Forked puncture trocar

Abstract

The invention relates to a forked puncture trocar, which comprises a puncture needle bushing and at least more than one puncture needle core, and is characterized in that: the puncture needle core has a tubular structure; the head of the puncture needle core is longitudinally cut and formed into a plurality of forks along the periphery; the forks are twisted outwards to be stretched in an umbrella shape; and when the head of the puncture needle core extends into the bushing, the forks are contracted to be tubular. Compared with conventional used puncture needle in which an operation position is judged by a puncture groove at the middle section of a rod, the forked puncture trocar is more accurate in positioning; since a tissue is clamped in the middle of the forks, the forked puncture trocar is difficult to slip off and is therefore more reliable; by replacing the puncture needle core, repeated extraction of the tissue can be performed by puncturing at one time, and even an endoscope can be substituted to perform excision on the tissue within a certain range; the injury to important tissues of tissues in front of a target or diffusion of tumors are not worried; and relative to a pair of biopsy forceps with a joint, the forked puncture trocar has the advantages of small size, high flexibility and capability of reducing the injury to the tissues.

Description

technical field [0001] The invention relates to a medical device, in particular to a fork-shaped puncture trocar whose head is a bifurcated tubular needle core. The fork-shaped puncture trocar can conveniently take the punctured target tissue out of the body. The forked puncture trocar of the present invention can be used not only for diagnosis and treatment, but also for detection, sampling and hollowing techniques in other objects. Background technique [0002] Puncture trocars in the prior art are generally composed of a sleeve and a needle core, wherein the needle core is a pointed or flat tubular needle core, which is too thin to take the tissue out of the body; even if it is specially used for biopsy The puncture needle core is also a 20G (0.8mm) solid puncture and cutting needle core. The middle section of the needle core is 1-1.5cm away from the needle head and the needle body is divided into two longitudinally from the center to the tail end of about 1.5cm. Two sem...

AI Technical Summary

Problems solved by technology

In addition, there is also a bifurcated biopsy forceps with joints, which has the following disadvantages when used in this method: 1, each puncture can only get one tissue; 2, the tissue in the groove is easy to slip off and cannot guarantee to get the tissue; 3, The structure of the tissue to be taken is not at the puncture needle tip but at a place 1cm or more away from the needle tip, which is not only difficult to locate when cutting the tissue, but also increases the possibility of normal important tissue damage in front of the punctured tissue. It is also easy to cause the spread of tumor tissue during biopsy puncture

In addition, there is another kind of biopsy forceps, which is a bifurcated structure with joints, but due to the existence of joints, it has a large volume and does not meet the principle of minimally invasive

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