Scio Monitoring
378 Instructions for use – Infinity Acute Care System – Monitoring Applications VG6.n
For gas mixtures, the respective multiples for N
2O
and anesthetic agents are added according to the
following equation:
Example:
exp. Iso. = 0.65 Vol%; exp. N
2O = 69%;
age = 32 years
MAC
age-corrected from Iso.: MAC
1
= 1.21 Vol%
MAC
age-corrected from N2O: MAC
**
= 110 Vol%
xMAC = 0.54 + 0.63 = 1.2
The influence of other drugs (opiates or
intravenous hypnotics) is not considered in the
xMAC calculation.
Zeroing the gas analyzer
The gas analyzer automatically purges and zeroes
itself and does not require any interaction by the
user.
If the IACS has been in Standby or Discharge for
less than two hours, the gas analyzer is available
without zeroing for at least the first 90 minutes of
monitoring.
However, if the IACS and/or gas analyzer has been
powered down or has been in Standby or Discharge
for more than two hours, a warm-up procedure
occurs when the IACS begins monitoring. The
warm-up procedure includes zeroing and can take
up to 7.5 minutes. During this time, accuracy is
reduced.
During zeroing:
– Waveforms flatline
– The status bar displays the message Scio
zeroing is in progress
– Active Scio alarms continue to display
During the first 25 seconds of zeroing, the Scio-
related parameter fields (CO
2, O2, N2O, Agents)
display the last valid values.If zeroing takes longer
than 25 seconds, those parameter fields display
"CAL"
xMAC
exp. conc. Anesth.
1
MAC
age-corrected
Anesth.
1
exp. conc. Anesth.
2
MAC
age-corrected
Anesth.
2
exp. conc. N
2
O
MAC
age-corrected
N
2
O
+ + =
1 32 years
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