A client who is admitted for primary hypothyroidism has early signs of myxedema coma. In assessing the client, in which sequence should the nurse complete these actions? (Rank the first action at the top with the remainder in descending order.).

Rationalizing the Priority 1. Airway/Breathing (D): The "A" and "B" of the ABCs take precedence. In myxedema coma, hypoventilation is a primary concern. The client may experience respiratory muscle weakness or a decreased drive to breathe, leading to CO₂ retention and respiratory failure. Assessing the rate, depth, and effort of breathing is the absolute first step. 2. Circulation (B): Once the airway is confirmed, you assess the "C" (Circulation). Myxedema coma causes severe bradycardia and decreased cardiac output, which leads to hypotension. Assessing blood pressure tells the nurse if the client is in cardiogenic shock. 3. Vital Signs/Metabolic State (C): Hypothermia is a hallmark sign of myxedema coma (temperatures can often drop below 95°F or 35°C). While critical, it is addressed after ensuring the heart is pumping and the lungs are moving air. Monitoring temperature is vital because rapid rewarming can actually cause vasodilation and worsen shock. 4. Focused Physical Assessment (A): Palpating for edema is an important part of a head-to-toe assessment for hypothyroidism (non-pitting mucinous edema is common), but it is not a life-saving intervention. It is a secondary assessment compared to the vital signs and respiratory status.