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?

Choice A rationale The side-lying or lateral recumbent position with knees drawn up is typically used for lumbar punctures to open the vertebral spaces. For a thoracentesis, which involves removing fluid from the pleural space, this position does not adequately expand the posterior intercostal spaces. It may also make it difficult for the provider to safely access the pleural cavity without risking injury to the lung tissue or other vital thoracic structures during needle insertion. Choice B rationale High Fowler's position involves the client sitting upright at a 90-degree angle. While this is beneficial for respiratory distress, it does not provide the best access to the lower pleural spaces where fluid often accumulates due to gravity. The ribs remain relatively close together compared to a leaning position. Consequently, this position is less than ideal for a thoracentesis compared to positions that manually widen the intercostal spaces for easier and safer needle entry. Choice C rationale The prone position involves lying flat on the stomach. This would be highly inappropriate and dangerous for a thoracentesis as it compresses the chest and limits the clinician's access to the posterior or lateral chest wall where the fluid is located. Furthermore, lying prone can significantly compromise the ventilation of a client who already has a pleural effusion, potentially leading to acute respiratory failure or extreme discomfort during the invasive medical procedure. Choice D rationale Sitting and leaning forward over a bedside table is the preferred position for a thoracentesis. This posture uses gravity to pool pleural fluid at the base of the lungs and effectively widens the intercostal spaces. By spreading the ribs, the clinician has a larger and safer window to insert the needle into the pleural space. It also allows the client to rest their arms comfortably, promoting stability and decreasing the risk of accidental movement.