阅读说明：本技术 一种骨片钉 (Bone fragment nail ) 是由 傅德皓 肖宝钧 刘国辉 杨述华 于 2020-06-08 设计创作，主要内容包括：本发明涉及骨科医疗器械技术领域,尤其涉及一种骨片钉,包括钉杆,钉杆的杆体为实心柱体,所述钉杆的杆体分为施压段杆体和夹持段杆体,施压段杆体的前端设有自攻刀刃,施压段杆体的直径由其下至上逐渐变大且不大于3mm,施压段杆体的侧壁上设有螺纹。所述施压段杆体侧壁上的螺纹分为两段,其中一段由其下端向上延伸,另一段由其上端向下延伸。本发明的优点在于,该骨片钉用于固定小骨片,施压段杆体的直径为渐变式,随着钉杆钻入骨骼中,施压段杆体可以对骨折片进行加压,施压段杆体的侧壁设计螺纹,钉杆钻入骨骼后不易发生移位。(The invention relates to the technical field of orthopedic medical instruments, in particular to a bone fragment nail which comprises a nail rod, wherein the rod body of the nail rod is a solid cylinder body, the rod body of the nail rod is divided into a pressure application section rod body and a clamping section rod body, a self-tapping knife edge is arranged at the front end of the pressure application section rod body, the diameter of the pressure application section rod body is gradually increased from the bottom to the top and is not more than 3mm, and threads are arranged on the side wall of the pressure application section rod body. The thread on the side wall of the rod body of the pressure applying section is divided into two sections, wherein one section extends upwards from the lower end of the rod body, and the other section extends downwards from the upper end of the rod body. The bone fragment nail has the advantages that the bone fragment nail is used for fixing ossicles, the diameter of the rod body of the pressure applying section is in a gradual change type, the rod body of the pressure applying section can apply pressure to bone fragments along with the fact that the nail rod is drilled into the bones, threads are designed on the side wall of the rod body of the pressure applying section, and the nail rod is not easy to displace after being drilled into the bones.)

1. A bone fragment nail which is characterized in that: including the nail pole, the body of rod of nail pole is solid cylinder, the body of rod of nail pole divide into the section body of rod and the centre gripping section body of rod of exerting pressure, and the front end of the section body of rod of exerting pressure is equipped with the self tapping cutting edge, and the diameter of the section body of rod of exerting pressure is supreme grow gradually and be not more than 3mm by it down, is equipped with the screw thread on the lateral wall of the section body of rod of exerting.

2. The bone fragment pin as claimed in claim 1, wherein: the thread on the side wall of the rod body of the pressure applying section is divided into two sections, wherein one section extends upwards from the lower end of the rod body, and the other section extends downwards from the upper end of the rod body.

Technical Field

The invention relates to the technical field of orthopedic medical instruments, in particular to a bone fragment nail.

Background

In clinical orthopedics, instruments for fixing bones comprise screws, kirschner wires and the like, wherein the screws are widely used, but the screws have larger diameters and are suitable for fixing large bones, and the kirschner wires cannot be used when the fracture injury is small or the volume of the fracture part is small, but the kirschner wires have the general diameter of 0.5-2mm and can be suitable for the situations, but the kirschner wires have smooth side walls and weaker pressurizing effect, and are easy to displace after being fixed, so that the fixation is failed or important soft tissues such as nerve vessels and the like are damaged.

Disclosure of Invention

The invention aims to provide a bone fragment nail for fixing ossicle fragments aiming at the prior technical situation.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a bone fragment nail, includes the nail pole, and the body of rod of nail pole is solid cylinder, the body of rod of nail pole divide into the section body of rod and the centre gripping section body of rod of exerting pressure, and the front end of the section body of rod of exerting pressure is equipped with the self tapping cutting edge, and the diameter of the section body of rod of exerting pressure is supreme grow gradually and be not more than 3mm by it down, is equipped with the screw thread on the lateral wall of the section body.

