Long bone fracture fixing device
By designing a combination of hinged structure and fixation pins, the problem of simultaneously fixing the shaft and end of long bones in existing technologies has been solved, achieving a stable connection at the fracture site and reducing the risk of secondary injury and infection.
Patent Information
- Application Number
- CN202511874405.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-01-13
AI Technical Summary
Existing fixation splints are difficult to adapt to the fixation needs of both the shaft and ends of long bones, leading to an increased risk of secondary injury and infection.
A long bone fracture fixation device was designed, including a first fixation arm, a second fixation arm, a third fixation arm, and fixation pins. Through the combination of the hinge structure and the fixation pins, a stable connection between the bone shaft and the bone end is achieved, which can adapt to the shape of the bone end expansion.
It achieves flexible fixation of the bone shaft and bone ends, reduces the risk of secondary injury and infection, and improves the stability and adaptability of the fixation device.
Smart Images
Figure CN121313283A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of orthopedic medical devices, in particular to a long bone fracture fixation device. BACKGROUND
[0002] Long bone is a kind of bone shape, which is long columnar, such as femur, tibia and the like. Bone end is a human anatomy term, which specifically refers to the swollen structure at the two ends of long bone, which is located at the proximal end and the distal end of long bone, and forms a continuous whole structure with the bone shaft (middle segment of long bone).
[0003] In the scene of sudden accidents (such as car accidents, earthquakes), the incidence of long bone fracture is high, and it is necessary to complete fixation in time to avoid secondary injury, reduce the risk of infection and ensure the safety of transportation. The existing fixation splint can only provide axial support, and it is difficult to adapt to the simultaneous fixation demand of the bone shaft and the bone end. SUMMARY
[0004] The purpose of the present application is to provide a long bone fracture fixation device to solve the problems existing in the prior art, which can adapt to the simultaneous fixation demand of the bone shaft and the bone end.
[0005] To achieve the above purpose, the present application provides the following scheme: The present application provides a long bone fracture fixation device, which comprises a first fixing arm, a second fixing arm, a third fixing arm, a plurality of first fixing nails and a plurality of second fixing nails; the first fixing arm is used to be placed at the bone shaft, the first end of the first fixing nail is used to be fixedly inserted into the bone shaft, and the second end of the first fixing nail is fixedly connected with the first fixing arm; the second fixing arm is used to be placed at the bone end, the middle part of the second fixing arm is raised relative to the two ends of the second fixing arm, the first end of the second fixing nail is used to be fixedly inserted into the bone end, and the second end of the second fixing nail is fixedly connected with the middle part of the second fixing arm or one end of the second fixing arm; the first end of the third fixing arm is hinged with the first end of the first fixing arm, so that the second end of the third fixing arm can be deflected relative to the first fixing arm in the direction away from the long bone, the first end of the third fixing arm and the first end of the first fixing arm can be locked, and the second end of the third fixing arm is fixedly connected with the middle part of the second fixing arm.
[0006] Preferably, all the first fixing nails are arranged on a first plane, and all the second fixing nails are symmetrically arranged about the first plane.
[0007] Preferably, the second fixing arm is arc-shaped, and the second fixing nail extends in the radial direction of the second fixing arm.
[0008] Preferably, the second fixing arm and the third fixing arm are integrally formed.
[0009] Preferably, a connecting screw rod is further included, which passes through the first end of the third fixed arm and the first end of the first fixed arm, the first end of the third fixed arm being rotatable around the connecting screw rod, and two hand nuts are respectively arranged on both sides of the first end of the third fixed arm, the two hand nuts being in threaded connection with the connecting screw rod.
[0010] Preferably, the first end of the third fixed arm is provided with an arc-shaped recess, the first end of the first fixed arm is provided with an arc-shaped protrusion, the arc-shaped protrusion is capable of extending into the arc-shaped recess, and the connecting screw rod passes through the arc-shaped recess and the arc-shaped protrusion.
[0011] Preferably, a plurality of third fixed nails are further included, the first end of each of the third fixed nails being used for being fixedly inserted into a bone shaft or a bone end, and the second end of each of the third fixed nails being fixedly connected with the third fixed arm.
