290 Instructions for use | Atlan A100 (XL), A300 (XL), A350 (XL) SW 2.1n
Technical data
15.17 Gas measurement with O2 sensor
Minimum displayed concentration The specified detection thresholds refer to rising anes-
thetic gas concentrations (e.g., at the start of surgery).
If the anesthetic gas concentration falls, a concentra-
tion of as low as 0.05 Vol% will be measured, based on
the last anesthetic agent detected. Below this concen-
tration, a value of 0 Vol% will be displayed.
xMAC
Information Based on the age of the patient, the anesthetic gas
concentration, and the nitrous oxide concentration (the
xMAC value is corrected for ambient pressure)
Range 0.0 to 9.9
Accuracy Refer to the accuracies of the respective measured gas
values.
Resolution of displayed value 0.1
Information The oxygen measurement is performed in the inspira-
tory limb of the breathing system and is pressure-cor-
rected.
Time after switch-on until the specified
accuracy is attained
<180 s
Time after the insertion of the sensor cell
until the specified accuracy is attained
<30 min
Replacement interval of the O
2 sensor cell 2 years
Cross sensitivity None concerning alcohol (<3000 ppm in blood), ace-
tone (<1000 ppm), methane, water vapor, NO, and CO
Drift Compensated by calibration to ambient air, which is
required at least every 7 days within the context of the
system test.
O
2
Measuring principle Electrochemical
Range 0 to 100 Vol%
Accuracy (according to ISO 80601-2-55) ±(2.5 Vol% + 2.5 % of the measured value) for gas mix-
tures with anesthetic gas concentrations
from 0 to max. 2 Vol% (kPa) halothane, isoflurane,
enflurane, or sevoflurane, or
from 0 to max. 8 Vol% (kPa) desflurane
±(2.5 Vol% + 5.0 % of the measured value) for gas mix-
tures with anesthetic gas concentrations
from 2 to max. 4 Vol% (kPa) halothane, or
from 2 to max. 5 Vol% (kPa) isoflurane, enflurane, or
sevoflurane, or
from over 8 to max. 15 Vol% (kPa) desflurane
Resolution of displayed value 1 Vol%
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