Capnographs continuously measure the concentration of exhaled CO2 (EtCO2), an essential parameter for monitoring ventilatory efficiency and the correct placement of an endotracheal tube. The range includes portable, standalone, or multiparameter monitor-integrated capnographs, as well as colorimetric capnographs for quick and immediate monitoring. These devices are particularly used during intubation, mechanical ventilation, and post-resuscitation monitoring, and enable early detection of respiratory complications.