What compound absorbs CO2 from an anesthesia patient?

The compound that absorbs CO2 from an anesthesia patient is typically sodium hydroxide (NaOH) or calcium hydroxide (Ca(OH)₂) combined with a carrier like a calcium carbonate (CaCO3) or a silicate. These compounds are used in carbon dioxide absorbent canisters within anesthesia machines, where they facilitate the removal of CO2 from exhaled gases, helping to maintain appropriate levels of carbon dioxide in the patient’s breathing system. Common commercial products often utilize a combination of these compounds to enhance their efficacy and safety.