Identifying optimal positive end-expiratory pressure with electrical impedance tomography guidance in severe...

Area of Science:

• Neonatal Medicine
• Respiratory Physiology
• Medical Imaging

Background:

• Severe bronchopulmonary dysplasia (BPD) presents significant challenges in mechanical ventilation management.
• Optimizing positive end-expiratory pressure (PEEP) is crucial for infants with heterogeneous lung disease to minimize lung injury.
• Current methods for PEEP titration may not adequately address regional lung variations.

Purpose of the Study:

• To evaluate the feasibility of using electrical impedance tomography (EIT) to guide PEEP titration in infants with severe BPD.
• To determine if EIT-guided PEEP titration can identify an optimal PEEP level that reduces lung overdistension and collapse.
• To assess the clinical impact of EIT-guided optimal PEEP on lung function and ventilatory parameters.

Main Methods:

• A case series design involving five infants with severe BPD undergoing EIT-guided PEEP titration.
• Comparison with a control group of five infants without lung disease requiring intubation.
• Optimal PEEP was defined by minimizing lung overdistension and collapse detected by EIT.
• Lung function, ventilatory, and clinical data were monitored post-titration.

Main Results:

• EIT successfully guided PEEP titration in four out of five infants with severe BPD.
• The identified optimal PEEP level was sustained for at least three weeks in successful cases.
• Three of the four successful titrations resulted in a decreased PEEP compared to baseline.
• One case confirmed that the baseline PEEP was already optimal.

Conclusions:

• Electrical impedance tomography (EIT) is a feasible tool for guiding PEEP titration in infants with severe BPD.
• EIT can aid in identifying optimal PEEP levels in infants with heterogeneous lung conditions.
• This technique offers a novel approach to personalize mechanical ventilation strategies in neonates.