| http://www.w3.org/ns/prov#value | - In head injured patients, for example, sustained arterial CO2 levels of 50 mmHg or greater increase blood flow to the brain, thereby raising ICP. Low sustained CO2 levels of 30 or less also worsen neurological outcomes.[9] As EtCO2 reflects arterial CO2 in patients with reasonable perfusion, capnography is a valuable tool for avoiding inadvertent hyper- or hypoventilation.
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