The Science Journal of the American Association for Respiratory Care

2012 OPEN FORUM Abstracts


Dave N. Crotwell, Donna Dupras, Robert DiBlasi; Respiratory Care, Seattle Children’s Hospital, Seattle, WA

INTRODUCTION: The Philips Respironics NeoPAP is a combined Nasal Continuous Positive Airway Pressure (NCPAP) Heated Humidified High Flow Nasal Cannula (HHHNC) device that uses a single nasal cannula style interface. We performed a bench evaluation of the NeoPAP’s NCPAP and HHHNC modalities. We designed a series of studies to evaluate the performance of the NeoPAP in a premature neonatal spontaneously breathing lung model with and without a large simulated oral leak. Data on differences in lung model pressure were collected between these two forms of support. METHODS: An anatomically accurate premature neonatal nasal airway model, fabricated using a 3D printer and dimensions obtained from a CT-scan of a 28 wk. premature neonate. The nasal airway model was attached to a spontaneously breathing test lung (ASL 5000, Ingmar Medical; settings: R = 100 cmH20/L/sec and C= 0.5 ml/cmH2O RR 50 br/min and Tidal Volume 5 mL. The nasal airway model was then affixed using the Philips Respironics proprietary nasal airway interface: Lung model pressures were measured at 2, 4, 6, 8, and 10 cmH2O of set NCPAP. We then repeated lung model pressure measurements in the HHHNC mode at flows rates of 2,4,5,6, and 7 L/min. Both sets of measurements were then repeated with a large simulated oral leak in an attempt to evaluate the devices leak compensation function. RESULTS: See figure. CONCLUSION/DISCUSSION: These data suggest that while lung model pressures dropped with both modalities in the presence of a large simulated oral leak, the leak compensation available during NCPAP improved the devices ability to maintain stable lung model pressure as compared to HHHNC. From our testing we feel the NCPAP mode on the NeoPAP is better at maintaining stable pressure delivery in the presence of a oral leak. Sponsored Research - None