CN214966494U

CN214966494U - Hollow nail for femoral neck sleeve grain

Info

Publication number: CN214966494U
Application number: CN202120855578.0U
Authority: CN
Inventors: 郭曙光
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-12-03
Anticipated expiration: 2031-04-25

Abstract

The utility model discloses a thighbone neck cover line hollow nail contains a main dead lever, a pair dead lever and an interior forcing screw, vice dead lever with the main dead lever cup joint and connect, interior forcing screw run through vice dead lever, and with main dead lever fixed connection. The utility model discloses a thighbone neck cover line hollow nail has following advantage: in the operation treatment of femoral neck fracture, the double effects of reduction fracture and internal fixation are achieved simultaneously, and the stability of an internal fixation system is excellent; because the auxiliary fixing rod can fix the tail part of the hollow nail which is pulled back, embedded and pressed to tighten the fracture line on the outer side of the tuberosity, and can be used as a tension bearing point for reducing fracture and a supporting point for the stress of the femoral neck fracture line, the stability of an internal fixing system is enhanced, the operation failure events such as the swinging, loosening, nail withdrawing, internal fixing failure and the like of the hollow nail are reduced, and the femoral neck fracture rehabilitation is promoted.

Description

Hollow nail for femoral neck sleeve grain

Technical Field

The utility model relates to an orthopedic internal fixation system, in particular to a femoral neck sleeve grain hollow nail.

Background

When the femoral neck fracture is reduced in a closed manner, the conventional hollow nail is of a single structure with a fixed length, threads are arranged at the tip end of the conventional hollow nail, the strength of action of pressurizing and embedding a fracture line is strong, the effective space is small, and the conventional hollow nail is often taken out due to improper length in an operation and then the specification of the conventional hollow nail is adjusted, so that the nail holding strength of a nail channel is reduced, looseness is induced, and the operation process is prolonged.

In addition, the tail part of the existing hollow nail is only pressed on the tuberosity outer cortex, the screw thread fixing effect of the tail part of the existing hollow nail is not available, and the nail is easy to swing, loosen, retreat and lose efficacy of internal fixation due to external forces such as limb movement and the like after operation, so that the operation effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problem existing in the prior art, thereby providing a femoral neck sleeve grain hollow nail.

The above technical problem of the present invention can be solved by the following technical solutions:

the utility model provides a thighbone neck cover line hollow nail which characterized in that, thighbone neck cover line hollow nail contain a main dead lever, a pair dead lever and an interior forcing screw, vice dead lever with main dead lever cup joint and be connected, interior forcing screw run through vice dead lever, and with main dead lever fixed connection.

As the embodiment of the utility model discloses the preferred, the main dead lever contain the king-rod body of a hexagonal prism form, the head of king-rod body be equipped with a main thread head, the inside of king-rod body be equipped with an internal pressure screw, vice dead lever contain the hollow auxiliary pipe body of a hexagonal prism form, the afterbody of auxiliary pipe body be equipped with a pair screw thread head, vice screw thread head in be equipped with the taut cavity of an annular, internal pressure screw run through taut cavity, and with internal pressure screw cooperate.

As a preferred embodiment of the present invention, the head of the inner compression screw is provided with a compression thread section, and the tail of the inner compression screw is provided with a hexagonal screw head.

As the preferred embodiment of the utility model, the main fixing rod, the auxiliary fixing rod and the inner compression screw are made of titanium alloy.

The utility model discloses a thighbone neck cover line hollow nail has following advantage: in the operation treatment of femoral neck fracture, the double effects of reduction fracture and internal fixation are achieved simultaneously, and the stability of an internal fixation system is excellent; because the auxiliary fixing rod can fix the tail part of the hollow nail which is pulled back, embedded and pressed to tighten the fracture line on the outer side of the tuberosity, and can be used as a tension bearing point for reducing fracture and a supporting point for the stress of the femoral neck fracture line, the stability of an internal fixing system is enhanced, the operation failure events such as the swinging, loosening, nail withdrawing, internal fixing failure and the like of the hollow nail are reduced, and the femoral neck fracture rehabilitation is promoted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a three-dimensional structure of a femoral neck sleeve grain hollow nail of the present invention;

FIG. 2 is an exploded perspective view of the femoral neck shell ring hollow nail of FIG. 1;

FIG. 3 is a schematic perspective view of the femoral neck shell thread dowel of FIG. 1;

FIG. 4 is a cross-sectional view of the femoral neck shell ring cannulated nail of FIG. 3 taken along line A-A.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.

