Trephine broken screw extractor

Abstract

A ring saw broken nail remover, which is composed of a connecting seat, a handle, a clamping handle, a ring saw, a tapered notch, a connecting shaft, a T-shaped through groove, a clamping jaw, a T-shaped thread, etc., the upper part of the connecting seat is connected with the The clamping handle is connected, the left and right sides are connected with the handle, and the lower part is connected with the ring saw. The connecting shaft passes through the connecting seat from the middle and is connected with the jaws. The tapered groove There is a T-shaped thread groove on the mouth, which is used to cooperate with the T-shaped thread on the jaw. Since the thread is arranged in a tapered shape, it can also move radially when the jaw moves up and down, so that The clamping and loosening actions of the jaws are completed. The invention only needs to carry out very shallow drilling to take out the broken nail, and the operation does not need to repeatedly adjust the direction and position, and the operation is simple.

Description

Technical field [0001] The invention relates to a medical device for orthopedic surgery, in particular to a nail remover for removing broken screws used in clinical orthopedic surgery. Background technique [0002] In orthopedic treatment, screws and plates are often used for internal fixation of fractures. However, while the fixation with plates and screws achieves therapeutic effects, due to gravity, muscle strength and other reasons, clinical screw breakages often occur. At this time, measures must be taken to remove the broken screw before the next step of treatment can be carried out. [0003] One of the existing ways to remove the broken nail is to hollow out the bone around the broken nail with a Kirschner wire and a crescent chisel, and then remove the broken nail. This method removes more bone and easily causes iatrogenic fractures. Moreover, it is necessary to constantly adjust the angle, which requires higher requirements for the doctor's operation. In response ...

AI Technical Summary

Problems solved by technology

[0003] One of the existing ways to remove the broken nail is to hollow out the bone around the broken nail with a Kirschner wire and a crescent chisel, and then remove the broken nail. This method removes more bone and easily causes iatrogenic fractures. Moreover, the angle needs to be adjusted continuously, which requires higher requirements for doctors to operate.

In response to these deficiencies, the State Intellectual Property Office has published a nail remover for orthopedic surgery with an application number of 201320156894.4, which is composed of a ring saw, a connecting rod and a handle. Various sizes of screws and longer screws, but this method still needs to hollow out the bone around the screw, leaving a hole larger than the diameter of the screw after surgery. In addition, use a trephine to drill along the screw Holes will cause new wounds, often accompanied by bone marrow outflow and bleeding, which is not convenient for postoperative recovery

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