In what position should a patient be placed during thoracentesis?

During thoracentesis, the optimal position for the patient is typically sitting upright, often referred to as the orthopneic position. This position allows for maximum expansion of the lungs and facilitates easier access to the pleural space. When the patient is sitting upright, gravity assists in fluid drainage and helps minimize the risk of complications associated with the procedure.

In this position, the patient can also take deeper breaths, which is beneficial for both the clinician performing the procedure and the patient experiencing respiratory distress. It enhances comfort and stability since the patient can lean forward on a table or support to further open the thoracic cavity.

The other positions such as supine or prone do not provide the same advantages for access to the pleural space or patient comfort. Additionally, the Trendelenburg position, which involves laying the patient back with the legs elevated, may not be conducive for thoracentesis as it can potentially lead to increased intrathoracic pressure and hinder the procedure. Thus, sitting upright is the most effective and safe position for performing thoracentesis.