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High CPAP vs. NIPPV in preterm neonates - A physiological cross-over study
Amit Mukerji1, Muzafar Gani Abdul Wahab2, Abdul Razak2,3
1Department of Pediatrics, McMaster University, Hamilton, ON, Canada. mukerji@mcmaster.ca.
Summary
High levels of continuous positive airway pressure (CPAP) did not negatively affect cardiac output or the work of breathing in preterm infants compared to non-invasive positive pressure ventilation (NIPPV). This finding supports the safe use of high CPAP in neonatal care.
Area of Science:
- Neonatal physiology
- Respiratory support in preterm infants
- Cardiopulmonary function
Background:
- Preterm neonates often require respiratory support.
- Continuous positive airway pressure (CPAP) and non-invasive positive pressure ventilation (NIPPV) are common methods.
- Understanding the physiological impact of different pressure levels is crucial for optimizing care.
Purpose of the Study:
- To compare the physiological effects of high CPAP (≥9 cmH2O) versus NIPPV.
- To assess cardiac output and work of breathing at equivalent mean airway pressures.
- To determine if high CPAP poses risks to cardiopulmonary function in neonates.
Main Methods:
- A crossover study design was employed in preterm neonates.
- Infants were switched between high CPAP and NIPPV modes.
- Left and right ventricular cardiac output and work of breathing indices were measured after 30-minute intervals.
Main Results:
- Fifteen preterm infants were included in the study.
- No significant differences were observed in left or right ventricular output between high CPAP and NIPPV.
- Work of breathing indices also showed no significant differences between the two modes.
Conclusions:
- High CPAP pressures (≥9 cmH2O) are physiologically safe.
- CPAP does not adversely affect cardiac output or work of breathing compared to NIPPV at similar mean airway pressures.
- These findings support the use of high CPAP as a viable respiratory support strategy.
