Current ILCOR guidelines advise that capnography is useful during cardiac arrest resuscitation. ETCO2 can be used as a surrogate marker of cardiac output
Capnography and CO2 Detectors: help confirm endotracheal intubation; monitor ventilation during procedural sedation (e.g. via Hudson mask) without mechanical ventilation; monitoring during mechanical ventilation
Capnography waveform interpretation can be used for diagnosis and ventilator-trouble shooting. The CO2 waveform can be analyzed for 5 characteristics:–Height–Frequency–Rhythm–Baseline–Shape