[0012] Preferably, the bottom surface of the first fixing arm has a plurality of first protrusions, the number of the first protrusions is equal to the number of the first fixing nails, the first protrusions correspond to the first fixing nails one by one, the bottom end surface of the first protrusion is used for contacting the skin, a first through hole is formed in the bottom end surface of the first protrusion, the upper section of the first through hole is a first connecting section, the lower section of the first through hole is a first guide section, the first guide section is arranged between the first connecting section and the bottom end surface of the first protrusion, the first end of the first fixing nail is used for penetrating through the first connecting section and the first guide section and is inserted into the bone stem, and the second end of the first fixing nail is threadedly connected with the first connecting section; the bottom surface of the second fixing arm has a plurality of second protrusions, the number of the second protrusions is equal to the number of the second fixing nails, the second protrusions correspond to the second fixing nails one by one, the bottom end surface of the second protrusion is used for contacting the skin, a second through hole is formed in the bottom end surface of the second protrusion, the upper section of the second through hole is a second connecting section, the lower section of the second through hole is a second guide section, the second guide section is arranged between the second connecting section and the bottom end surface of the second protrusion, the first end of the second fixing nail is used for penetrating through the second connecting section and the second guide section and is inserted into the bone end, and the second end of the second fixing nail is threadedly connected with the second connecting section; the bottom surface of the third fixing arm has a plurality of third protrusions, the number of the third protrusions is equal to the number of the third fixing nails, the third protrusions correspond to the third fixing nails one by one, the bottom end surface of the third protrusion is used for contacting the skin, a third through hole is formed in the bottom end surface of the third protrusion, the upper section of the third through hole is a third connecting section, the lower section of the third through hole is a third guide section, the third guide section is arranged between the third connecting section and the bottom end surface of the third protrusion, the first end of the third fixing nail is used for penetrating through the third connecting section and the third guide section and is inserted into the bone stem or the bone end, and the second end of the third fixing nail is threadedly connected with the third connecting section.
[0013] Preferably, the first end of the first fixed nail has a first triangular pyramid portion which gradually shrinks inward in the direction away from the second end of the first fixed nail, the portion between the second end of the first fixed nail and the first triangular pyramid portion on the first fixed nail is a first light pole section; the first end of the second fixed nail has a second triangular pyramid portion which gradually shrinks inward in the direction away from the second end of the second fixed nail, the portion between the second end of the second fixed nail and the second triangular pyramid portion on the second fixed nail is a second light pole section; the first end of the third fixed nail has a third triangular pyramid portion which gradually shrinks inward in the direction away from the second end of the third fixed nail, the portion between the second end of the third fixed nail and the third triangular pyramid portion on the third fixed nail is a third light pole section; the bottom end face of the first convex column is provided with a first air permeation groove, the bottom end face of the second convex column is provided with a second air permeation groove, and the bottom end face of the third convex column is provided with a third air permeation groove.
[0014] Preferably, among all the first fixed nails, the first fixed nails arranged at both ends are arranged obliquely relative to the first fixed arm, the first fixed nail arranged between the two ends is arranged vertically relative to the first fixed arm, and all the first fixed nails are arranged symmetrically about the second plane.
[0015] The present application has the following technical effects relative to the prior art: The long bone fracture fixing device provided by the present application integrally fixes and connects the first fixed arm and the diaphysis through the first fixed nail, integrally fixes and connects the second fixed arm and the bone end through the second fixed nail, and integrally fixes and connects the first fixed arm and the second fixed arm through the third fixed arm, so as to integrally fix and connect the diaphysis and the bone end, and the first end of the third fixed arm is hinged with the first end of the first fixed arm, so that the second end of the third fixed arm can be deflected relative to the first fixed arm in the direction away from the long bone, the first end of the third fixed arm and the first end of the first fixed arm can be locked, the angle of the third fixed arm and the second fixed arm relative to the first fixed arm is flexibly adjusted, the middle part of the second fixed arm is raised relative to the two ends of the second fixed arm, the second fixed arm can be conveniently adapted to the shape of the bone end swelling relative to the diaphysis, and the second fixed nail stably connects the second fixed arm and the bone end. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0017] Fig. 1 This is a schematic diagram of the installation of the long bone fracture fixation device provided by the present invention. Fig. 2 A top view schematic diagram of the long bone fracture fixation device provided by the present invention; Fig. 3 A schematic diagram of the second fixation arm in the long bone fracture fixation device provided by the present invention; In the diagram: 1-First fixing arm, 2-Second fixing arm, 3-Third fixing arm, 4-First fixing pin, 5-Second fixing pin, 6-Bone shaft, 7-Bone end, 8-Connecting screw, 9-Hand-tightening nut, 10-Arc-shaped groove, 11-Arc-shaped protrusion, 12-Third fixing pin, 13-First protrusion, 14-Second protrusion, 15-Third protrusion. Detailed Implementation
[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described 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.
[0019] The purpose of this invention is to provide a long bone fracture fixation device to solve the problems existing in the prior art and to meet the need for simultaneous fixation of the bone shaft and bone ends.
