GE HEALTHCARE B20, User'S Reference Manual

Page: 56 / 320

B40/B20 Patient Monitor
2-28
NOTE: E-miniC measurement is intended for patients weighing over 5 kg (11 lb).
Disturbing gas and its effect
•
Halotane (4%): increases CO
2
(5 vol%) < 0.3 vol%
•
Isoflurane (5%): increases CO
2
(5 vol%) < 0.4 vol%
•
Enflurane (5%): increases CO
2
(5 vol%) < 0.4 vol%
•
Desflurane (24%): increases CO
2
(5 vol%) < 1.2
vol%
•
Sevoflurane (6%): increases CO
2
(5 vol%) < 0.4 vol%
•
N
2
O (40%): increases CO
2
(5 vol%) < 0.4 vol%
•
Helium (50%): decreases CO
2
(5 vol%) < 0.3 vol%
•
If O
2
compensation is not activated: O
2
(40-95%)
decreases < 0.3 vol%
•
If O
2
compensation is activated: O
2
(40-95%) error
< 0.15 vol%
•
If N
2
O compensation is not activated: N
2
O (40-
80%) increases < 0.8 vol%
•
If N
2
O compensation is activated: N
2
O (40-80%)
error < 0.3 vol%
E-sCO, E-sCAiO, N-CAiO module
Non-disturbing gases: - Ethanol C
2
H
5
OH (< 0.036%)
- Acetone (< 0.2%)
- Methane CH
4
(< 0.3%)
- Isopropanol (< 0.48%)
- Nitrogen N
2
- Carton Monoxide CO (< 100 ppm)
- Nitrous Oxide NO (< 200 ppm)
- Freon R134A (< 1%) (for CO
2
, O
2
and N
2
O)
- Water vapor
Effects of a non-disturbing
gas to the measured gas
concentrations
•
CO
2
< 0.2 vol%
•
N
2
O < 2 vol%
•
O
2
< 2 vol%
•
Anesthetic agents < 0.15 vol%
Gas cross effects
•
Helium (50 vol%):
Decreases CO
2
(5 vol%) readings < 0.5 vol%
Decreases O
2
(50 vol%) readings < 2 vol%
•
Xenon (80 vol%):
Decreases CO
2
(5 vol%) readings < 0.5 vol%
Decreases O
2
(14 vol%) readings <1.5 vol%