Self-locking intramedullary nail for animal fracture

Abstract

The utility model relates to the technical field of animal fracture intramedullary nails, in particular to a self-locking animal fracture intramedullary nail which comprises an intramedullary nail outer tube, the diameter of the outer surface of one end of the intramedullary nail outer tube is larger than that of the other end of the intramedullary nail outer tube, and the outer surface of a self-locking nail button penetrates through the outer surface of the intramedullary nail outer tube. According to the self-locking intramedullary nail for animal fracture, after the intramedullary nail outer tube is inserted into a marrow cavity, compressed gelatin can be injected into one end of the interior of the intramedullary nail outer tube through a one-way valve, so that the compressed gelatin can expand and push a flexible filling layer, and the flexible filling layer can push a self-locking nail buckle to move; the self-locking nail button can extend out of the intramedullary nail outer tube, the self-locking nail button can be clamped into a marrow cavity, the intramedullary nail outer tube can be pushed forwards but cannot be pulled out outwards, and when the intramedullary nail outer tube is located at the thin end of a bone, the intramedullary nail outer tube can be conveniently fixed without a screw.

Description

TECHNICAL FIELD

[0001] The utility model relates to animal fracture intramedullary nail technical field, specifically is a kind of intramedullary nail for the animal fracture of self-locking. BACKGROUND

[0002] When animal fracture, the fracture of animal needs to be fixed and connected, so that the fracture of animal can be fixed, to help bone healing, and intramedullary nail is an internal fixation device, by inserting into bone marrow cavity to provide stable support, and compared with external fixator intramedullary nail can reduce the damage to surrounding tissue, provide better effect for the reduction and fixation of fracture, but when connecting and fixing small animal fracture, due to the small bone and bone marrow cavity of small animal, when intramedullary nail is fixed in bone marrow cavity, it is not easy to punch and fix the end of thin bone, and it is inconvenient to use and fix. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of intramedullary nails for the animal fracture of self-locking, to solve the problem that the end of thin bone of animal skeleton is not easy to punch and fix intramedullary nail in above-mentioned background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of intramedullary nails for the animal fracture of self-locking, including intramedullary nail outer tube, the diameter of the outer surface of one end of the intramedullary nail outer tube is greater than the diameter of the other end, and the outer surface of one side of the intramedullary nail outer tube is provided with insertion through-hole, and the outer surface of insertion through-hole is provided with a vertical and inclined plane, characterized by: the inside of one end of the intramedullary nail outer tube is fixedly installed with inlay ring, the outer surface of the intramedullary nail outer tube is uniformly provided with self-locking nail buckle, and the outer surface of self-locking nail buckle is inclined design, the intramedullary nail outer tube and self-locking nail buckle are sliding friction connection, and the outer surface of self-locking nail buckle is in contact with the outer surface of bone marrow cavity, sliding flexible mechanism is arranged between self-locking nail buckle and intramedullary nail outer tube, the intramedullary nail outer tube can be self-locked and fixed in the inside of bone marrow cavity by sliding flexible mechanism, improve the convenience when installing and using.

[0005] Preferably, sliding flexible mechanism is arranged between the inlay ring and the intramedullary nail outer tube, and the sliding flexible mechanism comprises: a flexible filling layer fixed between the inlay rings, and the inlay rings and the flexible filling layer are concentrically designed, the intramedullary nail outer tube is fixedly installed with a partition plate at one end close to the inclined top head, and the outer surface of the partition plate is fitted with the outer surface of the inlay ring, and the outer surface of the partition plate is fixedly installed with a one-way valve, and the one-way valve and the intramedullary nail outer tube are concentrically designed.

[0006] The above technical scheme is adopted, and after the intramedullary nail outer tube is inserted into the inside of the bone marrow cavity, the compressed gel can be injected into the inside of the intramedullary nail outer tube through the one-way valve, the flexible filling layer can be pushed out and expanded by the compressed gel, the self-locking nail buckle is pushed out by the expansion of the flexible filling layer, the self-locking nail buckle can be pushed out from the intramedullary nail outer tube, the self-locking nail buckle can be in close contact with the bone marrow cavity without being fixed by a screw, and the intramedullary nail outer tube cannot be pulled out from the bone marrow cavity, so that the intramedullary nail outer tube can be fixed in the inside of the bone marrow cavity.

