Description of the Procedure
You may be asked to sit upright on the edge of a bed or chair. Your arms will be resting on a nearby table. If your procedure involves a CT scan, you may be asked to lie on a table. Try to avoid coughing, breathing deeply, or moving during the procedure.
A small patch of skin on your back, chest, or under your armpit will be sterilized. Anesthesia will be applied to this patch. It will help numb the area.
The doctor may use ultrasound or CT scan images to guide the needle and monitor the fluid. A needle or thin plastic catheter will be inserted between your ribs. The needle or catheter is then passed into the pleural space. Some or all of the fluid will be drawn into the syringe.
Placement of Thoracentesis Needle
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Will It Hurt?
You may feel slight pain or a stinging when the needle is first inserted. As the fluid is being extracted, you may feel a sense of pulling. Tell your healthcare team if you feel extreme pain, any shortness of breath, or faint.
At the Care Center
If the thoracentesis is being done for diagnostic reasons, the fluid will be sent to a lab for testing. Often, another chest x-ray will be done to ensure that the fluid has been removed and that there is no sign of a collapsed lung.
The doctor may begin treatment for the cause of the fluid build-up.
Keep the area of skin where the needle was inserted clean and dry to avoid infection. You may have your activity restricted during your recovery.
If a diagnostic thoracentesis was done, ask your doctor when to expect the results.