Endoscope puncture needle capable of quantitatively controlling negative pressure

Abstract

The invention discloses an endoscope puncture needle capable of quantitatively controlling negative pressure, and belongs to the technical field of medical instruments. The endoscope puncture needle comprises a needle cylinder, a main piston is arranged in the needle cylinder in a sleeving mode, and the end surface of the main piston is fixedly connected with one end of a first threaded rod. According to the endoscope puncture needle, under the mutual cooperation of the designed main piston, an auxiliary piston, the first threaded cylinder, a first rotating shaft, a second rotating shaft, a first gear, a second gear, a pressure relief channel, a torsion wheel, a third threaded cylinder, a third threaded rod and a second threaded cylinder, the quick adjustment and fine adjustment can be carried out, so that the quantitative pressure adjustment is more accurate, a gesture of pulling the main piston is not required to be kept all the time in the process of extracting focus tissue of a patient by utilizing negative pressure, the operation is more stable, the fine adjustment action of the negative pressure value is performed according to the actual situation, so that the negative pressure required in the actual operation is obtained, the focus tissue is better extracted, and the focus tissue of the patient in the needle cylinder can be prevented from being moved out of the needle cylinder under the action of thrust.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to an endoscopic puncture needle capable of quantitatively controlling negative pressure. Background technique [0002] The puncture needle is a medical device for sampling and injecting tissue from various organs such as the kidney, liver, lung, breast, thyroid, prostate, pancreas, testis, uterus, ovary, and body surface during minimally invasive surgery. [0003] The puncture under the endoscope has the advantages of high precision, high safety, less pain for the patient, and outstanding diagnosis and treatment effects, such as "a pressure-adjustable negative pressure puncture syringe" disclosed by China Patent Network (Patent No.: CN 105877814B) , the technical problem solved by this patent is that the existing puncture needles mainly use ordinary syringes for puncture, and the operation is laborious. The operator must constantly pay attention to whether the negative pres...

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Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problem that the negative pressure energy inside the syringe is still controlled by the conventional way of pulling the piston rod horizontally, it is necessary to provide pulling force for the piston rod at all times during the process of extracting the lesion tissue of the patient, the process is unstable, and often After sampling, the fingers of the medical staff are prone to soreness, and they cannot be fine-tuned according to the actual treatment needs, the accuracy is low, and when the negative pressure inside the syringe is high, it is mostly slowly withdrawn to act on the piston rod The pulling force is easy to make the patient's lesion tissue be moved out of the needle barrel by the pushing force, and then it is easy to cause the problem of cross-infection, and a kind of endoscopic puncture needle that can quantitatively control the negative pressure is proposed

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