A nurse is monitoring a client who is postoperative. Which of the following actions should the nurse take when collecting data about the client's respirations?

A. "Count the client's respirations for 15 seconds" is incorrect. The nurse should count respirations for a full 60 seconds to ensure accuracy, especially in postoperative clients, as irregularities may be more easily detected with a longer observation period. B. "Place the client in a supine position" is not necessary. While the position of the client can affect respiration, the nurse does not need to place the client in a supine position specifically to assess respirations. The client should be in a comfortable position that allows for adequate observation. C. "Inform the client when beginning to observe his respirations" is incorrect. The client should not be aware that their respirations are being counted, as awareness can alter their breathing patterns and lead to inaccurate data. D. "Observe the movements of the client's chest wall" is correct. Observing the chest wall allows the nurse to assess the rate, depth, and rhythm of respirations, as well as any signs of distress or abnormal patterns, which is crucial for monitoring postoperative respiratory status.