Patient Monitor User Manual Monitoring AG
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is based on the MAC values shown in the following table. The values specified in the table apply
to a patient age of 40 years and are guiding values only.
For gas mixtures, the respective multiples for N
2
O and anesthetic agents are added according to
the following equation.
O
N
MAC
O
N
conc.
exp.
Anesth.
MAC
Anesth.
conc.
exp.
Anesth.
MAC
Anesth.
conc.
exp.
MAC
2
standard
2
2
standard
2
1
standard
1
total
standard,
+
+
=
NOTE:
Age and other factors are not taken into account for standard MAC value calculation.
Age-corrected MAC values
The equation applies to patients older than 1 year.
MAC
age corrected
= standard MAC x 10
(–0.00269 x (age –40))
For gas mixtures, the respective multiples for N
2
O and anesthetic agents are added according to
the following equation.
O
N
MAC
O
N
conc.
exp.
Anesth.
MAC
Anesth.
conc.
exp.
Anesth.
MAC
Anesth.
conc.
exp.
MAC
2
corrected
age
2
2
corrected
age
2
1
corrected
age
1
total
corrected,
age
+
+
=
CAUTION
1 Always set patient age correctly. Incorrect settings can lead to inappropriate MAC
values and therefore to inappropriate anesthetic gas delivery.
2 Age-based MAC values only apply if the patient’s age is
≥
1 year. An aged-based
MAC of 1 year is used if the patient’s age is
<
1 year.
3 If patient age is not entered, the default age-based MAC of 40 years is used.
19.3.4 Monitoring Steps for Masimo IRMA Module
1
Plug the IRMA connector into the IRMA input and switch the power on.
2
Snap the IRMA sensor head on the top of the IRMA airway adapter. It will click into place
when properly seated.
