The nurse is assessing a client who is newly diagnosed with hypothyroidism. Which assessment finding requires immediate intervention?

Rationale: A. Lethargy: Lethargy is a common symptom of hypothyroidism and, while concerning, is not immediately life-threatening. It requires monitoring but does not necessitate urgent intervention. B. Cold intolerance: Cold intolerance reflects the decreased metabolic rate in hypothyroidism. It is uncomfortable but not an emergency and can be managed with environmental and clothing adjustments. C. Hypoventilation: Hypoventilation indicates impaired respiratory function, which can lead to hypoxia and carbon dioxide retention. This is a life-threatening complication requiring immediate intervention to support ventilation and oxygenation. D. Weight gain: Gradual weight gain is typical in hypothyroidism due to slowed metabolism. While important for long-term management, it does not require immediate action.