[abstract] MECHANICAL VENTILATOR MONITORING INSIDE THE MONOPLACE HYPERBARIC CHAMBER.

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[abstract] MECHANICAL VENTILATOR MONITORING INSIDE THE MONOPLACE HYPERBARIC CHAMBER.

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Title: [abstract] MECHANICAL VENTILATOR MONITORING INSIDE THE MONOPLACE HYPERBARIC CHAMBER.
Author: Hein, S; Weaver, LK; Howe, S
Abstract: BACKGROUND: When treating a mechanically ventilated patient in a monoplace hyperbaric chamber, the respiratory parameters (ventilatory rate, airway pressures, and tidal volume) must be determined by observing gauges inside the chamber and performing hand calculations Which can be tedious, difficult, and inaccurate. There are no alarms on currently available monoplace chamber ventilators. A respiratory monitor was desired to ease the task of calculating the patient respiratory data and to provide alarms for rate and airway pressures. METHODS: The Can-O-Gauge (CORE-M, l. P. precision Instruments, Allston, MA) was tested for operation with the monoplace hyperbaric chamber (Model 2500B, Sechrist Industries, Inc., Anaheim, CA1 and hyperbaric ventilator (Model SODA, Sechrist Industries, Inc.). The Can-Q-Gauge is located outside the chamber. Alarms can be adjusted at anytime, including during the treatment. The reference pressure port of the Can-Q-Gauge was connected to chamber pressure. The positive pressure port of the gauge was connected to the patient airway connection of the ventilator circuit via a pass-through port. The test apparatus included a sechrist SODA ventilator, a patient ventilator circuit, a mechanical test lung (Manley Lung ventilator Performance Analyzer, Medical Developments, Ltd, Chesham, Bucks, England, an analog airway pressure gauge, and a Wright Respirometer (Ferraris Medical Inc., Holland, NY). Simulated lung conditions and ventilator settings were kept constant for different chamber pressures. RESULTS.: Respiratory parameters calculated and displayed by the Can-O-Gauge include: respiratory pressure, respiratory rate, minimum pressure per breath, maximum pressure per breath, inspiratory time, expiratory time, inspiratory / expiratory ratio, mean and peak airway pressure. Audible and visual alarms can be adjusted by the therapist. CONCLUSION: The Can-Q-Gauge enhances the ability to monitor mechanically ventilated patients during hyperbaric oxygen therapy in the monoplace chamber. Quality of care for the patient also improves because the ventilator can be adjusted to keep the patient's respiratory parameters during treatment consistent with their respiratory parameters in the ICU. Alarms and feedback improve the safety of the hyperbaric ventilator by warning the therapist of potential problems.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held June 22-26, 1994. Westin Hotel, Denver, Colorado (http://www.uhms.org)
URI: http://archive.rubicon-foundation.org/5652
Date: 1994

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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