Skin biopsy trepan

Abstract

The invention discloses a skin biopsy trepan, belonging to a medical instrument. The skin biopsy trepan comprises a drill rod, a drill bit and a handle, wherein a piston and a push-pull rod are arranged in the drill rod; the handle is vertically arranged on one side of the upper end of the drill rod; a sliding pin is arranged in the handle and is provided with a wedged head for positioning the push-pull rod; the drill bit comprises a drill bit main body, a circular cutter and a slide bushing; the slide bushing is positioned outside the drill bit main body; a return spring is arranged below the slide bushing; the circular cutter is arranged outside the slide bushing; the lower end of the drill bit main body is provided with a perforated plate; and the lower end of the perforated plate is provided with a rubber pad. The skin biopsy trepan has the advantages of rational structure, convenience in operation and capabilities of greatly improving the sampling efficiency of pathological specimens and reliving the pain of a patient.

Description

Technical field [0001] The present invention relates to the technical field of medical devices, in particular to a tool for collecting skin tissue pathological specimens. Background technique [0002] With the deterioration of the environment, and more and more exposure to electronic product radiation in life and work, the incidence of skin diseases has been higher in recent years. In the diagnosis and treatment of skin diseases, the pathological diagnosis of skin tissue is of great value. At present, the methods of collecting pathological specimens mainly include surgical excision, trephine method, and cut method. Among them, the trephine method is widely used and especially suitable In small early skin lesions or confined to superficial areas or those with difficulty in surgical removal. The corneal trephine is a tool for the implementation of the trephine method. It has a trephine knife at the front end. After the trephine is drilled into the patient's subcutaneous tissue, re...

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Problems solved by technology

When this kind of trephine is used, the pathological specimen is absorbed theoretically by the negative pressure inside the trephine body, but in the actual operation process, because the skin is relatively soft, it is difficult for the negative pressure generated inside the trephine body to be evenly applied to the skin , eventually leading to partial upturning, thereby destroying the internal negative pressure of the trephine body, resulting in the failure of skin pathological removal. In addition, limited by the structure of the trephine, it is very inconvenient to use and operate

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