What are the typical starting BiPAP settings (IPAP/EPAP) and FiO2?

• A. 8/4 cmH2O with FiO2 as needed
• B. 12/6 cmH2O with FiO2 0.40
• C. 4/2 cmH2O with FiO2 0.21
• D. 10/5 cmH2O with FiO2 0.50

Answer: (A)

Starting BiPAP involves providing modest inspiratory pressure support while keeping a baseline airway pressure, with the oxygen level adjusted to meet the patient’s oxygenation needs. An IPAP of 8 cmH2O and an EPAP of 4 cmH2O gives enough assist to improve ventilation without causing excessive pressure or discomfort, and letting FiO2 be tailored to the patient’s status (FiO2 “as needed”) helps achieve target oxygen saturation without automatically delivering high oxygen. Higher inspiratory pressures (like 12 cmH2O) or higher base pressures (EPAP) can be uncomfortable or poorly tolerated at the outset, and starting with too little support (4/2 cmH2O) may not adequately aid ventilation. Fixed high FiO2 (such as 0.40 or 0.50) may be unnecessary or risky if the patient’s oxygen needs are lower or if they can be met with a lower FiO2. So the standard starting settings are moderate pressures with FiO2 titrated to achieve the desired oxygenation.