[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0021] like Figs. 1 to 3 As shown, the present invention provides a long bone fracture fixation device, including a first fixation arm 1, a second fixation arm 2, a third fixation arm 3, a plurality of first fixation nails 4 and a plurality of second fixation nails 5; the first fixation arm 1 is used to be placed at the bone shaft 6, the first end of the first fixation nail 4 is used to be fixedly inserted into the bone shaft 6, and the second end of the first fixation nail 4 is fixedly connected to the first fixation arm 1; the second fixation arm 2 is used to be placed at the bone end 7, the middle part of the second fixation arm 2 is raised relative to the two ends of the second fixation arm 2, the first end of the second fixation nail 5 is used to be fixedly inserted into the bone end 7, and the second end of the second fixation nail 5 is fixedly connected to the middle part of the second fixation arm 2 or one end of the second fixation arm 2; the first end of the third fixation arm 3 is hinged to the first end of the first fixation arm 1 so that the second end of the third fixation arm 3 can be deflected relative to the first fixation arm 1 in a direction away from the long bone, the first end of the third fixation arm 3 and the first end of the first fixation arm 1 can be locked, and the second end of the third fixation arm 3 is fixedly connected to the middle part of the second fixation arm 2.
[0022] The long bone fracture fixing device provided by the application is characterized in that the first fixing arm 1 is fixedly connected with the bone shaft 6 by the first fixing nail 4, the second fixing arm 2 is fixedly connected with the bone end 7 by the second fixing nail 5, and the first fixing arm 1 is fixedly connected with the second fixing arm 2 by the third fixing arm 3, so that the bone shaft 6 and the bone end 7 are fixedly connected as a whole.
[0023] As a more preferred embodiment of the application, all the first fixing nails 4 are arranged on the first plane, and all the second fixing nails 5 are symmetrically arranged with respect to the first plane, so that the stability of the connection between the second fixing arm 2 and the bone end 7 can be effectively improved.
[0024] As a more preferred embodiment of the application, the second fixing arm 2 is arc-shaped, and the second fixing nail 5 extends in the radial direction of the second fixing arm 2, so that the manufacturing and installation are facilitated.
[0025] As a more preferred embodiment of the application, the second fixing arm 2 is integrally formed with the third fixing arm 3, so that the manufacturing and installation are facilitated.
[0026] As a more preferred embodiment of the application, the long bone fracture fixing device further comprises a connecting screw 8 and two hand nuts 9. The connecting screw 8 passes through the first end of the third fixing arm 3 and the first end of the first fixing arm 1, and the first end of the third fixing arm 3 can rotate around the connecting screw 8. The two hand nuts 9 are respectively arranged on the two sides of the first end of the third fixing arm 3, and are both in threaded connection with the connecting screw 8, so that the first end of the third fixing arm 3 and the first end of the first fixing arm 1 can be unlocked or locked, and the operation is facilitated and can be completed manually without the aid of other auxiliary tools.
[0027] As a more preferred embodiment of the application, the first end of the third fixing arm 3 is provided with an arc-shaped recess 10, and the first end of the first fixing arm 1 is provided with an arc-shaped protrusion 11. The arc-shaped protrusion 11 can extend into the arc-shaped recess 10, and the connecting screw 8 passes through the arc-shaped recess 10 and the arc-shaped protrusion 11, so that the stability of the rotation of the first end of the third fixing arm 3 around the first end of the first fixing arm 1 is improved.
[0028] As a more preferred embodiment of the present application, the long bone fracture fixation device further comprises a plurality of third fixation nails 12, the first end of the third fixation nail 12 is used for fixing insertion into the diaphysis 6 or the epiphysis 7, and the second end of the third fixation nail 12 is fixedly connected with the third fixation arm 3, which can effectively improve the stability of the installation of the third fixation arm 3.
