Table 1 Carrier gas effect.
From: Can modern infrared analyzers replace gas chromatography to measure anesthetic vapor concentrations?
O2 | CO2 | N2O | N2O+CO2 | ||||||
|---|---|---|---|---|---|---|---|---|---|
Agent | Analyzer # | GC | IR | GC | IR | GC | IR | GC | IR |
isoflurane | I | 1.24 | 1.20 | 1.18 | 1.15 | 1.19 | 1.15 | 1.22 | 1.20 |
II | 1.05 | 1.07 | 0.97 | 1.01 | 1.08 | 1.10 | 1.18 | 1.22 | |
III | 0.95 | 0.95 | 0.88 | 0.86 | 1.24 | 1.30 | 1.11 | 1.12 | |
IV | 1.20 | 1.17 | 0.85 | 0.81 | 1.14 | 1.06 | 1.08 | 1.00 | |
sevoflurane | I | 1.90 | 1.88 | 1.96 | 1.90 | 0.91 | 0.93 | 0.88 | 0.88 |
II | 2.01 | 1.80 | 1.08 | 0.99 | 1.05 | 0.98 | 0.98 | 0.89 | |
III | 1.71 | 1.67 | 1.82 | 1.80 | 0.95 | 0.91 | 1.03 | 1.00 | |
IV | 1.80 | 1.64 | 1.80 | 1.64 | 1.05 | 0.98 | 0.84 | 0.77 | |
desflurane | I | 6.14 | 5.90 | 5.00 | 5.00 | 5.95 | 6.03 | 5.71 | 5.40 |
II | 5.88 | 5.64 | 5.38 | 5.27 | 5.86 | 5.56 | 5.48 | 5.37 | |
III | 4.76 | 4.80 | 6.12 | 5.96 | 6.76 | 6.47 | 6.02 | 5.54 | |
IV | 5.75 | 5.31 | 5.29 | 5.00 | 5.85 | 5.40 | 5.65 | 5.30 | |