What peak inspiratory pressure (PIP) should be set on a NeoPuff resuscitator for a term newborn and for a preterm infant?

Peak Inspiratory Pressure Settings for NeoPuff Resuscitator

For term newborns, start with an initial PIP of 20-30 cm H₂O on the NeoPuff; for preterm infants, begin with 20-25 cm H₂O, then titrate based on clinical response (heart rate increase and chest rise). 1

Initial PIP Settings by Gestational Age

Term Newborns (≥37 weeks)

• Starting PIP: 20-30 cm H₂O
• Observational data using T-piece resuscitators in 129 term infants showed median PIP of 30.6 cm H₂O (28.6-31.6) delivered adequate tidal volumes of 4.5 mL/kg 1
• The 2025 AHA/AAP guidelines explicitly state that initial peak inflation pressures of 20-30 cm H₂O are generally sufficient to inflate the lungs in newborns 1

Preterm Infants (especially <32 weeks)

• Starting PIP: 20-25 cm H₂O
• Observational studies in preterm newborns demonstrated that PIP of 20-25 cm H₂O delivered median tidal volumes of 9 mL/kg (3-15.7) 1
• Lower initial pressures reduce risk of lung injury in immature lungs, though higher pressures may sometimes be required 1

Critical Titration Principle

After initiating ventilation, you must actively titrate PIP both up and down during resuscitation to achieve effective but not excessive ventilation 1. This is crucial because:

• Excessive tidal volumes cause lung and brain injury in preterm newborns 1
• Insufficient tidal volumes fail to achieve effective ventilation 1
• The primary assessment of ventilation effectiveness is heart rate increase, with chest movement as a secondary indicator 1

Additional NeoPuff Settings

PEEP Setting

• Set PEEP at 5 cm H₂O for all newborns
• PEEP improves lung function and maintains lung inflation during expiration, though optimal levels remain undetermined 1

Ventilation Rate

• 30-60 inflations per minute (Class 2a recommendation) 1

Inflation Time

• 0.5-1.0 seconds per inflation (Class 2a recommendation) 1
• This aligns with natural breathing patterns of both term and preterm infants 1

Important Device-Specific Caveats for NeoPuff

Auto-PEEP Generation

The NeoPuff has a known design limitation where inadvertent PEEP elevation occurs as lung compliance increases, particularly problematic in term infants with healthy lungs 2:

• At set PEEP of 5 cm H₂O, delivered PEEP can rise to 8.2 cm H₂O in higher compliance lungs 2
• This auto-PEEP may be clinically deleterious during resuscitation 3

PIP Delivery Issues

• At higher compliance (term infants), the NeoPuff may underdeliver the set PIP - at 40 cm H₂O setting, actual delivered pressure was only 35.3 cm H₂O 2
• The device requires 5.7 seconds to transition from PIP 20 to 40 cm H₂O, significantly slower than other devices 4

Gas Flow Rate Considerations

• Standard gas flow rate: 8-10 L/min for typical use
• Higher flow rates (12-15 L/min) reduce imposed resistance and improve pressure stability but may increase peak flows 5

Clinical Decision Algorithm

1. Initial Setup:

   • Term: PIP 20-30 cm H₂O, PEEP 5 cm H₂O
   • Preterm: PIP 20-25 cm H₂O, PEEP 5 cm H₂O
   • Rate: 40-60/min, Inflation time: 0.5-1.0 sec

2. After 30 seconds of ventilation, assess:

   • Heart rate increasing? → Continue current settings
   • Heart rate not improving? → Check mask seal, reposition airway, then increase PIP by 2-5 cm H₂O increments
   • Excessive chest rise? → Decrease PIP by 2-5 cm H₂O

3. Avoid sustained inflations >5 seconds in preterm infants <28 weeks gestation - this is potentially harmful and increases mortality (Class 3: Harm recommendation) 1

Time-Critical Consideration

Every 30-second delay in initiating ventilation increases risk of death or prolonged hospitalization by 16% 1. Do not delay ventilation while fine-tuning settings - start with the recommended initial pressures and adjust based on response.