Table of Contents
Advertisement
Operation
The age-adjusted MAC values are calculated according to the equation of W.W.
Mapleson (British Journal of Anaesthesia 1996, pp. 179-185).
The equation applies to patients older than 1 year.
MAC
For gas mixtures, the respective multiples for N
summed up according to the following equation:
xMAC =
8.6.1.1
Example
Exp. Isoflurane = 0.65 Vol%
Exp. N
Age = 32 years
MAC
MAC
xMAC = 0.54 + 0.63 = 1.2
The influence of other drugs (opioids or intravenous hypnotics) is not considered in
the xMAC calculation.
8.6.1.2
Using the xMAC display
CAUTION
Risk of patient injury due to inaccurate MAC values
The integrated MAC algorithm is based on values determined and defined by
Dräger. These values are guiding values only. The binding values are specified on
the package information leaflet of the anesthetic agent.
► Do not base therapy decisions solely on the xMAC display, but also always
consider the information in the package information leaflets of the anesthetic
agents.
● Use the MAC display as an orientation for anesthetic agent delivery.
1) 40 years
2) 32 years
164
1)
= MAC
x 10
age-adjusted
Exp. conc. agent
1
MAC
age-adjusted
agent
1
O = 69 %
2
for Iso: MAC
age-adjusted
for N
O: MAC
age-adjusted
2
Instructions for use
(–0.00269 x (age –40))
O and anesthetic agents are
2
Exp. conc. agent
+
MAC
agent
age-adjusted
2)
= 1.21 Vol%
2)
= 110 Vol%
|
Atlan A100 (XL), A300 (XL), A350 (XL) SW 2.1n
Exp. conc. N
2
+
MAC
2
age-adjusted
O
2
N
O
2
Advertisement
Table of Contents
