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Physiologic monitors designed for measurement and display of the partial pressure of the most common gases that are usually present in the breathing respiratory cycle, such as oxygen (O2) and carbon dioxide (CO2). These monitors typically consist of a main unit which includes electronic circuits that can process the signals from attached sensors that detect CO2 and O2 pressure, a display that shows the gas concentrations, and programmable alarms. Some monitors can also display the CO2 waveform and the concentrations of oxygen (O2) and/or nitrous oxide (NO2). Carbon dioxide/oxygen respiration monitors are used to monitor patients at the bedside to detect ventilator failure, and to assess the pulmonary function or the adequacy of perfusion during cardiopulmonary resuscitation; some monitors are configured for intraoperative use in patients under anesthesia.
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