What are the standard BiPAP settings for inspiratory positive airway pressure (IPAP) and expiratory positive airway pressure (EPAP/PEEP) when they need to be increased?

Standard BiPAP Parameters for Increasing IPAP and PEEP

For adult patients (≥12 years), start with IPAP 8 cm H₂O and EPAP 4 cm H₂O, increase by at least 1 cm H₂O every 5 minutes until respiratory events are eliminated, maintaining an IPAP-EPAP differential of 4-10 cm H₂O, with maximum IPAP of 30 cm H₂O. 1

Initial Settings

Starting pressures:

• IPAP: 8 cm H₂O (minimum)
• EPAP/PEEP: 4 cm H₂O (minimum)
• For pediatric patients (<12 years): same starting pressures but maximum IPAP is 20 cm H₂O 1

Higher starting pressures may be selected for patients with elevated BMI or during retitration studies 1.

Titration Protocol

Incremental adjustments:

• Increase IPAP and/or EPAP by at least 1 cm H₂O each
• Wait minimum 5 minutes between adjustments
• Continue until respiratory events are eliminated or maximum pressure reached 1

Which pressure to increase depends on the respiratory event type:

• Obstructive apneas: Increase both IPAP and EPAP (≥2 apneas in adults, ≥1 in children) 1
• Hypopneas: Increase IPAP only (≥3 hypopneas in adults, ≥1 in children) 1
• RERAs: Increase IPAP only (≥5 RERAs in adults, ≥3 in children) 1
• Snoring: May increase IPAP (≥3 minutes in adults, ≥1 minute in children) 1

Pressure Limits and Differentials

Maximum pressures:

• Adults (≥12 years): IPAP maximum 30 cm H₂O 1, 2
• Children (<12 years): IPAP maximum 20 cm H₂O 1

Pressure support (IPAP-EPAP differential):

• Minimum differential: 4 cm H₂O
• Maximum differential: 10 cm H₂O 1

For chronic hypoventilation syndromes, pressure support of 4-20 cm H₂O may be used, with typical IPAP values around 20 cm H₂O and low EPAP (2-4 cm H₂O) unless concurrent OSA is present 2, 3.

Clinical Considerations

When to stop titrating:

• Achieve ≥30 minutes without breathing events
• Reach maximum recommended IPAP
• Patient reports pressure is too high 1

If patient complains pressure is too high:

• Restart at a lower pressure that allows comfortable return to sleep
• Resume gradual titration 1

Treatment-emergent central apneas:

• Consider decreasing IPAP or switching to spontaneous-timed (ST) mode with backup rate 1

Pressure exploration:

• Once control is achieved, IPAP may be increased up to 5 cm H₂O above the control pressure to optimize upper airway resistance 1

Common Pitfalls

The evidence is clear that systematic, gradual titration is essential. Avoid jumping pressures too quickly or skipping the 5-minute observation intervals, as this prevents adequate assessment of treatment response. The differential between IPAP and EPAP must be maintained within the 4-10 cm H₂O range to ensure adequate ventilatory support while avoiding patient-ventilator dyssynchrony 1.

For patients requiring pressures beyond standard CPAP capabilities (>20 cm H₂O), BiPAP devices become necessary for optimal treatment 4.