Your daily dose of clinical tips and quips: Capnography.
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“When reduced cardiac output leads to poor pulmonary perfusion, end-tidal CO2 will be substantially lower than arterial CO2 and, thus, will be an inaccurate reflection of true ventilation.”
-Kris Kruse-Elliott, DVM, PhD, DACVA
From Practical Matters: Abnormally low capnograpy readings may not be due to hyperventilation