Ultrasound-guided thoracentesis is used to drain excess fluid from the pleural space (the area between the lung and chest wall).
Diagnostic: To obtain a sample of pleural fluid for analysis (e.g., to determine the cause of pleural effusion).
Therapeutic: To relieve symptoms caused by excessive fluid accumulation (e.g., difficulty breathing due to pressure on the lung, inability to lie flat).
Ultrasound imaging is to precisely locate the fluid collection within the pleural space. After local anesthetic is provided, a small needle or thin plastic tube (catheter) is inserted through the skin into the pleural space. The excess fluid is aspirated (withdrawn) using a catheter. Average duration for drainage is 5 minutes. Upon completion of the drainage, a chest x-ray is performed. Recovery is usually straightforward, with most patients experiencing minimal cough symptoms.
