A contraindication to CPAP use is which condition?

• A. Low blood pressure
• B. Hypertension
• C. Normal blood pressure
• D. Hyperthermia

Answer: (A)

CPAP works by delivering continuous positive pressure to keep airways open and improve oxygenation, but that positive pressure also increases intrathoracic pressure and can reduce venous return to the heart. In a patient who is hypotensive, this drop in preload can lower blood pressure further and worsen perfusion, making low blood pressure a contraindication to CPAP. Hypertension or normal blood pressure do not by themselves prevent CPAP, and CPAP is often used in edema with high blood pressure when the patient can tolerate it. Hyperthermia isn’t a direct contraindication; fever alone doesn’t rule out CPAP as long as the patient’s airway is protected and they’re able to cooperate and maintain appropriate ventilation.