breakage due to poor holding.
[0006] To achieve the above objectives, the present invention provides the following technical solution.
[0007] This application discloses a femoral multidimensional interlocking intramedullary nail structure, including an aiming bracket. The top of the aiming bracket is connected to one end of a connecting handle, and the other end of the connecting handle is connected to the intramedullary nail. The top two sides of the aiming bracket are respectively connected to one end of a left bracket and one end of a right bracket. A left sleeve is inserted into the other end of the left bracket, and a right sleeve is inserted into the other end of the right bracket. A left cross nail is connected to the end of the left sleeve, and a right cross nail is connected to the end of the right sleeve. An aiming tube is inserted into the bottom of the aiming bracket, and a blade nail is connected to the end of the aiming tube.
[0008] The intramedullary nail is inserted from the greater trochanter of the femur into the femoral body, the blade nail is inserted from one side of the femoral body into the femoral head, and the left and right cross nails are inserted into the femur from the greater trochanter of the femur.
[0009] Preferably, in the above-described femoral multidimensional interlocking intramedullary nail structure, the connecting handle is detachably connected to the intramedullary nail.
[0010] Preferably, in the above-described femoral multidimensional interlocking intramedullary nail structure, the left sleeve is detachably connected to the left cross nail, and the right sleeve is detachably connected to the right cross nail.
[0011] Preferably, in the above-described femoral multidimensional interlocking intramedullary nail structure, the blade nail is detachably connected to the aiming tube.
[0012] Preferably, in the above-mentioned femoral multidimensional interlocking intramedullary nail structure, the left support, right support, and aiming support are respectively provided with positioning holes for inserting the left sleeve, right sleeve, and aiming tube.
[0013] Preferably, in the above-described femoral multidimensional interlocking intramedullary nail structure, a distal locking screw is connected below the intramedullary nail, and a distal positioning hole is formed on the aiming bracket for positioning and inserting the distal locking screw.
[0014] Preferably, in the above-described femoral multidimensional interlocking intramedullary nail structure, the left interlocking nail points from the anterolateral aspect of the greater trochanter of the femur to the posteromedial aspect, and the right interlocking nail points from the posterolateral aspect of the greater trochanter of the femur to the anteromedial aspect.
[0015] Compared with existing technologies, the advantages of this technical solution are as follows: Two cortical bone screws are added, one pointing from the posterolateral aspect of the greater trochanter to the anteromedial aspect, and the other from the anterolateral aspect of the greater trochanter to the posteromedial aspect. These two cortical bone locking screws and the spiral blade screw form a multi-dimensional spatial interlocking structure that does not interfere with each other. This provides stronger internal fixation for proximal femoral fractures accompanied by split fractures of the lateral wall of the greater trochanter and small fracture fragments around the greater trochanter, effectively preventing internal fixation failure due to poor holding, such as screw slippage or breakage. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 The diagram shown is a schematic diagram of the use of the femoral multidimensional interlocking intramedullary nail structure in an embodiment of the present invention;
[0018] Figure 2 The image shown is a three-dimensional view of the femoral multidimensional interlocking intramedullary nail structure in an embodiment of the present invention. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Combination Figure 1-2 As shown, the femoral multidimensional interlocking intramedullary nail structure 100 includes an aiming bracket 101. The top of the aiming bracket 101 is connected to one end of a connecting handle 102, and the other end of the connecting handle 102 is connected to the intramedullary nail 103. The top two sides of the aiming bracket 101 are respectively connected to one end of a left bracket 104 and one end of a right bracket 105. A left sleeve 106 is inserted into the other end of the left bracket 104, and a right sleeve 107 is inserted into the other end of the right bracket 105. A left cross nail 108 is connected to the end of the left sleeve 106, and a right cross nail 109 is connected to the end of the right sleeve 107. An aiming tube 110 is inserted into the bottom of the aiming bracket 101, and a blade nail 111 is connected to the end of the aiming tube 110. 102 is detachably connected to the intramedullary nail 103; the left sleeve 106 is detachably connected to the left cross nail 108; the right sleeve 107 is detachably connected to the right cross nail 109; and the blade nail 111 is detachably connected to the aiming tube 110. Positioning holes 112 for inserting the left sleeve 106, right sleeve 107, and aiming tube 110 are formed on the left support 104, right support 105, and aiming support 101, respectively. A distal locking nail 113 is connected below the intramedullary nail 103. A distal positioning hole 114 is formed on the aiming support 101 for positioning and inserting the distal locking nail 113. The left cross nail 108 points from the anterolateral aspect of the greater trochanter of the femur to the posteromedial aspect, and the right cross nail 109 points from the posterolateral aspect of the greater trochanter of the femur to the anteromedial aspect.
