CN218899643U

CN218899643U - Fibula intramedullary nail

Info

Publication number: CN218899643U
Application number: CN202222137698.4U
Authority: CN
Inventors: 谭翔; 支海超; 孙赵楠; 蒋超
Original assignee: Tianjin Zhengtian Medical Instrument Co Ltd; Beijing Naton Medical Technology Holdings Co Ltd
Current assignee: Tianjin Zhengtian Medical Instrument Co Ltd; Beijing Naton Medical Technology Holdings Co Ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2023-04-25
Anticipated expiration: 2032-08-15

Abstract

The utility model discloses a fibula intramedullary nail, and relates to the field of orthopedic implants. The fibular intramedullary nail of the present utility model comprises: the diameter of the distal end of the nail body is larger than that of the proximal end of the nail body, and the included angle between the distal end of the nail body and the nail body ranges from 165 degrees to 178 degrees; a locking screw hole and a light hole are arranged on the far end of the nail body, and the hole axis of the locking screw hole forms an included angle of 90 degrees with the central axis of the far end of the nail body; the hole shaft of the unthreaded hole and the center shaft of the far end of the nail body form an included angle of 60-90 degrees, the locking screw hole is provided with internal threads and is used for being in threaded connection with a locking screw, and the unthreaded hole is used for being in combined screw connection with the lower tibiofibular. The fibular intramedullary nail is provided with the distal end of the nail body and the proximal end of the nail body, the distal end of the nail body is provided with the locking screw hole and the unthreaded hole, the connecting effect with broken bones is good, the fixation of the fracture ends is stable, and the complications are few.

Description

Fibula intramedullary nail

Technical Field

The utility model relates to the field of orthopedic medical instruments, in particular to a fibula intramedullary nail.

Background

The fibula of the human body is positioned at the far end of the lower limb and is one of two long bones of the lower leg, and is thinner and positioned outside the lower leg. The upper end of the tibia is enlarged and called as the fibula small head, and the joint surface at the inner upper part of the tibia is connected with the fibular joint surface of the tibia. The lower end is enlarged and called the lateral malleolus, the inner side surface of the lower end is provided with a flat lateral malleolus joint surface, and the lower end participates in forming an ankle joint. The bone is slender and has auxiliary and supporting functions. The fracture of the fibula has less influence on the load of the lower limb, but the nerve and blood vessel between the fibula are more and more easily damaged, so the treatment should be very careful.

At present, the main treatment scheme of fibula fracture is to use a steel plate for internal fixation or an external fixation bracket for external fixation, but the internal fixation of the steel plate has larger wound, has large difficulty in the operation of implanting the steel plate on the parts of the tibia and fibula with more nerves and blood vessels, causes larger damage to local soft tissues of patients, and causes serious postoperative complications; external fixation is performed by using an external fixation support, the stabilizing effect of the fracture end is poor, and various adverse symptoms such as joint adhesion, stiffness, dysfunction and the like can occur after operation of a patient.

Accordingly, there is a need for a fibular intramedullary nail that addresses the above-described problems.

Disclosure of Invention

The utility model aims to provide a fibular intramedullary nail which is provided with a nail body far end and a nail body near end, wherein a locking screw hole and a light hole are arranged on the nail body far end, the connection effect with broken bones is good, the fixation of fracture ends is stable, and complications are few.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a fibular intramedullary nail, comprising: the diameter of the distal end of the nail body is larger than that of the proximal end of the nail body, and the included angle between the distal end of the nail body and the nail body ranges from 165 degrees to 178 degrees; a locking screw hole and a light hole are arranged on the far end of the nail body, and the hole axis of the locking screw hole forms an included angle of 90 degrees with the central axis of the far end of the nail body; the hole axis of unthreaded hole is 60 ~ 90 contained angles with the center pin of nail body distal end, the locking screw hole is provided with the internal thread, the locking screw hole be used for with locking screw threaded connection, unthreaded hole be used for with lower tibiofibular joint screw connection.

As a preferred version of the fibular intramedullary nail described above, a conical transition is provided between the distal end of the shank and the proximal end of the shank.

As a preferable scheme of the fibular intramedullary nail, the diameter of the distal end of the nail body is 4-8 mm, and the diameter of the proximal end of the nail body is 2-5 mm.

As a preferable mode of the fibular intramedullary nail, the number of the locking screw holes is 3 to 5, and the number of the light holes is 1 to 3.

As the preferable scheme of the fibular intramedullary nail, the tail end of the proximal end of the nail body is in a conical structure.

As a preferable scheme of the fibular intramedullary nail, a countersunk bolt hole is axially arranged on the end face of the distal end of the nail body.

