Importance of Changing CO2 Absorbent in Veterinary Anesthesia Machines

The purpose of a CO2 absorbent in a rebreathing anesthesia circuit is to absorb and remove CO2 from the patient’s exhaled gases so it cannot be rebreathed. Rebreathing CO2 is likely to increase the partial pressure of CO2 in the patient’s blood, resulting in hypercapnia and respiratory acidemia, as well as increased circulating catecholamines. Increased catecholamines may have benefi cial effects on the cardiovascular system, such as improved cardiac output and blood pressure, but they can also increase cardiac work and cause or exacerbate cardiac arrhythmias, effects that may be quite detrimental to some patients.

Read Dr Wagner's full essay here.

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