Trocar assembly facilitating minimal lesion sampling and sampling method thereof

Abstract

The invention discloses a trocar assembly facilitating minimal lesion sampling and a sampling method of the trocar assembly, and relates to the technical field of medical instruments. A sampling needle core is arranged in a trocar and is in clearance fit with the trocar; the acupuncture siphon part of the sampling needle core is positioned at one end of the sampling needle core and can be inserted into pathological tissues; a plurality of small linear grooves are formed in the large groove and are used for cell brushing inspection; a trocar needling part is arranged at the position, close to an opening of the needling siphon part, of the trocar, the trocar needling part is used for enabling the large groove to carry part of tissue to move to the trocar needling part to be separated from the diseased tissue, and the separated sample tissue is stored between the large groove and the trocar. The two guide slideways which are communicated through the arc-shaped slideway are arranged in the trocar, the position of the trocar is kept immovable by front-back plugging and rotation of the sampling needle core in the trocar, and the sampling needle core in the trocar is replaced to realize multiple sampling of pathological tissues, so that the sampling success rate and the sampling efficiency are greatly increased.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a trocar assembly and a sampling method for facilitating sampling of minor lesions. Background technique [0002] Histological and cytological biopsies are recognized by the medical community as the "gold standard" for clinical pathological diagnosis. Needle biopsy is the main way to obtain pathological diagnosis, especially needle biopsy for thyroid. At present, the cutting principles of percutaneous biopsy needle products in clinical use are mainly two types: lateral cutting and end cutting. [0003] The existing sampling needles used for needle aspiration biopsy of thyroid or lymph nodes have a single function, and can only absorb some cells for biopsy, and cannot achieve the collection of some tissues, which not only increases the difficulty of disease diagnosis, but also reduces the scope of application of sampling needles; However, the existing sampling...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a trocar assembly and a sampling method that is convenient for sampling small lesions, through a trocar, a sampling needle core, a magnetic connection ring, a curved guide groove, a guide slide, an arc slide, a large The design of grooves, small linear grooves, magnetic firmware and spherical stoppers solves the problem that the existing sampling needle can only absorb some cells for biopsy, and cannot realize the collection of some tissues, which not only increases the difficulty of disease diagnosis, but also The scope of application of the sampling needle is reduced, and multiple sampling of tissue samples cannot be realized without pulling out the sampling needle, which leads to the problem that the success rate and efficiency of sampling are greatly reduced

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