Handheld Capnograph Pulse Oximeter Capnographs are used to measure the levels of carbon dioxide (CO2) exhaled by a patient over time (EtCO2), respiration rate, pulse, and saturation of Sp02.
Capnography is the monitoring of the concentration or partial pressure of carbon dioxide (CO₂) in the respiratory gases. Its main development has been as a monitoring tool for use during anesthesia and intensive care. It is usually presented as a graph of expiratory CO₂ (measured in millimeters of mercury, “mmHg”) plotted against time, or, less commonly, but more usefully, expired volume. The plot may also show the inspired CO₂, which is of interest when rebreathing systems are being used. When the measurement is taken at the end of a breath (exhaling), it is called “end tidal” CO₂ (ETCO₂).