Broken nail extractor for orthopaedics

Abstract

The invention discloses a broken nail extractor for orthopaedics. The broken nail extractor comprises a nail extracting tube, an enclasping tube, an expander, enclasping clamps, arc-shaped saw blades, annular pawls and radial pawls; the expander is arranged in the nail extracting tube in a screwed manner, and the enclasping tube is arranged outside the nail extracting tube in the screwed manner; a handle is arranged at the upper end of the nail extracting tube, limiting threads are formed in the inner side of the nail extracting tube, a plurality of enclasping clamps and arc-shaped saw blades are arranged at the lower end of the nail extracting tube, a plurality of annular pawls and radial pawls are arranged on inner side faces of the arc-shaped saw blades, and clamp-interior convex joints are arranged at inner sides of the enclasping clamps; a hand grip is arranged at the upper end of the expander, and an expanding bar with expanding ball joints is arranged at the lower end of the expander; the arc-shaped saw blades at the front ends of the enclasping clamps are used for clamping and fixing a broken nail through the annular pawls and the radial pawls which are arranged at the inner sides of the arc-shaped saw blades. According to the broken nail extractor for orthopaedics, the arc-shaped saw blades at the front ends of the enclasping clamps are matched with the annular pawls and the radial pawls, and end parts of broken nails are effectively fixed by the annular pawls and the radial pawls, so that the broken nails are extracted rapidly and conveniently, the groove sliding of the broken nails is prevented, and the efficiency of surgical operation is increased.

Description

technical field [0001] The invention relates to the field of orthopedic appliance technical equipment, in particular to an orthopedic broken nail remover. Background technique [0002] In orthopedic surgery, internal fixation with screws combined with steel plates and hollow screws is a common method, especially half-threaded cancellous bone screws and half-threaded hollow screws are more widely used. After the fracture is fixed, it can reach a stable state and meet the intensity of rehabilitation training, combined with early functional exercise to promote fracture healing. Firstly, the screw needs to be removed after the patient recovers. Due to the structural limitations of ordinary screwdriver tools, the hollow screw can only be rotated. Elderly patients have low bone density and it is difficult to form threads on the bone, causing the bone screw to break and cannot be removed; secondly , part of the bone nail is closely combined with the bone, which is easy to cause th...

AI Technical Summary

Problems solved by technology

Firstly, the screw needs to be removed after the patient recovers. Due to the structural limitations of ordinary screwdriver tools, the hollow screw can only be rotated. Elderly patients have low bone density and it is difficult to form threads on the bone, causing the bone screw to break and cannot be removed; secondly , part of the bone nails are tightly combined with the bone, which can easily cause the bone nails to break and damage; thirdly, the use of forceps extractor is more destructive to the bone, causing unnecessary pain to the patient

[0003] In the prior art, the broken nail remover often fails to fix the broken nail, slips, and cannot rotate. This situation causes some patients to fail to remove the broken nail after the fracture has healed, and can only remain in the body, resulting in physical and psychological problems of the patient. troubled

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