a needle

Abstract

The invention relates to the technical field of medical apparatus and instruments, and in particular relates to a syringe needle which is characterized in that the inner wall of the syringe needle is of a concave-convex rough surface structure. The syringe needle has the beneficial effects that the structure of the inner wall of the syringe needle is changed, under B-ultrasonic localization, a needle part of a puncture needle enters the lump part, and the concave-convex rough surface structure of the inner wall of the needle part enables the needle part to have lateral shear force in the rotation process through multi-direction lifting and inserting; in the withdrawing of the needle, the residual rate of the sucked cells on the inner wall of the needle part can be improved, so that enough lesion cells can be sucked, and even more the lesion cells are divided from the root and completely sucked; an operator does not need to pull a needle pintle by hand continuously, and the negative pressure inside a needle tube can be effectively controlled under the coordinated positioning of a baffle and a gap, so that the sucking success rate can be improved, a satisfactory smear is prepared, and the lesion nature is judged.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a needle. Background technique [0002] The key to successful cytology examination is to absorb a sufficient amount of diseased cells, which usually depends on the accurate positioning during puncture, sufficient negative pressure in the needle tube, and a high residual cell volume in the needle tube after the needle tube is withdrawn. [0003] At present, ordinary syringes are generally used in China as a device for fine needle puncture and suction of cells from the lesion for biopsy detection. The location of the internal mass is not accurate, and it is easy to damage the surrounding organs or tissues when it is repeatedly lifted and inserted; 2. The operator needs to use one hand to fix the skin at the puncture site, and the other hand to pull the needle plug from the needle tube. It is laborious, and the operator must continue to pull the needle plug. Since the needl...

AI Technical Summary

Problems solved by technology

[0003] At present, ordinary syringes are generally used in China as a device for fine needle puncture and suction of cells from the lesion for biopsy detection. The location of the internal mass is not accurate, and it is easy to damage the surrounding organs or tissues when it is repeatedly lifted and inserted; 2. The operator needs to use one hand to fix the skin at the puncture site, and the other hand to pull the needle plug from the needle tube. It is laborious, and the operator must continue to pull the needle plug. Since the needle tube cannot maintain a large negative pressure, the process of lifting, inserting, and pulling is inconvenient; 3. It affects the reliability of diagnosis. When the mass is hard, the drawn out needle tube Low cellularity and insufficient sampling precludes reliable diagnosis by cytology

The disadvantages of this invention are: 1. There are many holes on the needle, the suction pressure of a single hole is small, the suction pressure is scattered, and it is impossible to extract a sufficient amount of cells; 2. The ability to accurately locate small tumor tissues is poor. It is easy to aspirate a large amount of paratumoral tissue or normal tissue, which affects the reliability of diagnosis; 3. The incidence of needle tract planting is increased, which brings harm to patients

The disadvantages of this invention are: 1. Because of the extension of a gap, the ability to accurately locate small tumor tissues is poor, and some non-tumor tissues may be cut off, which affects the reliability of diagnosis; 2. From "point extraction" to "linear extraction" 3. The structure of the original closed needle is changed, the mechanical strength is reduced, and the risk of broken needle retention is increased.

The defect of this utility model patent is that: the spiral drill type needle core is a needle core with 3 to 7 spiral grooves on the head, and the spiral groove is located outside the needle core wall, and can only be used by cooperating with a hollow drill with a smooth inner wall. Less tissue is obtained, and the overall structure of the specimen is greatly damaged

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