Supplement for Infinity Delta Series Software
58
Supplement – Infinity
®
Delta Series Software VF10.1
MAC (Iso) = 1.15 Vol%
MAC (N2O) = 105 Vol%
xMAC
standard
=
(0.65 Vol% / 1.15 Vol%) + (69 Vol% / 105 Vol%)
= 0.57 + 0.66
= 1.2
Age-Corrected
xMAC
Calculation
When calculating the Age-Corrected
xMAC
for gas mixtures, the respective multiples for N
2
O and
anesthetic agents are added according to the following equation:
Age-Corrected
xMAC
example:
exp. conc. Anesth
1
= etIso = 0.65 Vol%
exp. conc. N2O = etN2O = 69 Vol%
age = 72 years
MAC
age corrected
(Iso, 72 years) =
1.15 Vol% x 10
-0.00269 x (72-40)
= 0.94 Vol%
MAC
age corrected
(N2O, 72 years) =
105 Vol% x 10
-0.00269 x (72-40)
= 86.1 Vol%
xMAC
age corrected
=
(0.65 Vol% / 0.94 Vol%) + (69 Vol% / 86.1 Vol%)
= 0.69 + 0.80
= 1.49
CAUTION
Risk due to incorrect setting for patient age
The patient’s age is derived from the birth date entered in the
Patient Admit
menu. Incorrect settings
can lead to inappropriate
xMAC
values and therefore to inappropriate anesthetic gas delivery.
Always set the patient age correctly.
