Which assessment finding is most concerning in a post-operative patient?

In a post-operative patient, the most concerning assessment finding is signs of respiratory distress. This is critical because respiratory complications are among the most serious issues that can arise after surgery, affecting the patient's ability to oxygenate and ventilate properly. Respiratory distress can indicate a range of problems, including atelectasis (collapse of the lung), pneumonia, or a pulmonary embolism, all of which require immediate intervention.

Increased appetite and activity, minor pain at the surgical site, and normal blood pressure readings typically indicate that the patient is recovering well from surgery. Increased appetite and activity can reflect adequate pain management and a return to baseline function. Minor pain at the surgical site is common and expected during the recovery process, as long as it is manageable and not associated with other alarming symptoms. Normal blood pressure readings suggest that the patient is hemodynamically stable, which is a positive sign post-operation. Thus, among these options, signs of respiratory distress are the most urgent and require immediate assessment and intervention.