As shown in fig. 1 to 4, the hollow nail with sleeve grain for femur neck comprises a main fixing rod 1, an auxiliary fixing rod 2 and an inner compression screw 3, wherein the auxiliary fixing rod 2 is connected with the main fixing rod 1 in a sleeved manner, and the inner compression screw 3 penetrates through the auxiliary fixing rod 2 and is fixedly connected with the main fixing rod 1.

The primary fixing rod 1 comprises a hexagonal prism-shaped primary rod body 11, a primary screw head 12 is arranged at the head of the primary rod body 11, an internal pressurizing screw hole 13 is arranged inside the primary rod body 11, the secondary fixing rod 2 comprises a hexagonal prism-shaped hollow secondary tube body 21, a secondary screw head 22 is arranged at the tail of the secondary tube body 21, an annular tensioning cavity 23 is arranged in the secondary screw head 22, and the internal pressurizing screw 3 penetrates through the tensioning cavity 23 and is matched with the internal pressurizing screw hole 13.

The head of the inner compression screw 3 is provided with a compression thread section 31, the tail of the inner compression screw 3 is provided with a hexagonal head 32, and the inner compression screw 3 is a structural single body.

The main fixing rod 1, the auxiliary fixing rod 2 and the internal compression screw 3 are all made of titanium alloy.

The method of using the femoral neck sleeve thread hollow nail is described below.

Under the conditions of X-ray fluoroscopy and orthopaedics traction bed, the fracture of the neck of femur is reduced in a closed way, and a guide pin towards the head of the neck of the femur is arranged in the external cortex of the tuberosity. Reaming along the guide pin, and screwing in the femur neck trepanning hollow nail with proper length and in a loose and extended state. The auxiliary fixing rod 2 is fixed on the outer cortex of the tuberosity by an auxiliary thread head 22, the main fixing rod 1 is fixed in the femoral head by a main thread head 12, after the two fixing positions are properly adjusted, the inner compression screw 3 is rotated, and then the inner compression screw 3 pulls back the main fixing rod 1, so that the femoral neck fracture line is further reset and embedded and pressed, and the best effect of resetting and inner fixing is achieved.

Because the auxiliary fixing rod 2 can fix the tail part of the hollow nail which is pulled back, embedded and pressed to tighten the fracture line on the outer side of the tuberosity, and can be used as a tension bearing point for reduction fracture and a supporting point for the stress of the femoral neck fracture line, the stability of an internal fixing system is enhanced, the operation failure events such as nail loosening and internal fixing failure caused by swing of the hollow nail are reduced, and the femoral neck fracture recovery is promoted.

Without being limited thereto, any changes or substitutions which are not thought of through creative efforts should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a thighbone neck cover line hollow nail, its characterized in that, thighbone neck cover line hollow nail contain a main dead lever (1), a pair dead lever (2) and one interior forcing screw (3), vice dead lever (2) with main dead lever (1) cup joint and be connected, interior forcing screw (3) run through vice dead lever (2), and with main dead lever (1) fixed connection.

2. The femoral neck trepanning hollow nail as claimed in claim 1, wherein the primary fixing rod (1) comprises a hexagonal prism-shaped primary rod body (11), the head of the primary rod body (11) is provided with a primary screw head (12), the interior of the primary rod body (11) is provided with an internal pressure screw hole (13), the secondary fixing rod (2) comprises a hexagonal prism-shaped hollow secondary tube body (21), the tail of the secondary tube body (21) is provided with a secondary screw head (22), an annular tension cavity (23) is arranged in the secondary screw head (22), and the internal pressure screw (3) penetrates through the tension cavity (23) and is matched with the internal pressure screw hole (13).

3. The femoral neck sleeve thread cannulated nail of claim 2, wherein the head of the internal compression screw (3) is provided with a compression thread segment (31) and the tail of the internal compression screw (3) is provided with a hex head (32).

4. The femoral neck trepanning hollow nail according to claim 2, characterized in that the primary fixation rod (1), the secondary fixation rod (2) and the internal compression screw (3) are all titanium alloy.