A Distributed Microprocessor Respiratory Intensive Care Monitoring System with Mass Spectrometer, Proximal Flowmeter, and Airway Pressure Transducer
Monitoring ventilated patients in the respiratory intensive care unit (RICU) has advanced less rapidly than monitoring in the coronary care unit (CCU). Transducers for analyzing the concentration of gases ventilating the lungs have been unreliable for long term monitoring or have been prohibitively expensive. Flowmeters sufficiently robust and trouble free for use in the proximal airway have not been available. Tidal volume and ventilation monitoring is attempted only occasionally at the exhalation valve of the ventilator. Some ventilators incorporate one or more flowmeters distal to the patient, thus the compressed gas volume is not measured directly and actual tidal lung volumes are frequently over estimated. Pressure monitoring at the proximal airway has been relatively easy — a number of ventilators feature continuous pressure monitoring and a variety of devices are available for airway pressure monitoring with low and/or high pressure alarms.
KeywordsDioxide Respiration Resis Eter Haldane
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