the nurse is checking the chest tube drainage system of a postoperative client who had a right upper lobectomy. the closed drainage system has 300 ml of bloody drainage, and the nurse notes intermittent bubbling in the water-seal chamber. one hour following the initial data collection, the nurse notes that the bubbling in the water-seal chamber is now constant, and the client appears dyspneic. based on these findings, which action would the nurse do first?