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Ventilators designed to maintain the proper tidal volume during ventilation of patients placed in hyperbaric chambers. Because hyperbaric chambers can have changing atmospheric pressures and high-pressure conditions (up to six absolute atmospheres), these ventilators use an inspiratory flow adjustable controller to maintain proper output while the chamber is pressurizing or depressurizing. Hyperbaric chamber compatible ventilators usually include a control module, patient breathing circuit, tidal volume gas hose, pressure relief valve, and an airway pressure gauge. They are used with pediatric through adult patients.
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