True or False: CPAP is contraindicated for a patient with systolic blood pressure less than 90.

True or False: CPAP is contraindicated for a patient with systolic blood pressure less than 90.

• A. False
• B. True
• C. Not enough information
• D. Depends on oxygen saturation

Answer: (B)

CPAP works by delivering continuous positive pressure to the airways, which increases intrathoracic pressure during breathing. That rise in pressure reduces venous return to the heart (preload), which can lower cardiac output and cause or worsen hypotension. When the systolic blood pressure is already under 90 mmHg, this additional drop in preload and perfusion can be dangerous, so CPAP is contraindicated. If blood pressure is adequate, CPAP can help improve oxygenation in conditions like cardiogenic pulmonary edema, but with SBP <90 it’s avoided.

CPAP works by delivering continuous positive pressure to the airways, which increases intrathoracic pressure during breathing. That rise in pressure reduces venous return to the heart (preload), which can lower cardiac output and cause or worsen hypotension. When the systolic blood pressure is already under 90 mmHg, this additional drop in preload and perfusion can be dangerous, so CPAP is contraindicated. If blood pressure is adequate, CPAP can help improve oxygenation in conditions like cardiogenic pulmonary edema, but with SBP <90 it’s avoided.