Final answer:
The absence of fluctuations in the water seal chamber of a closed chest drainage system should indicate to a nurse that a client's lung has re-expanded.
Step-by-step explanation:
The question focuses on identifying the indication that a client's lung has re-expanded after having a chest tube in place connected to a closed chest drainage system.
The correct answer is B. No fluctuations in the water seal chamber. When a patient has a chest tube in place, the nurse must monitor the drainage system for proper function. A lack of fluctuations (tidaling) in the water seal chamber typically indicates that there is no longer air leaking from the lung into the chest cavity, suggesting the lung has re-expanded. Other options such as oxygen saturation of 95%, no reports of pleuritic chest pain, and occasional bubbling in the water-seal chamber are not as definitive indicators of lung re-expansion.
It's essential for the nurse to assess the entire clinical picture, including a patient's symptoms and diagnostic tests, to determine the status of lung re-expansion conclusively.