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Managing postoperative nausea and vomiting is a critical responsibility of a perianesthesia nurse, and assessing risk factors followed by the administration of antiemetic medications when necessary is an effective approach. This strategy involves identifying patients who are at higher risk for developing nausea and vomiting based on factors such as surgical type, patient history, or use of certain medications like opioids.

By evaluating these risk factors, the nurse can proactively apply targeted interventions. Administering antiemetic medications can significantly alleviate discomfort and prevent complications associated with postoperative nausea and vomiting. This approach is evidence-based and aligns with best practices for enhancing patient safety and promoting recovery.

In contrast, while deep breathing exercises can be beneficial for overall comfort and relaxation, they do not specifically target nausea and vomiting. Similarly, limiting fluid intake could potentially lead to dehydration and increased discomfort after surgery, which is not advisable in the context of managing postoperative symptoms. Finally, disallowing movement until a physician arrives might not be necessary and could hinder recovery if the patient is cleared to move. Therefore, the most effective method for managing postoperative nausea and vomiting involves assessing risk factors and administering appropriate medications as needed.