Etco2 (capnography) use and types.

The primary goal of anesthesiologists is to prevent hypoxia, and capnography helps to identify situations that can lead to hypoxia if uncorrected. Moreover, it also helps in the swift differential diagnosis of hypoxia before hypoxia leads to irreversible brain damage.
Because of these advantages, the utility of capnography has recently been extended outside of the operating room arena to emergency rooms, endoscopic suites, x-ray rooms, and even to on-site emergency and trauma fields. Therefore, a section for emergency personnel has been included.

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Great information