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Modules designed to be used as a component of a physiologic monitor, along with related devices, to acquire, measure, and process information for the purpose of intermittently or continuously monitoring the partial pressure of carbon dioxide in an exhaled breath. These modules contain electronic circuits or other technology designed to acquire and/or process the signal from one or more physiologic sensors and transmit it to the physiologic monitor, which contains the software designed to support the module\'s intended function(s). Carbon dioxide monitor modules must be inserted in a dedicated location (e.g., \'slot\') within a physiologic monitor (e.g., modular or modular/configured bedside or transport monitor) or related device (e.g., module rack) in order to support the desired function(s). There are several methods for monitoring the concentration of carbon dioxide in an exhaled breath, including mainstream sampling, which uses a sensor placed directly in the breathing circuit or nasal/oral airway cannula, or sidestream sampling, which uses a sensor placed in a remote sampling line connected to the breathing circuit or nasal/oral airway cannula; one module may offer a combination of methods or be dedicated to a single method. Typical functions of exhaled carbon dioxide monitor modules, when used with a physiologic monitor, include display of waveform(s) and numeric values for the concentration of carbon dioxide in an exhaled breath (i.e., end-tidal carbon dioxide concentration) and appropriate initiation of audible/visual alarms.
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