[0007] Preferably, the outer surface of the end of the intramedullary nail outer tube close to the insertion hole is provided with a normal threaded hole, and the normal threaded hole is matched with the insertion hole; the outer surface of the end of the intramedullary nail outer tube close to the insertion hole is provided with an inclined threaded hole, and the inclined threaded hole is aligned with the insertion hole.

[0008] The above technical scheme is adopted, and the screw can be screwed into the inside of the normal threaded hole or the inclined threaded hole through the insertion hole at one end of the thicker bone, so that different shapes of bones can be fixed.

[0009] Preferably, the end of the intramedullary nail outer tube away from the insertion hole is fixedly provided with an inclined top head, and the inclined top head is concentrically designed with the intramedullary nail outer tube.

[0010] The above technical scheme is adopted, and the intramedullary nail outer tube can be conveniently inserted into the bone marrow cavity through the inclined top head, thereby guiding the intramedullary nail outer tube.

[0011] Preferably, a flow equalizing mechanism is arranged between the intramedullary nail outer tube and the isolation plate, the compressed gel injected into the inside of the intramedullary nail outer tube can be uniformly dispersed by the flow equalizing mechanism, the compressed gel can be uniformly contacted with the flexible filling layer, and the self-locking nail buckle can be uniformly pushed out.

[0012] The above technical scheme is adopted, the injected high-pressure gelatin can be uniformly dispersed, and the self-locking nail buckle can be uniformly pushed out, thereby reducing the phenomenon that the self-locking nail buckle cannot be pushed out due to uneven stress.

[0013] Preferably, the flow equalizing mechanism comprises: an intramedullary nail inner tube fixedly installed in the inside of the intramedullary nail outer tube, the intramedullary nail inner tube is located between the intramedullary nail outer tube and the isolation plate, the isolation plate and the intramedullary nail inner tube are concentrically designed, the outer surface of the intramedullary nail inner tube is uniformly provided with dispersion holes, and the intramedullary nail inner tube is located in the inside of the flexible filling layer.

[0014] The above technical scheme is adopted, the flexible filling layer can be blocked and limited by the intramedullary nail inner tube, the self-locking nail buckle cannot be pushed into the inside of the intramedullary nail outer tube, and the compressed gel can be uniformly discharged through the dispersion holes uniformly arranged on the outer surface of the intramedullary nail inner tube.

[0015] Preferably, the outer surface of the one-way valve is provided with a threaded screw-in port, and the threaded screw-in port is concentric with the one-way valve, and the threaded screw-in port in the one-way valve is threadedly connected with the pipeline for injecting the compressed gelatin.

[0016] By using the above technical scheme, the pipeline for injecting the compressed gelatin can be connected with the one-way valve through the threaded screw-in port, so that the compressed gelatin can be injected without manual pushing, and the probability of leakage of the compressed gelatin during injection is reduced, and the injection of the compressed gelatin is more convenient.

[0017] Compared with the prior art, the self-locking intramedullary nail for animal fracture has the advantages that:

[0018] 1. After the outer tube of the intramedullary nail is inserted into the inside of the bone marrow cavity, the compressed gelatin can be injected into one end of the inside of the outer tube of the intramedullary nail through the one-way valve, so that the compressed gelatin can expand and push the flexible filling layer, the flexible filling layer can push the self-locking nail buckle to move, the self-locking nail buckle can be stretched out of the outer tube of the intramedullary nail, the self-locking nail buckle can be clamped into the inside of the bone marrow cavity, and the outer tube of the intramedullary nail can be pushed forward but cannot be pulled out, so that the outer tube of the intramedullary nail can be conveniently fixed without using a screw when the bone is thin at one end;

