Trephine-like broken nail extractor with clip function

Abstract

The invention belongs to the technical field of medical instruments, and relates to a trephine-like broken nail extractor with a clip function. The trephine-like broken nail extractor comprises a body, wherein the body is in a cylinder shape, one end of the body is a chuck end, and the other end of the body is a sawtooth end; outer teeth are arranged on the end face of the sawtooth end, and inner teeth are arranged on the inner wall, on one side of the sawtooth end, of the body; and an axial open groove is formed in the side face of the body and penetrates through the body. According to the trephine-like broken nail extractor , a broken nail can be extracted out with simple operation as long as an extractor with proper diameter is selected and ground counterclockwise along the original screw channel and further tightens the chuck after entering the change of the broken nail; and the perforation is gradually reduced after the extractor perforates and enters, clip or friction is generated on a broken nail by gradually tightened with inner teeth rather than integrally taking out a broken nail by completely breaking the bone around the broken nail, the broken nail is driven to rotate counterclockwise in a threaded manner and is automatically screwed out. Therefore, the trephine-like broken nail extract is relatively small in damage, convenient to use and relatively high in extraction rate.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, and relates to a trephine-like broken nail extractor with a pincer function. Background technique [0002] With the improvement of people's living standards and the development of the construction industry, limb and trunk fractures caused by various accidental injuries are increasing year by year, and patients requiring internal fixation after fractures are also increasing year by year. Plate and screw internal fixation is the standard internal fixation method for fracture treatment. However, 10%-20% of bone nonunions still occur after plate and screw internal fixation. When fracture nonunion occurs, due to metal fatigue, stress shielding, etc., or accidental injury of the patient after surgery, it is not uncommon for the plate and screw to break in clinical practice. In addition, when implementing internal fixation with plate screws, it is first necessary to use an electric drill t...

AI Technical Summary

Problems solved by technology

The disadvantage of these removal methods is that the damage is relatively large, and even iatrogenic fractures may occur; or two steps are required, one is to enlarge the opening, and the other is to use the forceps method to take it out, which is time-consuming and laborious.

Therefore, generally speaking, how to quickly and relatively easily remove broken nails or broken heads is still a difficult problem that has not been effectively solved yet.

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