Wrist fracture fixing device
Through the front and rear arc-shaped fixation frames and pull rod structure, combined with carbon fiber material and adjustable angle connector, the problems of abnormal wrist bone recovery and bone atrophy caused by existing wrist bone fixation devices are solved, and efficient healing and functional recovery are achieved.
Patent Information
- Application Number
- CN202422309327.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-09-23
AI Technical Summary
Existing carpal fixation devices can easily lead to abnormal recovery and bone atrophy of the carpal area when treating distal radius fractures, affecting healing and functional recovery.
It adopts anterior and posterior arc-shaped fixation frame and pull rod structure, combined with carbon fiber material and adjustable angle connector, uses Kirschner wire to fix the radius and carpal bone, and is supported by a support rod to increase micro-motion to promote healing.
It improves the healing quality and functional recovery of the wrist bone, reduces the weight burden on the arm, avoids bone atrophy, and meets the fixation needs of different angles.
Smart Images
Figure CN223380630U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a fracture fixing device, in particular to a wrist fracture fixing device. Background Art
[0002] The incidence of distal radius fractures is very high, which seriously threatens human health and living standards. The external fixator suitable for wrist fixation and treatment of distal radius fractures at home and abroad is a single-arm frame. Single-arm frames are all fixed with screws in the form of half-pins, with fixation as the main function. The existing patent number is 2011101780651, a combined wrist joint three-dimensional traction fixation frame, which uses Kirschner needles to fix the metacarpal neck and radius in three dimensions. However, in actual application, if the radius and carpal bones are fractured, the metacarpal bones naturally droop, which directly affects the normal recovery of the carpal bones. In addition, since the two arc-shaped rings are fixed by connecting rods, long-term fixation can easily cause bone atrophy, which is not conducive to healing and functional recovery. Summary of the Invention
[0003] The utility model provides a wrist fracture fixation device which has a simple structure and can ensure normal healing of wrist bone fractures and functional recovery.
[0004] The technical solution adopted by the utility model is: a wrist fracture fixation device, characterized in that: it includes front and rear arc-shaped fixing frames, a plurality of arc-shaped connecting holes are opened on the front and rear arc-shaped fixing frames along the arc direction, two pulling rods are respectively connected in the arc-shaped connecting holes corresponding to the front and rear directions on the two groups of front and rear arc-shaped fixing frames to be pulled and fixed to the front and rear arc-shaped fixing frames, the pulling rod includes a front connecting seat, a front locking nut, a pulling rod, a rear connecting seat and a rear locking nut, the front shaft section of the front connecting seat is forwardly passed through the arc-shaped connecting hole of the front arc-shaped fixing frame and is spirally screwed with the front locking nut for fixation, the rear connecting head of the front connecting seat is hinged to the connecting head at the front end of the pulling rod through a pin shaft perpendicular to the front and rear directions, the rear end of the pulling rod is passed through the arc-shaped connecting hole of the rear arc-shaped fixing frame and is pulled from front and back toward the rear arc-shaped fixing frame through the rear connecting seat and the rear locking nut. The connection is fixed by spiral rotation; two groups of rear nut assemblies are passed through any two arc-shaped connecting holes on both sides of the distal end of the radius on the rear arc-shaped fixing frame, and the two ends of the first Kirschner wire that passes through and fixes the radius are respectively pressed onto the front or rear end surface of the rear arc-shaped fixing frame through the nuts of the two groups of rear nut assemblies; two groups of front nut assemblies are passed through any two arc-shaped connecting holes on both sides of the carpal bone or metacarpal bone on the front arc-shaped fixing frame, and the two ends of the second Kirschner wire that passes through and fixes the carpal bone or metacarpal bone are pressed onto the front or rear end surface of the front arc-shaped fixing frame through the nuts of the two groups of front nut assemblies; two groups of supporting nut assemblies are also passed through any two arc-shaped connecting holes on both sides of the carpal bone or metacarpal bone on the front arc-shaped fixing frame, and the two ends of the support rod that lifts up the carpal bone or metacarpal bone are respectively passed through the screw sections of the two groups of support nut assemblies and are pressed and locked by nuts.
[0005] Furthermore, an intermediate fixing frame is also connected to the arc-shaped connecting hole in the middle of the rear arc-shaped fixing frame. The rear axis section of the intermediate fixing frame is connected to the rear arc-shaped fixing frame backward and is screwed and locked with a nut on the outside of the arc-shaped connecting hole. A plurality of fixed connecting holes are provided on the intermediate fixing frame along the front-to-back direction. The intermediate nut assembly is connected to the fixed connecting hole. The upper end of the third Kirschner wire that is connected to the radius downward is pressed onto the intermediate fixing frame through the nut of the intermediate nut assembly.