[0029] As a more preferred embodiment of the present application, the bottom surface of the first fixation arm 1 has a plurality of first protruding columns 13, the number of the first protruding columns 13 is equal to the number of the first fixation nails 4, the first protruding column 13 corresponds to the first fixation nail 4 one by one, the bottom end surface of the first protruding column 13 is used for contacting the skin, a first through hole is formed in the bottom end surface of the first protruding column 13, the upper section of the first through hole is a first connecting section, the lower section of the first through hole is a first guide section, the first guide section is arranged between the first connecting section and the bottom end surface of the first protruding column 13, the first end of the first fixation nail 4 is used for penetrating through the first connecting section and the first guide section and inserting into the diaphysis 6, and the second end of the first fixation nail 4 is threadedly connected with the first connecting section; the bottom surface of the second fixation arm 2 has a plurality of second protruding columns 14, the number of the second protruding columns 14 is equal to the number of the second fixation nails 5, the second protruding column 14 corresponds to the second fixation nail 5 one by one, the bottom end surface of the second protruding column 14 is used for contacting the skin, a second through hole is formed in the bottom end surface of the second protruding column 14, the upper section of the second through hole is a second connecting section, the lower section of the second through hole is a second guide section, the second guide section is arranged between the second connecting section and the bottom end surface of the second protruding column 14, the first end of the second fixation nail 5 is used for penetrating through the second connecting section and the second guide section and inserting into the epiphysis 7, and the second end of the second fixation nail 5 is threadedly connected with the second connecting section; the bottom surface of the third fixation arm 3 has a plurality of third protruding columns 15, the number of the third protruding columns 15 is equal to the number of the third fixation nails 12, the third protruding column 15 corresponds to the third fixation nail 12 one by one, the bottom end surface of the third protruding column 15 is used for contacting the skin, a third through hole is formed in the bottom end surface of the third protruding column 15, the upper section of the third through hole is a third connecting section, the lower section of the third through hole is a third guide section, the third guide section is arranged between the third connecting section and the bottom end surface of the third protruding column 15, the first end of the third fixation nail 12 is used for penetrating through the third connecting section and the third guide section and inserting into the diaphysis 6 or the epiphysis 7, and the second end of the third fixation nail 12 is threadedly connected with the third connecting section, which is convenient for manufacturing and installation.
[0030] As a more preferred embodiment of the present application, the first end of the first fixing nail 4 has a first triangular pyramid portion which gradually shrinks inward in the direction away from the second end of the first fixing nail 4, and the portion on the first fixing nail 4 between the first end of the first fixing nail 4 and the first triangular pyramid portion is a first light pole section; the first end of the second fixing nail 5 has a second triangular pyramid portion which gradually shrinks inward in the direction away from the second end of the second fixing nail 5, and the portion on the second fixing nail 5 between the first end of the second fixing nail 5 and the second triangular pyramid portion is a second light pole section; the first end of the third fixing nail 12 has a third triangular pyramid portion which gradually shrinks inward in the direction away from the second end of the third fixing nail 12, and the portion on the third fixing nail 12 between the first end of the third fixing nail 12 and the third triangular pyramid portion is a third light pole section, which can reduce the "wringing" phenomenon of the first fixing nail 4, the second fixing nail 5 and the third fixing nail 12 during the process of being screwed into the skin tissue, and reduce the damage to the skin tissue; the bottom end face of the first protruding column 13 is provided with a first air-permeable groove, the bottom end face of the second protruding column 14 is provided with a second air-permeable groove, and the bottom end face of the third protruding column 15 is provided with a third air-permeable groove, which can ventilate and permeate air at the wound caused by the first fixing nail 4, the second fixing nail 5 or the third fixing nail 12 penetrating the surface of the skin, and can perform dressing change and other operations at the wound, thereby reducing the postoperative infection.
[0031] As a more preferred embodiment of the present application, among all the first fixing nails 4, the first fixing nails 4 arranged at both ends are arranged obliquely relative to the first fixing arm 1, and the first fixing nails 4 arranged between the two ends are arranged vertically relative to the first fixing arm 1, and all the first fixing nails 4 are arranged symmetrically about the second plane, which can improve the anti-pulling ability and improve the installation stability.
[0032] The principles and embodiments of the present application are described by using specific examples, and the above examples are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific embodiments and application scope will be changed. In conclusion, the content of the present description should not be understood as a limitation of the present application.
Claims
1. A long bone fracture fixation device, characterized in that: It includes a first fixation arm, a second fixation arm, a third fixation arm, a plurality of first fixation pins, and a plurality of second fixation pins; the first fixation arm is used to be placed at the bone shaft, the first end of the first fixation pin is used to be fixedly inserted into the bone shaft, and the second end of the first fixation pin is fixedly connected to the first fixation arm; the second fixation arm is used to be placed at the bone end, the middle part of the second fixation arm is raised relative to the two ends of the second fixation arm, the first end of the second fixation pin is used to be fixedly inserted into the bone end, and the second end of the second fixation pin is fixedly connected to the middle part of the second fixation arm or one end of the second fixation arm; the first end of the third fixation arm is hinged to the first end of the first fixation arm so that the second end of the third fixation arm can be deflected relative to the first fixation arm in a direction away from the long bone, the first end of the third fixation arm can be locked to the first end of the first fixation arm, and the second end of the third fixation arm is fixedly connected to the middle part of the second fixation arm.
