How does lung puncture biopsy needle do

The main steps of puncture under CT positioning are as follows. First make the chest

A CT scan measures the size, density, and shortest linear distance to the skin of the mass, marks the number of beds, and marks the puncture site on the skin. Then the skin of the puncture site should be disinfected, and the puncture site should be anesthetized

The 18G disposable biopsy needle or semi-automatic biopsy gun is used to puncture the intrapulmonary mass through the skin, subcutaneous tissue, intercostal muscle and pleura. During this process, the direction and depth of the puncture needle are adjusted several times, until the tip of the puncture needle enters the edge of the mass. The patient is instructed to hold his breath, the puncture needle is stimulated, the puncture needle is quickly extracted, and the tissue is taken out for medical examination.