Patients who suffer from peritoneal mesothelioma may undergo a paracentesis to confirm the diagnosis or to relieve symptoms of stomach pain or difficulty breathing related to increased abdominal pressure and fluid buildup (ascites). The procedure is often performed as an out-patient surgery and it takes about 20 to 30 minutes. Patients are placed in a bed with their bladder emptied and their head elevated at 45 degrees in order to allow the fluid to accumulate in the lower abdomen.
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