A nurse is assessing a client who is 8 hr postoperative following a right-modified radical mastectomy. Which of the following should the nurse recognize as the priority finding?

A. Urinary output of 100 mL in 4 hr: This indicates a urine output of 25 mL/hr, which is slightly below the expected minimum of 30 mL/hr for adequate renal perfusion. While important to monitor, it is not immediately life-threatening compared to respiratory compromise. B. Coughing frothy, pink secretions: Frothy, pink sputum can indicate pulmonary edema, a potentially life-threatening condition that requires immediate assessment and intervention to prevent respiratory failure. Airway and oxygenation take priority in the postoperative client. C. Emesis of 110 mL of thick, yellow fluid: Postoperative vomiting is concerning for nausea or potential infection, but it is not immediately life-threatening. Management includes antiemetics and monitoring for dehydration. D. Red drainage on the dressing: Some postoperative bleeding is expected, especially in the first few hours after surgery. While the nurse should monitor for excessive hemorrhage, small amounts of red drainage are less urgent than signs of pulmonary compromise.