The Science Journal of the American Association for Respiratory Care

2011 OPEN FORUM Abstracts

THE BRONCHOTRON VENTILATOR: HOW OSCILLATORY CPAP, PULSE FREQUENCY, AND PULSATILE FLOW RATE INFLUENCE THE VENTILATORY DYNAMIC.

Mitchell Goldstein, Michael Terry, Victor Bannis, T. Allen Merritt, Carter Tong, Elba Fayard, Ricardo Peverini; Neonatology, Loma Linda University Children's Hospital, Loma Linda, CA

Background: The Bronchotron is a high frequency ventilator that uses a flow based activation to provide high frequency pulsations to the airway. Pulse Frequency, Oscillatory CPAP, and Pulsatile Flowrate settings can be adjusted using an analog dial for various pediatric critical care and neonatal applications; however, there is little information as to how these interact with each other and what relationship exists with respect to the different settings. Objective: We asked if flow and pressure characteristics were predictable accross pediatric and neonatal critical care applications. Design/Methods: A Sinusoidal Bronchotron (Percussionaire, Sandy Point, ID) was connected in line with a Fleisch Pneumotachogram interfaced with a Validyne (Northridge, CA) flow sensor. Easy Sense for the IBM PC was used to sample flow and pressure data at 100 ms intervals. Pulse Frequency, Oscillatory CPAP, and Pulsatile Flowrate were varied incrementally from 0-11 (on the dial) while flow and pressure data were sampled. Data were analyzed for maximum pressure and flows and fitted to a categorical ternary representation using Statistica 9.0 (StatSoft, Tulsa, OK). Results: Results are detailed in the categorical graphs enclosed for different levels of Oscillatory CPAP. Conclusions: Predictable flow and pressure patterns result from changes in the operating parameters of the Bronchotron. These may be useful in defining a working range from the analog settings. Sponsored Research - None