Our previous post introduced you to the normal and abnormal capnogram and the end-tidal carbon dioxide (ETCO2). In this post, we will dive deeper into ETCO2 and explore how this relates to the clinically significant arterial partial pressure of carbon dioxide (PaCO2). Current guidance encourages using ETCO2 as a stand-in for PaCO2. However, the ETCO2 … Continue reading The PaCO2-ETCO2 Gradient