Pressure-readable negative-pressure puncture device

Abstract

The invention discloses a pressure-readable negative-pressure puncture device. The pressure-readable negative-pressure puncture device comprises a syringe needle cylinder and a negative-pressure gage, wherein a piston rod is arranged inside the syringe needle cylinder, a piston is arranged at the front end of the piston rod, a negative pressure control valve is arranged at a needle cylinder nib of the syringe needle cylinder, a piston rod telescoping locking device is arranged between the syringe needle cylinder and the piston rod and is used for adjusting the size of negative pressure between the piston and the negative pressure control valve, and a joint of the negative-pressure gage communicates with the syringe needle cylinder at the front end of the piston through a pipeline. According to the pressure-readable negative-pressure puncture device, the negative pressure control valve is closed before puncture, the piston rod is pulled back so as to form negative pressure in the syringe needle cylinder, the size of negative pressure in the syringe needle cylinder is adjusted by using the piston rod telescoping locking device, and the value of the negative pressure in the syringe needle cylinder is accurately read by the negative-pressure gage; the device has the advantages that the influence on the negative pressure caused by pulling the syringe piston and the influence on locating caused by syringe shaking and attention dispersion are effectively avoided, and the entire negative-pressure puncture device is handy and attractive and is convenient in operation.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a pressure-readable negative pressure puncture device. 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 t...

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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