[0019] 2. When the compressed gelatin is injected into the outer tube of the intramedullary nail on one side of the isolation plate, the compressed gelatin will first fill the inside of the inner tube of the intramedullary nail, and will be uniformly sprayed outside through the dispersion holes on the outer surface of the inner tube of the intramedullary nail, so that the compressed gelatin can be uniformly sprayed to the flexible filling layer, the flexible filling layer can uniformly expand and push out the self-locking nail buckle, and the self-locking nail buckle can be uniformly pushed out, thereby reducing the probability that the self-locking nail buckle cannot be pushed out and fixed with the bone marrow cavity due to uneven stress;

[0020] 3. When the compressed gelatin is injected, only the pipeline for injecting the compressed gelatin needs to be screwed into the inside of the threaded screw-in port, so that the pipeline and the one-way valve will not be separated due to the pressure of the injected compressed gelatin, the compressed gelatin can be injected into the inside of the outer tube of the intramedullary nail, the injected compressed gelatin will not be leaked due to the injection pressure, and the portability of the injected compressed gelatin is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a three-dimensional structure schematic diagram of the outer tube of the intramedullary nail and the inclined top head of the utility model;

[0022] Figure 2 It is a three-dimensional structure schematic diagram of the outer tube of the intramedullary nail and the inclined top head of the utility model;

[0023] Figure 3 It is a three-dimensional structure schematic diagram of the flexible filling layer and the inlaid ring of the utility model;

[0024] Figure 4 It is the explosion three-dimensional structure schematic view of the isolation plate and the intramedullary nail inner tube of the utility model;

[0025] Figure 5 It is the section three-dimensional structure schematic view of the inlay ring and the self-locking nail buckle of the utility model.

[0026] Figure 6 It is the section three-dimensional structure schematic view of the inlay ring and the self-locking nail buckle of the utility model.

[0027] In the drawing: 1, intramedullary nail outer tube;2, straight thread hole;3, inclined thread hole;4, insertion through hole;5, isolation plate;6, intramedullary nail inner tube;7, dispersion hole;8, inclined top head;9, one-way valve;10, threaded screw-in entrance;11, flexible filling layer;12, inlay ring;13, self-locking nail buckle. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0029] Please refer to Figures 1-6 The utility model provides a kind of technical scheme: a self-locking intramedullary nail for animal fracture, including intramedullary nail outer tube 1, the diameter of the outer surface of one end of intramedullary nail outer tube 1 is greater than the diameter of the other end, and the outer surface of one side of intramedullary nail outer tube 1 is provided with insertion through hole 4, and the outer surface of insertion through hole 4 is provided with a straight and inclined plane, characterized in that: the inner portion of one end of intramedullary nail outer tube 1 is fixedly installed with inlay ring 12, the outer surface of intramedullary nail outer tube 1 is uniformly provided with self-locking nail buckle 13, and the outer surface of self-locking nail buckle 13 is inclined design, intramedullary nail outer tube 1 and self-locking nail buckle 13 are sliding friction connection, and the outer surface of self-locking nail buckle 13 is in contact with the outer surface of bone marrow cavity, sliding flexible mechanism is arranged between self-locking nail buckle 13 and intramedullary nail outer tube 1, so that intramedullary nail outer tube 1 can be self-locked and fixed in the inner portion of bone marrow cavity, improve the convenience when installing and using.

[0030] The different diameters of the two ends of intramedullary nail outer tube 1 can facilitate the insertion of intramedullary nail outer tube 1 into the inner portion of bone marrow cavity.

[0031] The sliding flexible mechanism comprises a flexible filling layer 11 fixed between inlaid rings 12, the inlaid rings 12 are concentric with the flexible filling layer 11, an isolation plate 5 is fixedly installed on one end of the intramedullary nail outer tube 1 close to the inclined top head 8, the outer surface of the isolation plate 5 is attached to the outer surface of the inlaid ring 12, a one-way valve 9 is fixedly installed on the outer surface of the isolation plate 5, and the one-way valve 9 is concentric with the intramedullary nail outer tube 1.