Furthermore, the thread on the side wall of the rod body of the pressure applying section is divided into two sections, wherein one section extends upwards from the lower end of the pressure applying section, and the other section extends downwards from the upper end of the pressure applying section.

The invention has the beneficial effects that:

this bone fragment nail is used for fixed ossicle piece, and the diameter of the section of exerting pressure body of rod is the gradual change formula, and along with during the nail pole bores into the skeleton, the section of exerting pressure body of rod can pressurize the fracture piece, and the lateral wall design screw thread of the section of exerting pressure body of rod, the difficult emergence of nail pole bore into the skeleton after the displacement.

Drawings

FIG. 1 is a schematic structural view of a nail stem of the present invention.

Description of the labeling: 1. self tapping blade, 2, the section body of rod of exerting pressure, 3, the centre gripping section body of rod.

Detailed Description

The invention will be further explained with reference to the drawings.

Referring to fig. 1, a bone fragment nail comprises a nail rod, the rod body of the nail rod is a solid cylinder, and the rod body of the nail rod is divided into a pressure applying section rod body 2 and a clamping section rod body 3. The front end of the pressure applying section rod body 2 is provided with a self-tapping blade 1, the design of the self-tapping blade is the same as that of a Kirschner wire, the tail end of the nail rod is fixed on an electric drill, and the nail rod can be directly drilled into a bone. The diameter of the pressure section rod body 2 is gradually enlarged from bottom to top and is not more than 3mm, the diameter of the pressure section rod body 2 is smaller, the pressure section rod body is suitable for fixing ossicle slices, the diameter of the pressure section rod body 2 is gradually enlarged from bottom to top, and in the process of drilling into the bone, the pressure section rod body 2 has a pressurizing effect on the ossicle slices which are drilled into the pressure section rod body firstly.

The side wall of the pressure section rod body 2 is provided with threads, and the threads are designed to ensure that the pressure section rod body 2 has a pressure effect superior to that of a Kirschner wire and the nail rod is not easy to displace after being drilled into a bone. Preferably, the thread on the side wall of the pressing section rod body 2 is divided into two sections, wherein one section extends upwards from the lower end of the pressing section rod body, the other section extends downwards from the upper end of the pressing section rod body, and the sectional type thread simplifies the processing and manufacturing procedures.

In one embodiment, the diameter of the lower end of the pressure applying section rod body 2 is 1.5mm, the diameter of the upper end of the pressure applying section rod body 2 is 2mm, the length of the pressure applying section rod body 2 is 3-4cm, and the total length of the bone fragment nail is 12 cm.

In another embodiment, the diameter of the lower end of the pressure applying section rod body 2 is 2mm, the diameter of the upper end of the pressure applying section rod body 2 is 2.5mm, the length of the pressure applying section rod body 2 is 3-4cm or 5-6cm, and the total length of the bone fragment nail is 12 cm.

The diameter and length of the pressing section rod body 2 are determined and selected according to the volume and size of the bone fragments.

Specifically, the process of adopting the bone fragment nail to carry out the ossicle fragment fixing operation comprises the following steps: the tail end of the bone fragment nail is fixed on an electric drill, the pressure applying section rod body 2 continuously drills into the bone along with the rotation of the electric drill, the small bone fragments are completely fixed under the pressure applying action, then the electric drill is taken down, and the part of the bone fragment nail, which is exposed out of the bone surface, is cut off or bent from the lower end of the clamping section rod body 3.

The bone fragment nail has the advantages that the bone fragment nail is used for fixing ossicles, the diameter of the pressure applying section rod body 2 is in a gradual change mode, the pressure applying section rod body 2 can apply pressure to bone fragments along with the fact that a nail rod is drilled into bones, threads are designed on the side wall of the pressure applying section rod body 2, and the nail rod is not prone to displacement after being drilled into the bones.

It should be understood that the above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the invention, therefore, all equivalent changes in the principle of the present invention should be included in the protection scope of the present invention.