An endoscopic puncture needle capable of quantitatively controlling negative pressure

Abstract

The invention discloses an endoscopic puncture needle capable of quantitatively controlling negative pressure, which belongs to the technical field of medical devices, and comprises a syringe, a main piston is sleeved inside the syringe, and the end face of the main piston is connected with the end surface of a first threaded rod. Fixed connection at one end. In the present invention, through the designed main piston, secondary piston, first threaded cylinder, first rotating shaft, second rotating shaft, first gear, second gear, pressure relief channel, twist wheel, third threaded cylinder, third threaded rod And the mutual cooperation between the second threaded cylinder, it is possible to perform quick adjustment and fine adjustment, so that the quantitative pressure adjustment is more accurate, and there is no need to keep pulling the main piston in the process of using negative pressure to extract the patient's lesion tissue, so the operation is more stable , fine-tune the negative pressure value according to the actual situation, in order to obtain the negative pressure required in the actual operation, so that it can better extract the lesion tissue, and can also prevent the patient's lesion tissue in the syringe from being pushed by the syringe. move out.

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. ), the technical problem solved by this patent is that the existing puncture needles mainly use ordinary syringes for puncture, and the operation is relatively laborious. The operator must constantly pay attention to whether the negative pressure value of the puncture needle is up to the standard while puncturing, and cannot concentrate on positioning For ...

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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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