[0006] Furthermore, the front and rear nut assemblies include a screw and a nut, or a bolt and two nuts, and an arc-shaped press-fit groove corresponding to the second and first Kirschner wire arcs is opened on the inner end surface of the nut, or an arc-shaped press-fit groove corresponding to the second and first Kirschner wire arcs is opened on the inner end surface of the screw head.
[0007] Furthermore, the intermediate nut assembly includes a screw and a nut, or a bolt and two nuts, and an arc-shaped press-fit groove corresponding to the arc of the third Kirschner wire is opened on the inner end surface of the nut, or an arc-shaped press-fit groove corresponding to the arc of the third Kirschner wire is opened on the inner end surface of the screw head.
[0008] Furthermore, the arc-shaped pressing groove on the inner end surface of the head of the screw is provided at the connection between the head and the rod, and the outer wall of the rod is provided with an arc-shaped connecting groove corresponding to the arc of the Kirschner wire.
[0009] Furthermore, an axial supporting rod through-slot is formed through one or both ends of the supporting rod, and the screw section of the supporting nut assembly is passed through the supporting rod through-slot and fixed by crimping with a nut.
[0010] Furthermore, a spring section is provided at any position other than the front end of the pull rod.
[0011] Furthermore, the rear end of the pull rod is connected to one end of a spring, and the other end of the spring is connected to a nut or a bolt. The nut is passed through the arc-shaped connecting hole of the rear arc-shaped fixing plate by a rear locking screw and then screwed and locked. The bolt is passed through the arc-shaped connecting hole of the rear arc-shaped fixing plate and then screwed and locked by a rear locking nut.
[0012] Furthermore, the front and rear arc-shaped fixing frames, the pull rod and the supporting rod are made of carbon fiber material.
[0013] Furthermore, the intermediate fixing frame is made of carbon fiber.
[0014] By adopting the above technical solution, the beneficial effects of the utility model are:
[0015] 1. The use of carbon fiber material helps to reduce the weight on the forearm and wrist and improve the quality of recovery.
[0016] 2. The connector at the front end of the pull rod is pinned to the rear connector of the front connecting seat, which ensures that the relative angles of the front and rear arc-shaped fixing plates can be adjusted during assembly, meeting the requirements of inserting the first and second Kirschner wires at different angles and improving the applicability of the device.
[0017] 3. The pull rod can adopt a structure with a spring section to increase the micro-motion after fixation, avoid bone atrophy caused by long-term fixation, and promote healing and functional recovery.
[0018] 4. Use a support rod to lift the carpal bone or metacarpal bone upwards. The position of the support rod can be moved in the support rod slot to meet the support needs of different positions, which is beneficial to improving the recovery effect and quality of the carpal bone and metacarpal bone. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention in use;
[0020] Figure 2 This is a left side view of the front arc-shaped fixing frame of the present invention in use;
[0021] Figure 3 This is a schematic structural diagram of the front connecting seat of the present invention;
[0022] Figure 4 This is a left side view of the rear arc-shaped fixing frame of the present invention in use;
[0023] Figure 5 for Figure 4 Right side view;
[0024] Figure 6 Schematic diagram of the structure of the curved fixing plate after the right pull rod of the present invention is locked by the rear connecting bolt through the spring;
[0025] Figure 7 It is a schematic structural diagram of the front nut assembly of the present invention.
[0026] In the figure: radius 1, ulna 2, carpal bone 3, metacarpal bone 4, front arc-shaped fixing frame 5, front arc-shaped connecting hole 6, front connecting seat 7, front shaft section 71, rear connecting head 72, front locking nut 8, left pull rod 9, pull rod connecting head 91, rear connecting seat 10, rear locking nut 11, rear nut assembly 12, first Kirschner wire 13, front nut assembly 14, second Kirschner wire 15, intermediate fixing frame 16, fixed connecting hole 161, intermediate nut assembly 17, third Kirschner wire 18, right pull rod 19, spring 20, rear connecting bolt 21, support rod 22, support rod through groove 23, support nut assembly 24, rear arc-shaped fixing frame 25, rear arc-shaped connecting hole 26, arc-shaped pressing through groove 27, arc-shaped through-connecting groove 28. DETAILED DESCRIPTION
[0027] The following is further explained with reference to the accompanying drawings.
[0028] Figure 1-6 As shown, a wrist fracture fixation device includes a front arc-shaped fixing frame 5, a front connecting seat 7, a front locking nut 8, a left pull rod 9, a rear connecting seat 10, a rear locking nut 11, a rear nut assembly 12, a first Kirschner wire 13, a front nut assembly 14, a second Kirschner wire 15, an intermediate fixing frame 16, an intermediate nut assembly 17, a third Kirschner wire 18, a right pull rod 19, a spring 20, a rear connecting bolt 21, a support rod 22, a support rod through groove 23, a support nut assembly 24, and a rear arc-shaped fixing frame 25.
