Thoracentesis: Definition, Uses, and Clinical Overview
Thoracentesis is a procedure that removes fluid from the pleural space, the thin gap between the lung and chest wall. It is commonly used to evaluate why pleural fluid has accumulated and to relieve shortness of breath. The removed fluid can be tested in a laboratory to help identify infection, cancer, or systemic disease. In gastroenterology and hepatology, it is most often discussed when liver, pancreatic, or malignancy-related conditions cause pleural effusions.