Gas analyzer
Interference [%
ABS
]Accuracy [%
ABS
]:Gas conc.
± 0.150 - 1% 0CO
2
± 0.21 - 5% 0.1N
2
O
± 0.45 - 10% 0.1O
2
± 0.610 - 15% 0.22nd agent
± 1.015 - 18%
Unspecified> 18%
Desflurane
The accuracy includes stability and effects of device drift during
operation between calibrations.
Drift of measurement accuracy
• The respiration rate limit for accurately measured end-tidal values is < 60 breaths/minute for I:E =
1:1, < 40 breaths/minute for I:E = 1:2 and < 30 breaths/minute for I:E = 1:3.
• The accuracy of the gas measurements may be affected if the Ethanol concentration is higher than
0.1%, the Methane concentration is higher than 1% or the Acetone concentration is higher than 1%.
• The partial pressure and the percentage volume of CO
2
, N
2
O, O
2
and anesthetic agent depend on
the amount of water vapor in the breathing gas. A partial H
2
O pressure of up to 11 cmH
2
O is
automatically compensated for by the analyzer. Higher H
2
O partial pressures will further dilute the
gas sample; at 30 cmH
2
O the general error of all measured gases is -2%.
YESInspiratory and End-Tidal O
2
Concentration
YESInspiratory and End-Tidal CO
2
Concentration
YESInspiratory and End-Tidal N
2
O
Concentration
YESInspiratory and End-Tidal Agent
Concentration
Gas measurement typical response times 10-90%
500 ms at a sampling rate of 225 ml/minO
2
250 ms at a sampling rate of 225 ml/minN
2
O
250 ms at a sampling rate of 225 ml/minCO
2
300 ms at a sampling rate of 225 ml/minAA
Gas measurement typical response times 0-90%
3800 ms at a sampling rate of 225 ml/minO
2
3600 ms at a sampling rate of 225 ml/minN
2
O
3600 ms at a sampling rate of 225 ml/minCO
2
3700 ms at a sampling rate of 225 ml/minAA
Primary anesthetic agent identification
A primary anesthetic agent will be identified by the gas analyzer if the concentration is higher than 0.4%
(ISO accuracy) or 0.15% (Full accuracy)
FLOW-i 4.2, User's Manual
281
| Technical specifications |
13 |
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