2. The long bone fracture fixation device according to claim 1, characterized in that: All the first fixing pins are arranged on the first plane, and all the second fixing pins are arranged symmetrically about the first plane.
3. The long bone fracture fixation device according to claim 1, characterized in that: The second fixing arm is arc-shaped, and the second fixing pin extends radially on the second fixing arm.
4. The long bone fracture fixation device according to claim 1, characterized in that: The second fixed arm and the third fixed arm are integrally formed.
5. The long bone fracture fixation device according to claim 1, characterized in that: It also includes a connecting screw and two hand-tightening nuts. The connecting screw passes through the first end of the third fixed arm and the first end of the first fixed arm. The first end of the third fixed arm can rotate around the connecting screw. The two hand-tightening nuts are respectively placed on both sides of the first end of the third fixed arm. Both hand-tightening nuts are threadedly connected to the connecting screw.
6. The long bone fracture fixation device according to claim 5, characterized in that: The first end of the third fixing arm has an arc-shaped groove, and the first end of the first fixing arm has an arc-shaped protrusion. The arc-shaped protrusion can extend into the arc-shaped groove, and the connecting screw passes through the arc-shaped groove and the arc-shaped protrusion.
7. The long bone fracture fixation device according to claim 1, characterized in that: It also includes several third fixation pins, the first end of which is used to fix the insertion into the bone shaft or bone end, and the second end of which is fixedly connected to the third fixation arm.
8. The long bone fracture fixation device according to claim 7, characterized in that: The bottom surface of the first fixation arm has a plurality of first protrusions, the number of which is equal to the number of first fixation pins. Each first protrusion corresponds to one first fixation pin. The bottom end face of each first protrusion is for contact with the skin. A first through hole is formed on the bottom end face of each first protrusion. The upper section of the first through hole is a first connecting section, and the lower section is a first guide section. The guide section is positioned between the first connecting section and the bottom end face of the first protrusion. The first end of each first fixation pin passes through the first connecting section and the first guide section and is inserted into the bone shaft. The second end of each first fixation pin is threadedly connected to the first connecting section. The bottom surface of the second fixation arm has a plurality of second protrusions, the number of which is equal to the number of second fixation pins. Each second protrusion corresponds to one second fixation pin. The bottom end face of each second protrusion is for contact with the skin. A second through hole is formed on the bottom end face of each second protrusion. The upper section of the second through hole is a second... The connecting segment has a second guide segment at the lower end of the second through hole, which is located between the second connecting segment and the bottom end face of the second protrusion. The first end of the second fixing pin is used to pass through the second connecting segment and the second guide segment and insert into the bone end. The second end of the second fixing pin is threadedly connected to the second connecting segment. The bottom surface of the third fixing arm has a plurality of third protrusions, the number of which is equal to the number of third fixing pins. Each third protrusion corresponds to a third fixing pin. The bottom end face of the third protrusion is used to contact the skin. A third through hole is provided on the bottom end face of the third protrusion. The upper section of the third through hole is the third connecting segment, and the lower section is the third guide segment. The third guide segment is located between the third connecting segment and the bottom end face of the third protrusion. The first end of the third fixing pin is used to pass through the third connecting segment and the third guide segment and insert into the bone shaft or bone end. The second end of the third fixing pin is threadedly connected to the third connecting segment.
9. The long bone fracture fixation device according to claim 8, characterized in that: The first end of the first fixing nail has a first triangular pyramid portion, which gradually tapers inward in a direction away from the second end of the first fixing nail. The portion between the second end of the first fixing nail and the first triangular pyramid portion is a first smooth rod segment. The first end of the second fixing nail has a second triangular pyramid portion, which gradually tapers inward in the direction away from the second end of the second fixing nail. The portion between the second end of the second fixing nail and the second triangular pyramid portion is a second smooth rod segment. The first end of the third fixing nail has a third triangular pyramid portion, which gradually tapers inward in the direction away from the second end of the third fixing nail. The portion between the second end of the third fixing nail and the third triangular pyramid portion is a third smooth rod segment. A first vent groove is formed on the bottom end face of the first protrusion, a second vent groove is formed on the bottom end face of the second protrusion, and a third vent groove is formed on the bottom end face of the third protrusion.
10. The long bone fracture fixation device according to claim 1, characterized in that: Of all the first fixing pins, the first fixing pins arranged at both ends are inclined relative to the first fixing arm, the first fixing pins arranged between the two ends are perpendicular to the first fixing arm, and all the first fixing pins are symmetrically arranged about the second plane.