Skin biopsy trephine device

Abstract

The invention discloses a skin biopsy trephine device which comprises a cylindrical trephine body with the two ends open. An annular cutter is arranged at the front end of the trephine body. A piston is arranged in the trephine body and connected with a push-pull rod. The free end of the push-pull rod extends out of a rear end opening of the trephine body and provided with a pushing handle. A cutting edge of the annular cutter is of a shuttle shape. Scale marks are arranged on the outer surface of the annular cutter in the length direction of the annular cutter. According to the skin biopsy trephine device, the cutting edge of the annular cutter is of the shuttle-shaped structure, compared with a circular cutting edge of an existing annular cutter, the shuttle-shaped cutting edge has the advantages that a wound surface is small, alignment suture is easy, healing is fast, and the phenomena of a dog ear and scars are not prone to generation; the scale marks are arranged on the outer surface of the annular cutter, the incision depth can be displayed and the material obtaining depth can be effectively controlled conveniently; in addition, the skin biopsy trephine device is made of metal except for the piston so that the device can be reused after being sterilized and disinfected and use cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a skin biopsy trephine. Background technique [0002] There are currently two methods for collecting skin histopathological specimens: surgical fusiform excision and circular trepanation. The surgical fusiform excision method is to use a scalpel to directly cut off the skin lesion of the affected area to directly obtain the specimen, which is limited in clinical application due to large trauma, heavy bleeding, and large surgical scars. The circular trephine method is suitable for small skin lesions or those with difficulty in surgical excision. The skin defect is circular after sampling, and it is not easy to suture on the line. After suture, it is easy to form "dog ears" with uneven edges and a scar-like appearance; There is no scale display on the front surface of the trephine body, so it is impossible to accurately grasp the depth of the sample. After cutting, tweezer...

AI Technical Summary

Problems solved by technology

Surgical fusiform excision method is to use a scalpel to directly cut off the skin lesion of the affected area to obtain the specimen directly. It is limited in clinical application due to large trauma, heavy bleeding, and large surgical scars.

The circular trephine method is suitable for small skin lesions or those with difficulty in surgical excision. The skin defect is circular after sampling, and it is not easy to suture on the line. After suture, it is easy to form "dog ears" with uneven edges and a scar-like appearance; There is no scale display on the front surface of the trephine body, so it is impossible to accurately grasp the depth of the sample. After cutting, use tweezers to take out the specimen tissue from the trephine body, which is easy to squeeze and damage the tissue sample, thus affecting the pathological diagnosis of the tissue.

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