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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
After undergoing a left pneumonectomy, a female patient has a chest tube in place for drainage. When caring for this patient, the nurse must
assistant
The correct answer is  When caring for a patient who is recovering from a pneumonectomy, the nurse should encourage coughing and deep breathing to prevent pneumonia in the unaffected lung.

Because the lung has been removed, the water-seal chamber should display no fluctuations. 
Reinflation is not the purpose of a chest tube.
Chest tube milking is controversial and should be done only to remove blood clots that obstruct the flow of drainage.