[0029] The front and rear arc-shaped fixing frames 5 and 25 are provided with a plurality of front and rear arc-shaped connecting holes 6 and 26 respectively along the arc direction. The rear sides of the two front arc-shaped connecting holes on the left and right sides of the front arc-shaped fixing frame 5 are both connected with the front shaft section 71 of the front connecting seat 7 and locked at the front side by the front locking nut 8 (such as Figure 2 、 3 ), the rear connecting head 72 of the front connecting seat 7 is hingedly connected to the connecting head 91 of the front ends of the left and right pull rods 9 and 19 through a pin shaft perpendicular to the front and rear directions, the rear end of the left pull rod 9 passes through the rear arc connecting hole 26 on the left side of the rear arc fixing frame 25, and the left pull rod 9 is spirally screwed and fixed from the front and rear toward the rear arc fixing frame 25 through the rear connecting seat 10 and the rear locking nut 11 (as shown in FIG. Figure 4 、 5 ), the rear end of the right pull rod 19 is connected to the rear connecting bolt 21 through the spring segment 20, the rear connecting bolt 21 passes through the rear arc-shaped connecting hole 26 on the right side of the rear arc-shaped fixing frame 25 and is spirally screwed and fixed from the front and rear toward the rear arc-shaped fixing frame 25 through the rear connecting seat 10 and the rear locking nut 11.
[0030] The two posterior arc-shaped connecting holes 26 on the left and right sides of the posterior arc-shaped fixing frame 25 respectively pass through the posterior nut assemblies 12. The posterior nut assembly 12 passes through and compresses the first K-wire 13 on the posterior arc-shaped fixing frame 25. The first K-wire 13 corresponds to the radius 1. The intermediate fixing frame 16 passes through the posterior arc-shaped connecting hole 26 in the middle of the posterior arc-shaped fixing frame 25 and is locked and fixed with a nut. The intermediate fixing frame 16 is provided with multiple fixing holes 161 along the anterior-posterior direction. The intermediate nut assembly 17 passes through the fixing holes 161 and compresses the third K-wire 18. The third K-wire 18 corresponds to the upper radial bone fragment.
[0031] The support nut assembly 24 is passed through the front arc connecting hole 6 on the left side of the front arc fixing frame 5, and the screw section of the support nut assembly 24 is passed through the support rod groove 23 on the left side of the support rod 22 and is locked and crimped by a nut. The front nut assembly 14 is passed through the front arc connecting hole 6 on the right side of the front arc fixing frame 5, and the front nut assembly 14 is crimped with the second Kirschner wire 15 on the front arc fixing frame 5. The second Kirschner wire 15 passes through the carpal bone 3 or metacarpal bone 4; the right side of the support rod 22 is passed through the screw or screw of the front nut assembly 14 and is locked and crimped by a nut. The support rod 22 is arranged under the metacarpal bone 4 to support the metacarpal bone.
[0032] like Figure 7 The front and rear nut assemblies, the intermediate nut assembly, and the support nut assembly of this embodiment have the same structure, comprising a screw and a nut. The inner end surface of the screw head defines a curved crimping groove 27 corresponding to the arc of the K-wire, and the outer wall of the screw shaft defines a curved insertion groove 28 corresponding to the arc of the K-wire. These curved insertion grooves 27 and 28 work together to insert and crimp the K-wire when the screw is tightened.
[0033] In this embodiment, the function of the front nut assembly to thread and tighten the second Kirschner wire is replaced by the support nut assembly. Depending on the actual hole position on the front arc-shaped fixing frame and the angle and orientation of the second Kirschner wire that needs to be fixed, the front nut assembly and the support nut assembly can be used individually or in combination and interactively to fix the second Kirschner wire.
[0034] In this embodiment, the front and rear arc-shaped fixing frames, the middle fixing frame, the pull rod, and the supporting rod are made of carbon fiber material.
[0035] Based on this embodiment, the first Kirschner wire and the third Kirschner wire can act not only on the radius 1 , but also on the ulna 2 .
[0036] Based on this embodiment, the hinged structure between the rear connecting head of the front connecting seat and the front connecting head of the pull rod can be replaced with a universal head or other connection structure. This technology is an existing technology and its main purpose is to ensure multi-directional connection requirements. It will not be described in detail in this application.
