Which condition is a contraindication to CPAP use?

Which condition is a contraindication to CPAP use?

• A. Hypotension
• B. Hypertension
• C. Normal blood pressure
• D. High oxygen saturation

Answer: (A)

The key idea is that CPAP increases intrathoracic pressure, which helps keep alveoli open and reduces the work of breathing, but it also lowers venous return to the heart. In a patient with low blood pressure, this reduction in preload can worsen hypotension and decrease cardiac output, making CPAP unsafe. That’s why hypotension is a contraindication. Hypertension, normal blood pressure, or already high oxygen saturation aren’t by themselves reasons to avoid CPAP; they don’t create the same hemodynamic risk, though the decision to use CPAP still depends on the overall clinical picture.

The key idea is that CPAP increases intrathoracic pressure, which helps keep alveoli open and reduces the work of breathing, but it also lowers venous return to the heart. In a patient with low blood pressure, this reduction in preload can worsen hypotension and decrease cardiac output, making CPAP unsafe. That’s why hypotension is a contraindication.

Hypertension, normal blood pressure, or already high oxygen saturation aren’t by themselves reasons to avoid CPAP; they don’t create the same hemodynamic risk, though the decision to use CPAP still depends on the overall clinical picture.