Rotary beveling biopsy needle

Abstract

The invention relates to a rotary beveling biopsy needle, and relates to the technical field of medical care. The rotary beveling biopsy needle comprises an internal needle and an external needle, wherein the internal needle and the external needle are in coaxial clearance fit; the front end surface of the internal needle is in contact with the inner end surface of the external needle to guaranteethe situation that a beveling edge of the internal needle and a cutting groove are in a same longitudinal position; and after the external needle and the internal needle are inserted in a human bodytogether, the external needle is fixed, and the internal needle axially rotates to cut lesion tissue. According to the rotary beveling biopsy needle disclosed by the invention, through axial rotationresecting, errors caused by longitudinal displacement of a biopsy needle can be effectively reduced; the beveling edge of the internal needle has an inclination of 30 degrees, so that the cutting process can be performed from rear to front, and the reliability in the process of cutting tissue is improved; mounting and fixing structures are arranged at the needle tail of the internal needle and theneedle tail of the external needle, so that the biopsy needle can be quickly mounted on or disassembled from a manipulater; and a transmission gear is also arranged at the needle tail of the internalneedle, so that torque can be directly transmitted from the manipulater, and the biopsy needle is convenient and quick to use.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a rotary oblique biopsy needle. Background technique [0002] In medical diagnosis, it is often necessary to perform biopsy (biopsy) surgery on tumor patients to obtain part of the tissue of the lesion for pathological research. In the past, the traditional biopsy operation mostly used surgical incision, but it was gradually eliminated due to its shortcomings such as large trauma, high cost and low safety factor. In recent years, biopsy surgery is mainly performed by percutaneous puncture with a biopsy needle, which has the advantages of less trauma, less bleeding, and a high success rate of biopsy. The practicability, versatility, sampling method, and appearance of biopsy needles have a great impact on surgery. Therefore, it is particularly important to design a biopsy needle suitable for current biopsy operations. [0003] CN107683114A discloses a method in which a biopsy ne...

AI Technical Summary

Problems solved by technology

First of all, the cutting needle sleeve designed by this method has no needle head, and the cutting process and the cutting process are all completed by the cutting needle body, which leads to a large workload of the cutting needle body with cutting grooves, which is prone to breakage and has potential safety hazards. Moreover, the needle head of the cutting needle body is a fixed-angle slope, which causes the needle head to be not sharp enough, and it is easy to have problems such as difficult penetration; secondly, the cutting edges of the cutting grooves of the cutting needle body designed by this method are all parallel to the axis direction of the needle body , resulting in the simultaneous cutting of the rotary cutting in the longitudinal direction, and the operation of the rotary cutting is completed by the cutting needle body alone, which is unreliable due to the mobility of the tissue in the human body; secondly, the rotary biopsy needle designed by this method After the cutting operation is completed, the cut tissue cannot be isolated and stored immediately, which may easily cause the cut tissue to be lost in the human body, causing greater damage to the human body, and making the biopsy operation fail; finally, the rotary biopsy designed by this method The needle does not involve the installation and fixing structure of the tail, which is not practical and universal

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