What is the correct starting CPAP pressure in cmH2O?

What is the correct starting CPAP pressure in cmH2O?

• A. 4 cmH2O
• B. 3 cmH2O
• C. 6 cmH2O
• D. 5 cmH2O

Answer: (B)

Starting CPAP pressure is about finding a gentle baseline that keeps the airway open without causing discomfort. A low starting point helps patient comfort during adaptation, reduces mask leaks and aerophagia, and gives a safe starting point from which to titrate upward if needed. Three cmH2O is commonly used as this initial baseline because it provides enough airway support for many patients with obstructive sleep apnea while remaining tolerable for most users. If ongoing obstruction or events are still present during sleep, clinicians or auto-tomb devices will increase the pressure in small steps to reach an effective level. Setting a higher starting pressure can feel abrupt or uncomfortable, which may hurt adherence, so those higher values are usually reserved for the titration process rather than the initial setup.

Starting CPAP pressure is about finding a gentle baseline that keeps the airway open without causing discomfort. A low starting point helps patient comfort during adaptation, reduces mask leaks and aerophagia, and gives a safe starting point from which to titrate upward if needed. Three cmH2O is commonly used as this initial baseline because it provides enough airway support for many patients with obstructive sleep apnea while remaining tolerable for most users. If ongoing obstruction or events are still present during sleep, clinicians or auto-tomb devices will increase the pressure in small steps to reach an effective level.

Setting a higher starting pressure can feel abrupt or uncomfortable, which may hurt adherence, so those higher values are usually reserved for the titration process rather than the initial setup.