[0021] Intramedullary nail 103 is inserted into the femoral body from the greater trochanter of the femur 200. Blade nail 111 is inserted into the femoral head from one side of the femoral body. Left cross nail 108 and right cross nail 109 are inserted into the femur from the greater trochanter of the femur.
[0022] In this technical solution, an intramedullary nail is placed along with two cortical bone screws, one pointing from the posterolateral aspect of the greater trochanter of the femur to the anteromedial aspect, and the other pointing from the anterolateral aspect of the greater trochanter of the femur to the posteromedial aspect. The two cortical bone locking screws and the spiral blade screws form a multidimensional spatial interlocking without interfering with each other, and the screws can be selectively inserted according to the distribution of the fracture line.
[0023] Through the interlocking design, it can hold proximal femoral fractures accompanied by split fractures of the lateral wall of the greater trochanter and small fracture fragments around the greater trochanter, thereby achieving stronger internal fixation and effectively preventing internal fixation failures such as screw slippage or breakage due to poor holding.
[0024] Moreover, all positioning holes, cannulas, and screws are pre-positioned, allowing for direct insertion during surgery, saving surgical time. They can also be easily removed after insertion, making the operation simple and reliable.
[0025] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.
Claims
1. A femoral multidimensional interlocking intramedullary nail structure, characterized in that, The device includes an aiming bracket, the top of which is connected to one end of a connecting handle, the other end of which is connected to an intramedullary nail. The top two sides of the aiming bracket are respectively connected to one end of a left bracket and one end of a right bracket. A left sleeve is inserted into the other end of the left bracket, and a right sleeve is inserted into the other end of the right bracket. A left cross nail is connected to the end of the left sleeve, and a right cross nail is connected to the end of the right sleeve. An aiming tube is inserted into the bottom of the aiming bracket, and a blade nail is connected to the end of the aiming tube. The intramedullary nail is inserted from the greater trochanter of the femur into the femoral body, the blade nail is inserted from one side of the femoral body into the femoral head, and the left and right cross nails are inserted into the femur from the greater trochanter of the femur.
2. The femoral multidimensional interlocking intramedullary nail structure according to claim 1, characterized in that, The connecting handle is detachably connected to the intramedullary nail.
3. The femoral multidimensional interlocking intramedullary nail structure according to claim 1, characterized in that, The left sleeve is detachably connected to the left cross pin, and the right sleeve is detachably connected to the right cross pin.
4. The femoral multidimensional interlocking intramedullary nail structure according to claim 1, characterized in that, The blade pin is detachably connected to the aiming tube.
5. The femoral multidimensional interlocking intramedullary nail structure according to claim 1, characterized in that, The left support, right support, and aiming support are respectively provided with positioning holes for inserting the left sleeve, right sleeve, and aiming tube.
6. The femoral multidimensional interlocking intramedullary nail structure according to claim 1, characterized in that, A distal locking screw is connected below the intramedullary nail, and a distal positioning hole is formed on the aiming bracket for positioning and driving the distal locking screw.
7. The femoral multidimensional interlocking intramedullary nail structure according to claim 1, characterized in that, The left cross nail extends from the anterolateral aspect of the greater trochanter of the femur to the posteromedial aspect, and the right cross nail extends from the posterolateral aspect of the greater trochanter of the femur to the anteromedial aspect.