Interventional Radiology: Abdominal
Paracentesis

Also called: therapeutic paracentesis or diagnostic paracentesis

Paracentesis involves draining excess fluid off the abdomen, which may be due to cirrhosis of the liver or malignancy. Larger amounts may be withdrawn for patient comfort (therapeutic). Smaller amounts may be withdrawn for laboratory tests (diagnostic). Patients generally experience little discomfort during this procedure. If a large volume of fluid is removed for comfort, patients may experience immediate relief following the procedure.

Once pockets of fluid are located with ultrasound usually in the lower abdomen, the radiologist cleanses the area and numbs the site with a local anesthetic, usually Lidocaine. A small tube (catheter), which is connected to a collecting device, is inserted into the abdomen. After fluid is drawn off, the catheter is removed. Usually, only a band aid is needed. The puncture site should heal on its own. Patients should plan for about an hour to complete a paracentesis procedure.

It is generally recommended that patients take it easy for the remainder of the day and resume normal activities the following day. Some bruising may occur at the puncture site.