[0032] The one-way valve 9 prevents the compressed gelatin injected into the intramedullary nail outer tube 1 from leaking outwards, so that the injected compressed gelatin can expand and push open the flexible filling layer 11, allowing the flexible filling layer 11 to expand and be blocked by the isolation plate 5, and the inlaid ring 12 can fix the position of the flexible filling layer 11, allowing the self-locking nail buckle 13 to be pushed out of the intramedullary nail outer tube 1, so that the self-locking nail buckle 13 can tightly attach to the inner wall of the bone marrow cavity, allowing the intramedullary nail outer tube 1 to be inserted into the bone marrow cavity and not to be pulled out, so that the intramedullary nail outer tube 1 can be fixed in the bone marrow cavity without using screws, facilitating the fixation of the intramedullary nail outer tube 1.

[0033] A normal screw hole 2 is formed on the outer surface of one end of the intramedullary nail outer tube 1 close to the insertion hole 4, and the normal screw hole 2 is attached to the insertion hole 4, and an inclined screw hole 3 is formed on the outer surface of one end of the intramedullary nail outer tube 1 close to the insertion hole 4, and the inclined screw hole 3 is aligned with the insertion hole 4.

[0034] The insertion hole 4 allows the screw to pass through the hole in the bone and be screwed into the inclined screw hole 3 or the normal screw hole 2, facilitating the drilling and screwing according to the bone.

[0035] An inclined top head 8 is fixedly installed on one end of the intramedullary nail outer tube 1 away from the insertion hole 4, and the inclined top head 8 is concentric with the intramedullary nail outer tube 1.

[0036] The inclined top head 8 makes it easier for the intramedullary nail outer tube 1 to be inserted into the bone marrow cavity, reducing the difficulty of inserting the intramedullary nail outer tube 1 into the bone marrow cavity.

[0037] A flow equalizing mechanism is arranged between the intramedullary nail outer tube 1 and the isolation plate 5, which allows the compressed gelatin injected into the intramedullary nail outer tube 1 to be evenly dispersed, allowing the compressed gelatin to be in contact with the flexible filling layer 11, and allowing the self-locking nail buckle 13 to be evenly pushed out, the flow equalizing mechanism comprises an intramedullary nail inner tube 6 fixedly installed in the intramedullary nail outer tube 1, the intramedullary nail inner tube 6 is located between the intramedullary nail outer tube 1 and the isolation plate 5, the isolation plate 5 is concentric with the intramedullary nail inner tube 6, and the outer surface of the intramedullary nail inner tube 6 is uniformly provided with dispersion holes 7, and the intramedullary nail inner tube 6 is located in the flexible filling layer 11.

[0038] When injecting high-pressure gel into the inside of the intramedullary nail outer tube 1 through the one-way valve 9, the high-pressure gel will first enter the inside of the intramedullary nail inner tube 6 and evenly fill the flexible filling layer 11 through the dispersion holes 7 on the outer surface of the intramedullary nail inner tube 6, so that the high-pressure gel can uniformly contact the flexible filling layer 11, the flexible filling layer 11 can uniformly expand outward, and the self-locking nail buckle 13 can be uniformly ejected, reducing the phenomenon that the self-locking nail buckle 13 is unevenly stressed and causes the intramedullary nail outer tube 1 to be not firmly fixed with the bone marrow cavity.

[0039] The outer surface of the one-way valve 9 is provided with a threaded screw-in port 10, and the threaded screw-in port 10 is concentrically designed with the one-way valve 9, and the threaded screw-in port 10 in the one-way valve 9 is screw-connected with the pipeline for injecting the compressed gelatin.

[0040] When high-pressure gelatin needs to be injected, the pipeline for injecting the high-pressure gelatin only needs to be screwed into the inside of the threaded screw-in port 10, so that the threaded screw-in port 10 will not be separated from the pipeline due to the injection pressure when the compressed gelatin is injected, reducing the leakage probability when the compressed gelatin is injected, and making it more convenient and easy to inject the compressed gelatin into the intramedullary nail outer tube 1.