Claims
1. A wrist fracture fixation device, characterized by: The front and rear arc-shaped fixing frames are provided with a plurality of arc-shaped connecting holes along the arc direction, and the two pulling rods are respectively connected to the arc-shaped connecting holes corresponding to the front and rear directions on the two groups of front and rear arc-shaped fixing frames to pull and fix the front and rear arc-shaped fixing frames. The pulling rod comprises a front connecting seat, a front locking nut, a pulling rod, a rear connecting seat and a rear locking nut. The front shaft section of the front connecting seat is forwardly connected to the arc-shaped connecting hole of the front arc-shaped fixing frame and is spirally screwed to the front locking nut for fixation. The rear connecting head of the front connecting seat is hinged to the connecting head of the front end of the pulling rod through a pin shaft perpendicular to the front and rear directions. The rear end of the pulling rod is connected to the arc-shaped connecting hole of the rear arc-shaped fixing frame and is spirally screwed from the front and rear to the rear arc-shaped fixing frame for fixation through the rear connecting seat and the rear locking nut. Two groups of rear nut assemblies are connected to any two arc-shaped connecting holes on the fixed frame, which are respectively located on both sides of the distal end of the radius. The two ends of the first Kirschner wire that is connected to fix the radius are respectively pressed onto the front or rear end surface of the rear arc-shaped fixing frame through the nuts of the two groups of rear nut assemblies. The two groups of front nut assemblies are connected to any two arc-shaped connecting holes on both sides of the carpal bone or metacarpal bone on the front arc-shaped fixing frame. The two ends of the second Kirschner wire that is connected to fix the carpal bone or metacarpal bone are respectively pressed onto the front or rear end surface of the front arc-shaped fixing frame through the nuts of the two groups of front nut assemblies. Two groups of supporting nut assemblies are also connected to any two arc-shaped connecting holes on the front arc-shaped fixing frame, which are respectively located on both sides of the carpal bone or metacarpal bone. The two ends of the supporting rod that lifts up the carpal bone or metacarpal bone are respectively connected to the screw sections of the two groups of supporting nut assemblies and are pressed and locked by nuts.
2. The wrist fracture fixation device according to claim 1, characterized in that: An intermediate fixing frame is also connected to the arc-shaped connecting hole in the middle of the rear arc-shaped fixing frame. The rear axis section of the intermediate fixing frame is connected to the rear arc-shaped fixing frame backward and is screwed and locked with a nut on the outer side of the arc-shaped connecting hole. A plurality of fixed connecting holes are provided on the intermediate fixing frame along the front-to-back direction. The intermediate nut assembly is connected to the fixed connecting hole. The upper end of the third Kirschner wire that is connected to the radius downward is pressed onto the intermediate fixing frame through the nut of the intermediate nut assembly.
3. The wrist fracture fixation device according to claim 1, characterized in that: The front and rear nut assemblies include a screw and a nut, or a bolt and two nuts, and an arc-shaped pressing groove corresponding to the second and first Kirschner wire arcs is provided on the inner end surface of the nut, or an arc-shaped pressing groove corresponding to the second and first Kirschner wire arcs is provided on the inner end surface of the screw head.
4. The wrist fracture fixation device according to claim 2, characterized in that: The intermediate nut assembly includes a screw and a nut, or a bolt and two nuts, an arc-shaped pressing groove corresponding to the arc of the third Kirschner wire is opened on the inner end surface of the nut, or an arc-shaped pressing groove corresponding to the arc of the third Kirschner wire is opened on the inner end surface of the screw head.
5. A wrist fracture fixation device according to claim 3 or 4, characterized in that: The arc-shaped pressing groove on the inner end surface of the screw head is arranged at the connection between the head and the rod, and the outer wall of the rod is provided with an arc-shaped connecting groove corresponding to the arc of the Kirschner wire.
6. The wrist fracture fixation device according to claim 1, characterized in that: An axial supporting rod through groove is formed through one end or both ends of the supporting rod, and the screw rod section of the supporting nut assembly is passed through the supporting rod through groove and fixed by being crimped with a nut.
7. The wrist fracture fixation device according to claim 1, characterized in that: A spring section is provided at any position other than the front end of the pull rod.
8. The wrist fracture fixation device according to claim 1 or 7, characterized in that: The rear end of the pull rod is connected to one end of a spring, and the other end of the spring is connected to a nut or a bolt. The nut is screwed and locked after passing through the arc-shaped connecting hole of the rear arc-shaped fixing plate by the rear locking screw, and the bolt is screwed and locked after passing through the arc-shaped connecting hole of the rear arc-shaped fixing plate by the rear locking nut.
9. The wrist fracture fixation device according to claim 1, characterized in that: The front and rear arc-shaped fixing frames, the pull rod and the supporting rod are made of carbon fiber material.
10. The wrist fracture fixation device according to claim 2, characterized in that: The intermediate fixing frame is made of carbon fiber.