288 Instructions for use | Atlan A100 (XL), A300 (XL), A350 (XL) SW 2.1n
Technical data
15.15 Gas measurement
15.16 Gas measurement with PGM
Information The device is equipped with a patient-gas measure-
ment module (PGM) for O
2, CO2, N2O, and anesthetic
agent, or with an O
2 sensor.
Information This is a sidestream gas measurement, in which the
sample gas is fed back into the breathing system.
End-tidal measured values are calculated for each
breath from the local maxima and minima of the real-
time measurements during expiration.
Standardization All data are standardized to ATPS conditions.
Accuracies Due to the T
10...90 time and the sample gas flow, the
measurement accuracies for O
2, CO2, N2O, and anes-
thetic agent may deviate at respiratory rates of 60 /min
or higher and an I:E ratio of 1:1. The influence of respi-
ratory rate and the I:E ratio on the accuracy has been
verified in a simulated breathing system using a rectan-
gular waveform for the gas concentration.
Sample gas flow 200 ±20 mL/min
standardized to STPD conditions
Maximum time until emptying of the water
trap is necessary
41 hours (sample gas under BTPS conditions and at
23 °C (73.4 °F) ambient temperature)
System response time The system response time results from the typical
delay by the sample line and the gas-type-specific
T
10...90 time of the sensor.
Sensor sampling rate <50 ms
Time after switch-on until the specified
accuracy is attained
<270 s at 20 °C (68 °F) ambient temperature
<480 s at 10 °C (50 °F) ambient temperature
Time until measured CO
2 values are dis-
played (with at least reduced accuracy)
<90 s
Typical delay by the sample line <2.5 s with Dräger sample line, 2.5 m (98.4 in)
Cross sensitivity None concerning alcohol (<3000 ppm in blood), ace-
tone (<1000 ppm), methane, water vapor, NO, and CO
Drift Compensated by automatic cyclic calibration
Calibration During automatic calibration, ambient air is fed to the
breathing system and used as the sample gas.
O
2
Measuring principle Paramagnetic (consumption-free)
Range 0 to 100 Vol%
Accuracy ±(2.5 Vol% + 2.5 % of the measured value)
Resolution of displayed value 1 Vol%
T
10...90 time of the sensor <500 ms
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