The Science Journal of the American Association for Respiratory Care

2009 OPEN FORUM Abstracts

GAS CONSUMPTION OF SIX PORTABLE VENTILATORS

Thomas Blakeman1, Dario Rodriquez2, Richard Branson1; 1Department of Surgery, University of Cincinnati, Cincinnati, OH; 2Center for Sustainment of Trauma and Readiness Skills (CSTARS) United States Air Force, University of Cincinnati, Cincinnati, OH

Background: The amount of gas consumed is a product of the ventilator settings and the operating characteristics of the portable ventilators. We evaluated the gas consumption of portable ventilators in a laboratory setting. Methods: We measured the effects of PEEP and FIO2 on gas consumption of six portable ventilators: Impact 754, Versamed iVent, Biomed IC2A, Pulmonetics LTV 1200, Drager Oxylog 3000 and Airon pNeuton. Each ventilator was attached to a Michigan Instruments Training Test Lung to verify FIO2 and tidal volume. Lung Compliance was set at 0.5 L/cmH2O and resistance was 5.0cm H2O/L/s. The respiratory rate was set at 20 breaths/min, tidal volume was 500 ml, and inspiratory time was 1.0 second. We placed a pneumotachograph between the ventilator and the test lung. The output was recorded to document the start and stop time of each study and to verify tidal volume. FIO2 was continuously measured to verify delivered FIO2. Ventilators were evaluated using PEEP of 0 and 20 cmH2O and FIO2 of 1.0, 0.6, and 0.4, if the specific FIO2 options were available. Each ventilator was attached to a full E-type oxygen cylinder and operated until the low oxygen pressure alarm was activated. Data below represents the cylinder duration of each ventilator operating at an FIO2 of 1.0 and PEEP of 0. Data are mean ± SD. Results: Oxygen consumption varied widely between ventilator models. The duration of operation on a full E cylinder ranged from 24 – 276 minutes across all test conditions. Conclusions: Gas consumption of portable ventilators is affected by ventilator operating characteristics. Clinicians must be aware of these differences when planning for patient transport. Sponsored Research - None

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