CN114159145A

CN114159145A - Elastic intramedullary bow

Info

Publication number: CN114159145A
Application number: CN202010943164.3A
Authority: CN
Inventors: 秦光艳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2022-03-11

Abstract

The invention relates to an elastic intramedullary arch. An elastic intramedullary bow comprises a main nail part and a cable part, and is characterized in that the main nail part is connected with the cable part at the head end, and the main nail part is in an arc-shaped bent shape in a working state. This elasticity intramedullary bow restores to the throne through the elasticity recovery strength of main nail and fixes the fracture broken end to strengthen elasticity strength and prevent the fracture end rotation of shortening through the cooperation of cable portion, overall structure is simple relatively, possess the fixed effect of preventing soon of preferred and convenient the dismantlement.

Description

Elastic intramedullary bow

Technical Field

The invention relates to the field of intramedullary fixation of fracture, in particular to an elastic intramedullary arch.

Background

The intramedullary nail is a common internal fixation instrument for orthopedics, wherein the elastic intramedullary nail is particularly important in fixing the fracture injury of tubular bones of children, but the traditional elastic intramedullary nail needs two synergistic actions, needs two needle insertion positions and has longer relative operation time, and meanwhile, the problems that the tail part of the nail stimulates surrounding soft tissues and the nail is easy to withdraw and the like exist, and the application scene is limited. The prior art can not reach comparatively stable internal fixation effect through single elasticity intramedullary nail down, though there is precession type tail cap to be used for sealing elasticity intramedullary nail tail end at present, nevertheless the nail phenomenon of moving back still takes place occasionally.

Disclosure of Invention

The invention relates to an elastic intramedullary arch. An elastic intramedullary bow comprises a main nail part and a cable part, wherein the main nail part is connected with the cable part at the head end and is in an arc-shaped bent shape in a working state. This elasticity intramedullary bow restores to the throne through the elastic recovery strength of main nail and fixes the fracture broken end to strengthen elastic strength and prevent the fracture end rotation of shortening through the cooperation of cable portion and lock nail, single elasticity intramedullary bow can reach stable fixed, and overall structure is simple relatively, is difficult for moving back the nail inefficacy, and accommodation increases, has the fixed effect of preventing soon and convenient the dismantlement of preferred.

The technical problem to be solved by the invention is realized by the following technical scheme: an elasticity intramedullary bow, includes main nail portion, cable portion, its characterized in that: the main nail part is connected with the cable part at the head end; the main nail part is in an arc-shaped bent shape in the working state, the shape of the main nail part is similar to that of a bow arm, and the working state refers to an effective fixing state after the elastic intramedullary bow is inserted. The head end of the main nail part refers to the part 1/3 of the main nail part far away from the far end of the nail inserting point, and the end corresponding to the main nail part is the head end of the cable part. Further, the head end of the main nail part is provided with a connecting through hole which is used as a part connected with the cable part, the head end of the cable part penetrates through the connecting through hole to be connected with the main nail part and the cable part, and the specific connecting mode can adopt the existing cable connecting technology, for example, the cable penetrates through the connecting through hole and then is reversely folded and fastened by using a chuck, or the cable penetrates through the connecting through hole and then is reversely folded and woven, and the like. In terms of the prior art, the elastic intramedullary arch may be made of titanium or stainless steel, and in view of human tissue compatibility and material safety, the main nail portion is preferably but not limited to a titanium elastic nail, the cable portion is preferably but not limited to a titanium cable, and the collet is preferably but not limited to a titanium wire clip structure or a wire clip structure in the prior art.

Further, the main nail portion has a curved shape at a head end. The bending shape means that the tip of the head end of the main nail part forms an angle of 150 degrees, 135 degrees or 120 degrees with the main nail part, the angle direction and the radian direction of the main nail part can be the same direction or opposite directions, and the bending transition part is smooth arc transition, for example, the bending part is similar to the structure of two ends of a modern recurved bow when the bending part is an opposite angle, and for example, the bending part is the same direction angle, the bending part is similar to the structure of the insertion end of the existing elastic intramedullary nail. The 135 ° angle co-bending is preferably selected in view of easier nailing, and the above example is intended to make the structure of the present invention more understandable to those skilled in the art, and it will be apparent to those skilled in the art that the description of the bending shape and angle is not a limitation on the shape of the main nail portion of the elastic intramedullary arch.

