From: Xenon consumption during general surgery: a retrospective observational study
All | ECO Mode | AUTO Mode | MANUAL Mode | p-value | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(n = 48) | (n = 11) | (n = 26 ) | (n = 11 ) | ||||||||||
Xenon wash-in phase: | |||||||||||||
Duration of wash-in (min) | 11.5 | ± | 2.7 | 13.7 | ± | 2.8 | 11.0 | ± | 1.7§ | 10.2 | ± | 3.2§§ | 0.002 |
Denitrogenation (min) | 9.3 | ± | 4.3 | 8.1 | ± | 4.7 | 9.6 | ± | 3.4 | 9.9 | ± | 5.8 | 0.556 |
Total xenon consumption (l) | 9.4 | ± | 2.1 | 8.6 | ± | 0.9 | 8.9 | ± | 0.9 | 11.1 | ± | 3.7*§§ | 0.005 |
Maintenance of anaesthesia: | |||||||||||||
Time of maintenance (min) | 115 | ± | 44 | 111 | ± | 30 | 113 | ± | 53 | 123 | ± | 30 | 0.781 |
Total xenon consumption (l) | 15.0 | ± | 11.1 | 9.9 | ± | 3.6 | 15.7 | ± | 11.9 | 18.5 | ± | 12.8 | 0.172 |
Mean xenon usage (l/hour) | 7.5 | ± | 3.6 | 5.2 | ± | 1.1 | 7.8 | ± | 2.6§ | 8.9 | ± | 6.0§ | 0.049 |
Mean FiO2 concentration (Vol%) | 34.6 | ± | 2.6 | 34.9 | ± | 1.4 | 33.8 | ± | 2.6 | 36.2 | ± | 2.7* | 0.029 |
Mean expiratory xenon concentration | 58.2 | ± | 3.0 | 55.9 | ± | 2.4 | 59.7 | ± | 2.7§§ | 57.0 | ± | 2.5* | 0.000 |
Overall xenon consumption: | |||||||||||||
Time of anaesthesia (min) | 142.8 | ± | 44.1 | 142.6 | ± | 32.4 | 135.0 | ± | 51.0 | 161.3 | ± | 32.4 | 0.258 |
Time of xenon application (min) | 126 | ± | 44 | 125 | ± | 32 | 124 | ± | 53 | 133 | ± | 30 | 0.842 |
Xenon usage 1st hour (l/min) | 0.268 | ± | 0.121 | 0.205 | ± | 0.030 | 0.263 | ± | 0.082 | 0.347 | ± | 0.202 § | 0.020 |
Xenon usage 2nd hour (l/min) | 0.128 | ± | 0.042 | 0.098 | ± | 0.030 | 0.143 | ± | 0.042§ | 0.115 | ± | 0.035 | 0.007 |
Xenon usage 3rd hour (l/min) | 0.098 | ± | 0.056 | 0.080 | ± | 0.043 | 0.112 | ± | 0.050§ | 0.085 | ± | 0.077 | 0.042 |
Mean xenon consumption (l/hour) | 11.9 | ± | 4.0 | 9.2 | ± | 1.9 | 12.5 | ± | 2.6 | 13.4 | ± | 6.7§ | 0.031 |
Total xenon consumption (l) | 24.4 | ± | 11.4 | 18.5 | ± | 3.7 | 24.7 | ± | 11.5 | 29.6 | ± | 14.3§ | 0.033 |