Identifying and treating intrinsic PEEP in infants with severe bronchopulmonary dysplasia

Area of Science:

• Neonatal Medicine
• Pediatric Pulmonology
• Critical Care

Background:

• Infants with severe bronchopulmonary dysplasia (sBPD) often experience airway obstruction, leading to dynamic hyperinflation and intrinsic positive end-expiratory pressure (PEEPi).
• PEEPi can significantly impair patient-ventilator synchrony, causing discomfort and potentially worsening respiratory status.
• Effective management strategies are crucial for improving outcomes in these vulnerable infants.

Purpose of the Study:

• To determine the presence and magnitude of PEEPi in infants with sBPD during spontaneous breathing.
• To evaluate the impact of adjusting ventilator PEEP on patient-ventilator synchrony and comfort.
• To assess the feasibility of measuring PEEPi without pharmacological paralysis.

Main Methods:

• An interventional study involving infants with sBPD.
• PEEPi was measured using esophageal pressure (Pes) and pneumotachometry during pressure-supported breaths.
• Ventilator PEEP was adjusted to minimize PEEPi and wasted efforts (WE), with subsequent measurements of FiO2, SpO2, and sedation requirements.

Main Results:

• Twelve infants were assessed; eight required an increase in set PEEP to optimize synchrony.
• Increasing PEEP resulted in an 18.9% reduction in wasted efforts (WE) and decreased FiO2 requirements.
• Sedation needs were reduced post-intervention, with no adverse events reported during the study.

Conclusions:

• Intrinsic positive end-expiratory pressure (PEEPi) is a measurable phenomenon in infants with sBPD using non-invasive methods.
• Optimizing ventilator PEEP to counteract PEEPi significantly improves patient-ventilator synchrony and may reduce the need for supplemental oxygen and sedation.
• This approach offers a promising strategy for enhancing respiratory support in infants with sBPD.