Furthermore, the elastic intramedullary arch also comprises a tail cap structure, and the stimulation effect of the tail end of the main nail part on surrounding soft tissues can be reduced by adding the tail cap. The tail cap structure comprises a main nail tube and a cable tube. Wherein, a cavity is formed at one end of the main nail tube and can accommodate the tail end of the main nail part, thereby preventing the tail end from stimulating surrounding soft tissues. Further, a thread structure can be constructed on the outer wall of the main nail tube, and the thread structure is favorable for gradually rotating the propelling tail cap. Of course, the tail cap can be inserted by knocking without the thread structure. Wherein the cable tube has a through hole structure in the direction of the long longitudinal axis, the through hole accommodating the trailing end of the cable part therethrough. When the tail end of the cable part passes through the clamping head, the cable part can be tightened, the elastic intramedullary arch is in a working state, and the main nail part is bent in an arc shape. It will be understood by those skilled in the art that the main nail portion may also be pre-bent in an arc shape before insertion into the main nail portion, i.e. similar to the way before insertion of the existing elastic intramedullary nail.

Further, the elastic intramedullary bow also comprises a locking nail structure. The locking nail is positioned at the head end of the elastic intramedullary bow, and the locking nail is arranged after the main nail part of the elastic intramedullary bow is inserted into a preset position. The movement of the fracture end connected with the locking nail can be limited by the limiting function of the head end of the elastic intramedullary arch and the head end of the cable part.

The invention has the following beneficial effects: an elastic intramedullary bow comprises a main nail part and a cable part, wherein the main nail part is connected with the cable part at the head end and is in an arc-shaped bent shape in a working state. This elasticity intramedullary bow restores to the throne through the elastic recovery strength of main nail and fixes the fracture broken end to strengthen elastic strength and prevent the fracture end rotation of shortening through the cooperation of cable portion and lock nail, single elasticity intramedullary bow can reach stable fixed, and overall structure is simple relatively, is difficult for moving back the nail inefficacy, and accommodation increases, uses less spare part to realize the fixed effect of preventing revolving of preferred and convenient the dismantlement.

Drawings

FIG. 1 is a schematic view of the anterior aspect of a resilient intramedullary arch;

FIG. 2 is a schematic view of a resilient intramedullary arch in plan view;

FIG. 3 is a cross-sectional view of the tail cap structure of a resilient intramedullary arch;

FIG. 4 is a schematic view of the tail cap of a resilient intramedullary arch in plan view;

fig. 5 is a schematic view of the manner of fixing the head end of the cable portion.

The nail comprises a main nail part 1, a main nail part 11, a connecting through hole at the head end of the main nail part, a bent shape at the head end of the main nail part 12, a cable part 2, a tail cap 3, a main nail pipe 31 of the tail cap, a cable pipe 32 of the tail cap 311, a main nail pipe cavity 321, a cable pipe through hole 4, a locking nail 5, cortical bone and a medullary cavity 51.

Detailed Description

The present invention will be described in detail with reference to the following examples and accompanying drawings. It should be understood by those skilled in the art that the examples are only preferred forms of the invention and are not to be construed as limiting the invention.

Example 1: as shown in fig. 1, 2, 3, 4 and 5, the elastic intramedullary arch comprises a main nail part (1) and a cable part (2), and is characterized in that: the main nail part (1) is connected with the cable part (2) at the head end; when in working state, the main nail part (1) is in an arc-shaped bent shape. The head end of the main nail part (1) refers to the part 1/3 of the far end of the main nail part (1) far away from the nail inserting point.

Furthermore, the main nail part (1) is provided with a connecting through hole (11) at the head end, the connecting through hole (11) is used as a part connected with the cable part (2), the head end of the cable part (2) penetrates through the connecting through hole (11) to realize the connection of the main nail part and the cable part, and the specific connection mode can adopt the existing cable connection technology, such as the cable penetrates through the connecting through hole and then is folded backwards and fastened by using a chuck, or the cable penetrates through the connecting through hole and then is folded backwards and woven, and the like.

Further, the main nail part (1) has a curved shape (12) at the head end. The bending shape (12) means that the tip of the head of the main nail part forms an angle of 150 degrees, 135 degrees or 120 degrees with the main nail part, and the angle of 135 degrees is preferably selected to be bent in the same direction in view of making the nail entering easier.

