Last week we did the long way of AGE adjusted MAC calculations for singular agents. Original BJA article is here.

Using Maplesons equation:






This week we will adjusted ET concentration using the following equation for Current MAC:


Where Ki is current MAC, FEi = ET concentration, & MACage,i is Maplesons calculation at top for a selected inspired agent.

So using the following values for MAC40 :


Halothane
0.75

Isoflurane
1.17

Enflurane
1.63

Sevoflurane
1.80

Desflurane
6.6

Nitrous oxide
104


Calculate for the actual age adjusted MAC if you have an ET concentration of 2.5% Sevo for a 10 year old vs a 76 year old...show your math please.

Please note that all ET monitors in the US do not adjust for age.