Negative pressure skin biopsy trephine

Abstract

The invention provides a gathering tool of skin tissue pathological samples, in particular relates to a negative pressure skin biopsy trephine, and belongs to the technical field of medical instruments. The negative pressure skin biopsy trephine comprises a cylinder-shaped trephine body with two ends opened, and a ring-shaped ringing knife is arranged at the front end of the trephine body. The negative pressure skin biopsy trephine is characterized in that an annular rubber plug is arranged in the trephine body and is perpendicular to the inner wall of the trephine body; the front end of a metal pull rod is hinged with the rubber plug, and the rear end extends out of the rear end of the trephine body. The edges of the samples gathered by the ringing knife are tidy and are standard column-shaped, so that the phenomenon is avoided that since the samples are extruded by tweezers, the tissues are damaged, and the quality of samples is improved; the operation stability is increased due to a reasonable structural design; and meanwhile, the surgical time is shortened, the pain of a patient is reduced, and the operation process is simple, easy and convenient.

Description

technical field [0001] The invention provides a skin histopathological sample collection tool, in particular relates to a negative pressure skin biopsy trephine, which belongs to the technical field of medical devices. Background technique [0002] With the development of my country's economy and the improvement of people's living standards, people have higher and higher requirements for the health of their skin. Skin histopathology is of great value in the diagnosis of skin diseases, and at the same time, it is of great significance in understanding the occurrence, development, outcome, general state of the body and the choice of treatment methods. In order to obtain valuable pathological pictures, there must be regular specimens. At present, there are three methods for specimen collection: surgical excision, trephination and cutting. Among them, the surgical incision method and the cutting method are to directly cut off the diseased skin with a scalpel to directly obtain...

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Problems solved by technology

Among them, the surgical incision method and the cutting method are to directly cut off the diseased skin with a scalpel to directly obtain the specimen, which are limited in clinical application due to large trauma, heavy bleeding, and large surgical scars.

The trephine method is currently widely used in major hospitals, especially for those with small early skin lesions or limited to superficial areas or those who have difficulty in surgical removal; corneal trephine is one of the most commonly used tools for taking pathological specimens in dermatology. There is a trephine cutter at the front end of the drill. After the trephine drills into the subcutaneous tissue of the patient, remove the trephine, clamp the specimen with tweezers, and cut the specimen in the fat layer with a knife or scissors; the operation is complicated and easy to squeeze during this process. The specimen is crushed or the specimen is too thick or too large, and repeated circumcisions lead to various defects such as unsharp and tidy margins and irregular shape of the cut surface, which affect the pathological observation results, resulting in unclear or difficult diagnosis. At the same time, the operation time is longer. The patient's mental stress is also greater

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