[0041] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A self-locking intramedullary nail for animal bone fracture, comprising an intramedullary nail outer tube (1), the diameter of one end of the outer surface of the intramedullary nail outer tube (1) is greater than the diameter of the other end, and an insertion through hole (4) is arranged on one side of the outer surface of the intramedullary nail outer tube (1), and the outer surface of the insertion through hole (4) is provided with a vertical and inclined plane, characterized in that: The inner end of the intramedullary nail outer tube (1) is fixedly installed with an inlay ring (12), the outer surface of the intramedullary nail outer tube (1) is uniformly provided with a self-locking nail buckle (13), and the outer surface of the self-locking nail buckle (13) is designed to be inclined, the intramedullary nail outer tube (1) and the self-locking nail buckle (13) are in sliding friction connection, and the outer surface of the self-locking nail buckle (13) is in contact with the outer surface of the bone marrow cavity, and a sliding flexible mechanism is arranged between the self-locking nail buckle (13) and the intramedullary nail outer tube (1), so that the intramedullary nail outer tube (1) can be self-locked and fixed in the inner part of the bone marrow cavity, and the convenience during installation and use is improved. ​ 2. The self-locking intramedullary nail for animal fracture according to claim 1, characterized in that: The sliding flexible mechanism comprises: a flexible filling layer (11), the flexible filling layer (11) is fixed between the inlay rings (12), and the inlay rings (12) and the flexible filling layer (11) are designed to be concentric, the intramedullary nail outer tube (1) is fixedly installed with an isolation plate (5) at one end close to the inclined top head (8), and the outer surface of the isolation plate (5) is in close contact with the outer surface of the inlay ring (12), and the outer surface of the isolation plate (5) is fixedly installed with a one-way valve (9), and the one-way valve (9) and the intramedullary nail outer tube (1) are designed to be concentric.

3. The self-locking intramedullary nail for animal fracture according to claim 1, characterized in that: The outer surface of the end of the intramedullary nail outer tube (1) close to the insertion through hole (4) is provided with a normal screw hole (2), and the normal screw hole (2) is in close contact with the insertion through hole (4), the outer surface of the end of the intramedullary nail outer tube (1) close to the insertion through hole (4) is provided with an inclined screw hole (3), and the inclined screw hole (3) is in alignment with the insertion through hole (4).

4. The self-locking intramedullary nail for animal fracture of claim 1, wherein: The end of the intramedullary nail outer tube (1) away from the insertion through hole (4) is fixedly installed with an inclined top head (8), and the inclined top head (8) and the intramedullary nail outer tube (1) are designed to be concentric.

5. The self-locking intramedullary nail for animal fracture of claim 1, wherein: A flow equalizing mechanism is arranged between the intramedullary nail outer tube (1) and the isolation plate (5), so that the compressed gelatin injected into the intramedullary nail outer tube (1) can be uniformly dispersed, the compressed gelatin can be uniformly contacted with the flexible filling layer (11), and the self-locking nail buckle (13) can be uniformly ejected.

6. A self-locking intramedullary nail for animal bone fractures according to claim 5, characterized in that: The flow equalizing mechanism comprises: an intramedullary nail inner tube (6), the intramedullary nail inner tube (6) is fixedly installed in the inner part of the intramedullary nail outer tube (1), the intramedullary nail inner tube (6) is located between the intramedullary nail outer tube (1) and the isolation plate (5), the isolation plate (5) and the intramedullary nail inner tube (6) are designed to be concentric, the outer surface of the intramedullary nail inner tube (6) is uniformly provided with a dispersion hole (7), and the intramedullary nail inner tube (6) is located in the inner part of the flexible filling layer (11).

7. The self-locking intramedullary nail for animal fracture of claim 2, wherein: The outer surface of the one-way valve (9) is provided with a threaded screw-in port (10), and the threaded screw-in port (10) and the one-way valve (9) are designed to be concentric, and the threaded screw-in port (10) in the one-way valve (9) is in threaded connection with the pipeline for injecting compressed gelatin.

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