What position should the client assume during a thoracentesis?

During a thoracentesis, the client should ideally be positioned upright with their arms and shoulders elevated. This position allows for optimal access to the pleural space, ensuring that the procedure can be carried out safely and effectively. An upright position helps in enhancing lung expansion and reduces the risk of complications. By elevating the arms, it also opens up the intercostal spaces, making it easier for the healthcare provider to insert the needle and drain any excess fluid or air present in the pleural cavity.

In contrast, alternative positions like lying flat on the back or achieving a supine position can hinder access to the thoracic cavity and may lead to complications or ineffective drainage. Being seated with a pillow behind their back may provide some comfort but does not facilitate the necessary access to the pleural area as effectively as the recommended upright position does. Thus, the upright position is the most suitable choice during a thoracentesis.