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End-tidal agent monitoring

Created: 4/1/2007
Updated: 4/1/2007
Volatile agent monitoring, linked to the concept of Minimum Alveolar Concentration (MAC), is employed currently as a reliable measurement for routine use in this area, and yet the incidence of intraoperative awareness has not changed in recent years.

End-tidal agent monitoring is used by modern anaesthetic monitors to calculate MAC.

MAC is a measure of potensy and is defined as the minimum alveolar concentration at steady-state that prevents reaction to a standard surgical stimulus (skin incision) in 50% of patients at 1 atmosphere (i.e. sea level)

Mechanism of action of inhaled anaesthetic agents

Summary of physical properties of the volatile agents
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