Furthermore, the elastic intramedullary arch also comprises a tail cap (3) structure. The tail cap (3) comprises a main nail tube (31) and a cable tube (32). One end of the main nail tube (31) is provided with a cavity (311) for accommodating the tail end of the main nail part (1) after being cut short, which is similar to the tail end embedding processing technology of the prior elastic intramedullary nail. Wherein, a thread structure can be constructed on the outer wall of the main nail tube (1), the constructed thread structure is beneficial to gradually rotating and propelling the tail cap (3), and the tail cap (3) can enter through knocking when the thread structure is not available. The cable tube (32) has a structure of a through hole (321) in the longitudinal axis direction, and the through hole (321) receives the tail end of the cable part (2) to pass through. When the tail end of the cable part (2) passes through, the clamping head can be used for tightening the cable part, the elastic intramedullary arch is in a working state, and the main nail part (1) is bent in an arc shape. Of course, it is easily understood by those skilled in the art that the main nail part (1) may be pre-bent in an arc shape before being inserted, similar to the pre-bending treatment method of the existing elastic intramedullary nail.

Further, the elastic intramedullary arch also comprises a locking nail (4) structure. The locking nail (4) is positioned at the head end of the elastic intramedullary arch, and the locking nail (4) is arranged after the main nail part (1) of the elastic intramedullary arch is inserted into a preset position. The movement of the fracture end connected with the locking nail (4) can be limited by the limiting function of the head end of the main nail part (2) and the head end of the cable part (2) of the elastic intramedullary arch.

Example 2: as shown in fig. 1 and 2, in the present embodiment, the head end of the cable portion (2) is connected to the head end curved shape (12) of the main nail portion (1). Under this connected mode, the locking nail (4) of putting into are arranged in cable portion (2), main nail portion (1) head end and the triangle-shaped of cortex of bone (5) formation, behind the taut cable, and the tight contact of sticis of accessible cable portion (2) and locking nail (4) strengthens the locking effect, further prevents that the fracture end from shortening and rotatory aversion.

Example 3: as shown in fig. 1 and fig. 2, in this embodiment, there is no need to construct a tail cap (3) structure, the tail end of the cable portion (2) is directly sleeved and fixed on the short tail end of the main nail portion (1), and the closed loop of the cable tail end is clamped and fixed by using a clamping head.

Example 4: as shown in fig. 1, 2 and 5, the connecting through hole (11) of the main nail part (1) has a penetrating surface side and a penetrating surface side corresponding to the head end of the cable part (2), and the cable is turned back to the penetrating surface side and then forms a closed loop by the chuck, so that the whole volume is increased, and the insertion of the device is possibly interfered. In this embodiment, cable portion (2) head end passes behind main nail portion (1) connect the through-hole (11) and uses the chuck to form the closed loop in the face one side of wearing out of connect the through-hole (11), or directly uses the chuck to press from both sides tight solitary cable head end, and the whole diameter or the closed loop's diameter after pressing from both sides tight because of the chuck is greater than the aperture of connect the through-hole (11) this moment to effectively avoid cable portion (2) to deviate from connect the through-hole (11) when the cable tightens up, reach the purpose of firm connection. Of course, other existing cable connection techniques such as welding and rivet connection may be used at the intended connection.

The drawings are illustrative of various embodiments rather than limiting in form and dimension, and the above embodiments do not limit the scope of the invention, and equivalent structures made by using the contents of the specification and drawings of the present invention are included in the scope of the invention.

Claims

1. An elasticity intramedullary bow, includes main nail portion (1), cable portion (2), its characterized in that: the head end of the main nail part (1) is connected with the cable part (2); when the elastic intramedullary arch is in a working state, the main nail part (1) is in an arc-shaped bent shape.

2. An elastic intramedullary arch according to claim 1, characterised in that the main nail portion (1) has a connecting through hole (11) at the head end.

3. A resilient intramedullary arch according to claim 2, wherein the cable portion (2) passes through the connecting through hole (11).

4. A resilient intramedullary arch according to claim 1, wherein the main spike portion (1) has a curved shape (12) at the head end.

5. The resilient intramedullary arch of claim 1 further comprising a tail cap (3) structure.

6. A resilient intramedullary arch according to claim 5, wherein the tail cap (3) comprises a main nail tube (31) and a cable tube (32).

7. A resilient intramedullary arch according to claim 6 wherein the outer wall of the main nail tube (31) has a threaded configuration.

8. The resilient intramedullary arch of claim 6, wherein the cable tube (32) has a configuration of through holes (321) in the direction of the long longitudinal axis.

9. An elastic intramedullary arch according to claim 1 in which the cable portion (2) is connected at its trailing end to a collet.

10. A resilient intramedullary arch according to any one of claims 1 to 9 further comprising a locking pin (4) arrangement.