A febrile 49-year-old male with HIV/AIDS presents with three days of diarrhea, pale dry mucous membranes, and tachycardia. Which action is most appropriate for initial management?

• A. transport him in Fowler's position.
• B. administer oxygen.
• C. don a face mask and gown.
• D. perform a tilt test.

Answer: (B)

The main idea here is to support oxygen delivery while you assess and treat possible hypoperfusion from dehydration. In a febrile patient with diarrhea who shows signs of dehydration—pale, dry mucous membranes and tachycardia—the priority is to ensure tissues are getting enough oxygen as volume status is evaluated and corrected. Administering oxygen is the quickest, safest way to improve arterial oxygen content and delivery, even if hypoxemia hasn’t been clearly established yet. It buys time and stabilizes the patient.

Placing the patient in Fowler’s position isn’t ideal for dehydration or shock because upright positioning can reduce venous return and worsen perfusion. PPE is important for safety, but it doesn’t address the patient’s immediate treatment needs. A tilt test is unrelated to dehydration or circulatory support and is not indicated here. In a real scenario, you’d also pursue IV access and fluids, but given the options, providing oxygen is the best initial step.