Supplement – Infinity
®
Delta Series Software VF10.1
57
Supplement for Infinity Delta Series Software
The age-corrected MAC values are calculated using an equation developed by W. W. Mapleson (British
Journal of Anaesthesia 1996, pp. 179-185). The equation applies to patients older than 1 year.
The Delta series monitor allows the user to select whether Standard, Age-Corrected, or no
xMAC
calculation is provided. The
xMAC
calculation is automatically adjusted according to the ambient pressure
measured by the gas analyzer. The influence of other drugs (opiates or intravenous hypnotics) is not
considered in the
xMAC
calculation.
Standard
xMAC
Calculation
When calculating the Standard
xMAC
for gas mixtures, the respective multiples for N
2
O and anesthetic
agents are added according to the following equation:
The
xMAC
standard calculation assumes a patient age of 40.
Standard
xMAC
example:
exp. conc. Anesth1 = etIso = 0.65 Vol%
exp. conc. N2O = etN2O = 69 Vol%
NOTE
These values are guiding values only. The binding
values are specified on the package information
leaflet of the anesthetic agent.
NOTE
The xMAC Calc. selection in the Agent menu determines whether standard, age-corrected, or no xMAC
values are used.
NOTE
When connecting to a Dräger SCIO module or to a device using a protocol other than MEDIBUS.X:
– If Delta receives two anesthetic agents,
xMAC
displays locally only; it is not available on the network
for remote view or storage.
– If Delta receives one anesthetic agent,
xMAC
displays locally and is also available on the network
for remote view and storage, except that at ICS the
xMAC
value is shown without the label and in
Bed View only.
Connection to Dräger devices using MEDIBUS.X protocol does not have these limitations;
xMAC
from
those devices is available on the network and displays correctly, including at ICS Bed View and Main
Screen.
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