What is paracentesis?

Paracentesis is a medical procedure in which a needle or catheter is inserted into the abdomen to remove excess fluid, typically from the peritoneal cavity. This procedure is often performed to diagnose the cause of fluid buildup (ascites) or to relieve symptoms such as abdominal discomfort or difficulty breathing. Paracentesis is commonly used for patients with liver disease, heart failure, or certain cancers. The fluid removed may be sent for laboratory analysis to help determine its cause. The procedure is generally safe, with complications being rare but possible.