What are the functions and precautions of the puncture needle?

Puncture is a diagnostic and therapeutic technique in which puncture needles are inserted into the body cavity to extract secretions for testing, gas or contrast agent is injected into the body cavity for contrast examination or medicine is injected into the body cavity. The purpose is to take blood test, transfusion, transfusion and catheterization for angiography. Puncture needles are mainly used for subdural puncture, ventricle puncture, cerebrovascular puncture, lumbar puncture, pleural puncture, kidney puncture, etc.
Use precautions:
(1) Puncture was performed by choosing straight, blood-rich vessels without venous valves.
(2) Choose the smallest type and shortest trocar for puncture.
(3) Choose the safest puncture tool for puncture.