A negative pressure puncture needle

Abstract

The invention discloses a negative pressure puncture needle cylinder. The negative pressure puncture needle cylinder comprises a syringe needle cylinder, a piston rod is arranged in the syringe needle cylinder, and a piston is arranged at the front end of the piston rod; a needle cylinder mouth of the syringe needle cylinder is provided with a negative pressure control value, and a piston rod telescoping locking device is arranged between the syringe needle cylinder and the piston rod and used for regulating the size of negative pressure between the piston and the negative pressure control valve; the front portion of the syringe needle cylinder is connected with a pressure monitoring tube, one end of the pressure monitoring tube is communicated with the syringe needle cylinder arranged in front of the piston, the other end of the pressure monitoring tube is closed, a pressure marking ball is arranged in the pressure monitoring tube, pressure scale marks are formed on the tube wall of the pressure monitoring tube, and the pressure monitoring tube is made of a transparent material. According to the negative pressure puncture needle cylinder, the negative pressure control valve is switched off before puncturing, the negative pressure is formed in the syringe needle cylinder by backwards drawing the piston rod, then the negative pressure in the syringe needle cylinder is regulated through the piston rod telescoping locking device to enable the negative pressure to meet the puncturing requirements and keep stable, and the negative pressure value in the syringe needle cylinder can be read through the pressure scale marks.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a negative pressure puncture needle cylinder. Background technique [0002] Puncture is a diagnosis and treatment technique in which a puncture needle is inserted into the body cavity to extract secretions, tissues, and cells for laboratory tests, injecting gas or contrast agent into the body cavity for contrast examination, or injecting drugs into the body cavity. It is a commonly used clinical method for disease diagnosis or treatment method has an irreplaceable role of other methods. At present, 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 pressure value of the puncture needle is up to the standard when puncturing, and cannot concentrate on locating the lesion. Abnormal conditions such as syringe shaking affect the puncture, and the negative p...

AI Technical Summary

Problems solved by technology

At present, 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 pressure value of the puncture needle is up to the standard when puncturing, and cannot concentrate on locating the lesion. Abnormal conditions such as syringe shaking affect the puncture, and the negative pressure of the conventional puncture needle is unstable, which may easily lead to unsatisfactory tissue or cell suction at the puncture site, which is difficult to meet the needs of clinical pathological smear examination, and repeated punctures are prone to inflammatory reactions and patient discomfort reaction, causing bleeding at the surgical site, local metastasis of tumor or cancer cells

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