The beneficial effects of the utility model are as follows: the screw is provided with a screw body far end and a screw body near end, the screw body far end is provided with a locking screw hole and a light hole, the locking screw hole is provided with internal threads, the locking screw hole is used for being in threaded connection with the locking screw, the light hole is used for being in combined screw connection with the lower tibiofibular, the fracture end is fixed stably, and the complications are few; the distal end of the nail body is connected with the proximal end of the nail body through a conical transition section, so that stress concentration is avoided, and the strength of a connecting position is improved; the diameter of the distal end of the nail body is 4-8 mm, the diameter of the proximal end of the nail body is 2-5 mm, the included angle between the distal end of the nail body and the central shaft of the proximal end of the nail body is 165-178 degrees, and the physiological characteristics of the fibular diaphysis medullary cavity are met; the tail end of the proximal end of the nail body is in a conical structure, so that the implantation is convenient.

Drawings

Fig. 1 is a top view of an inventive fibular intramedullary nail.

Fig. 2 is a cross-sectional view of an inventive fibular intramedullary nail.

Detailed Description

The utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the same and to refer to the description.

It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or other elements or groups thereof.

As shown in fig. 1-2, the present embodiment provides a fibula intramedullary nail comprising: a shaft distal end 110 and a shaft proximal end 120 connected to the shaft distal end 110, the shaft distal end 110 having a diameter greater than the shaft proximal end 120. The diameter of the distal pin end 110 is 4-8 mm and the diameter of the proximal pin end 120 is 2-5 mm.

The included angle between the distal end 110 of the pin body and the central axis of the proximal end 120 of the pin body is beta, and the included angle beta is 165-178 degrees. Meets the physiological characteristics of the fibular diaphysis cavity.

Connected between the distal shaft end 110 and the proximal shaft end 120 by a conical transition section 111.

A locking screw hole 130 and a light hole 140 are arranged on the distal end 110 of the nail body, and the hole axis of the locking screw hole 130 forms an included angle of 90 degrees with the central axis of the distal end 110 of the nail body; the aperture axis of the light aperture 140 is at an angle alpha to the central axis of the distal end 110 of the shank, the angle alpha being 60-90 deg.. The locking screw hole is provided with the internal thread, and locking screw hole is used for with locking screw threaded connection, and the unthreaded hole is used for with lower tibiofibular joint screw connection.

The number of the locking screw holes 130 is 3 to 5, and the number of the light holes 140 is 1 to 3. Different set screw holes 130 or different light holes 140 may be arranged in different directions along the circumference.

The tail end of the proximal end 120 of the nail body is in a conical structure 121, which is convenient for implanting the fibular intramedullary nail 1.

A countersunk bolt hole 112 is provided axially in the end face of the distal end 110 of the shank for engagement with an implantation tool or with a closure nail.

In use, the fibular intramedullary nail 1 is inserted into the fibular diaphysis intramedullary cavity, the broken bones are fixed by the threaded connection of the locking screw and the locking screw hole 130, and the lower tibiofibular joint is fixed by the cooperation of the lower tibiofibular joint screw and the unthreaded hole 140.

The fibular intramedullary nail 1 provided by the embodiment is provided with a nail body far end 110 and a nail body near end 120, wherein a locking screw hole 130 and a light hole 140 are arranged on the nail body far end 110, the connection effect with broken bones is good, the fixation of fracture ends is stable, and complications are few.

Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims

1. A fibula intramedullary nail, comprising: the diameter of the distal end of the nail body is larger than that of the proximal end of the nail body, and the included angle between the distal end of the nail body and the nail body ranges from 165 degrees to 178 degrees; a locking screw hole and a light hole are arranged on the far end of the nail body, and the hole axis of the locking screw hole forms an included angle of 90 degrees with the central axis of the far end of the nail body; the hole shaft of the unthreaded hole and the center shaft of the far end of the nail body form an included angle of 60-90 degrees, the locking screw hole is provided with internal threads and is used for being in threaded connection with a locking screw, and the unthreaded hole is used for being in combined screw connection with the lower tibiofibular.

2. A fibular intramedullary nail according to claim 1, wherein: and the distal end of the nail body and the proximal end of the nail body are connected through a conical transition section.

3. A fibular intramedullary nail according to claim 2, wherein: the diameter of the distal end of the nail body is 4-8 mm, and the diameter of the proximal end of the nail body is 2-5 mm.

4. A fibular intramedullary nail according to claim 1, wherein: the number of the locking screw holes is 3-5, and the number of the unthreaded holes is 1-3.

5. Fibula intramedullary nail according to claim 1 or 2, characterized in that: the tail end of the proximal end of the nail body is in a conical structure.

6. Fibula intramedullary nail according to claim 1 or 2, characterized in that: and a countersunk bolt hole is axially formed in the end face of the distal end of the nail body.