A nurse is assessing a client who had a pleural chest tube with a water seal chamber inserted 48 hr ago. Which of the following findings should the nurse report to the provider?

Nursing care of a client with a pleural chest tube involves monitoring for adequate lung re-expansion, maintaining system patency, and identifying complications such as hemorrhage or air leaks. A chest tube with a water seal chamber is commonly used after thoracic surgery or pleural drainage to remove air, blood, or fluid from the pleural space. Chest tube output must be closely measured, especially in the early postoperative period, to detect abnormal bleeding or excessive fluid loss. Sudden or excessive drainage can indicate a serious complication requiring immediate provider notification. Rationale: A. Drainage of 640 mL in 4 hours is excessive and may indicate active hemorrhage or internal bleeding into the pleural space. Expected drainage should gradually decrease over time; large or increasing amounts of bright red fluid are concerning. This finding requires prompt reporting because it may signal a life-threatening complication such as hemothorax. B. A dressing tightly surrounding the chest tube insertion site is appropriate because it helps maintain an occlusive seal and prevents air entry into the pleural space. The dressing should be secure and intact to reduce the risk of infection and air leaks. This is an expected and desired finding following chest tube insertion. C. Having 2 cm of sterile water in the water seal chamber is correct and indicates proper setup of the drainage system. The water seal acts as a one-way valve to prevent air from re-entering the pleural space during respiration. Maintaining the correct water level is essential for effective functioning of the chest tube system. D. Tidaling in the water seal chamber during respiration is an expected finding and indicates that the chest tube is patent and responding to intrathoracic pressure changes. The water level rises and falls with inhalation and exhalation, confirming proper connection between the pleural space and drainage system. Absence of tidaling may suggest obstruction or lung re-expansion.