The nurse is assessing a client with a chest tube following a pneumonectomy. Which assessment finding requires nursing intervention?

A. A loose bandage around the chest tube compromises the sterile seal of the dressing, which increases the risk of air entering the pleural space and infection. For a client following a pneumonectomy, maintaining a tight, sterile dressing is essential to prevent pneumothorax or subcutaneous emphysema. This finding requires immediate nursing intervention by reinforcing or replacing the dressing and monitoring the site for signs of air leakage or infection. B. 2 cm of water in the suction control chamber is expected if suction is applied, depending on the prescribed water level. This is normal and indicates proper suction regulation. C. Fluctuation (tidaling) in the water seal chamber with inhalation and exhalation is expected. It indicates patent drainage and lung re-expansion. Lack of tidaling could indicate tube obstruction, kinking, or lung re-expansion. D. Intermittent bubbling in the water seal chamber during coughing is normal. It occurs because increased intrathoracic pressure temporarily forces air through the chest tube. Continuous bubbling at rest, however, would indicate an air leak and require intervention.