How it works Samples of cells or fluid are obtained for microscopic examination. Preparation You must avoid eating and drinking for six to 12 hours before the procedure. You remove all clothing above the waist and don a hospital gown. Local anesthesia is applied to your skin and tissue under the skin. Test procedure You lie on a scanning table on your stomach or back, depending on the location of the tissue to be biopsied.
Local anesthesia is injected into the muscle of the chest wall.
An imaging device such as a CT scanner or fluoroscope is used to guide appropriate placement of the needle. When the needle is about to penetrate the pleura, you are asked to hold your breath. The sample is sent to the laboratory for microscopic examination. You will remain in bed in the recovery area for up to three hours while your pulse, breathing, blood pressure, and temperature are monitored periodically. You are free to leave after the recovery period, but you should have someone drive you home.