A nurse is caring for a client who is scheduled to undergo thoracentesis. In which of the following positions should the nurse place the client for the procedure?

A. Sitting, leaning forward over the bedside table: This position allows maximum expansion of the intercostal spaces and stabilizes the client during thoracentesis. It also helps the healthcare provider access the pleural space safely while minimizing the risk of lung puncture. B. Prone with arms raised over the head: The prone position is not appropriate for thoracentesis, as it does not provide adequate access to the posterior pleural space and can make the procedure technically difficult and unsafe. C. Side-lying with knees drawn up to the chest: While the side-lying position may be used in some cases, especially if the client cannot sit, it is less optimal than sitting upright because it provides limited exposure of the intercostal spaces for needle insertion. D. High Fowler's position: High Fowler’s position improves lung expansion and oxygenation but does not position the client correctly for thoracentesis. Leaning forward while sitting is necessary to open the intercostal spaces for safe needle placement.