A nurse is collecting data from a client who is taking an oral contraceptive. Which of the following findings is a contraindication for the use of oral contraceptives?

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.

A. A negative pressure room is correct. Varicella zoster, which causes chickenpox, is an airborne virus. Therefore, airborne precautions are required, which include placing the client in a negative pressure room to prevent the spread of the virus to other areas of the facility.

B. Administering aspirin is incorrect. Aspirin should not be given to children or adolescents with varicella zoster due to the risk of Reye's syndrome. Instead, an antipyretic such as acetaminophen should be used to treat fever.

C. Contact precautions are not sufficient for varicella zoster, as the virus requires airborne precautions to prevent transmission through the air.

D. Having visitors remain at least 0.91 m (3 feet) away is incorrect. Airborne precautions require that visitors wear appropriate PPE, including respirators, and should not be restricted to 3 feet away. Ideally, visitors should wear full protective gear when entering the room.