Table 1.
Time (s; mean ± 1 SD) until ataxia, full recumbency, or death due to various euthanasia methods
| 15% CO2 | 30% CO2 | 50% CO2 | 100% CO2 | Isoflurane | Pentobarbital– phenytoin | |
| Ataxia | 79.4 ± 13.4a,b | 49.6 ± 8.8a,b | 31.7 ± 5.3 | 24.7 ± 4.8 | 32.6 ± 13.0 | 35.6 ± 11.0 |
| Nose down | 106.3 ± 17.6a | 70.2 ± 6.0 | 45.5 ± 13.6b | 32.6 ± 5.5a,b | 61.9 ± 13.6 | 105.8 ± 51.3 |
| Death | 204.1 ± 29.0b | 160.3 ± 25.2a,b | 100.9 ± 17.1a,b | 70.6 ± 7.2a,b | 236.6 ± 35.0b | 343.3 ± 110.3a |
CO2 data have been published previously.2
a
Value significantly (P < 0.0001) different from that for isoflurane
b
Value significantly (P < 0.0001) different from that for pentobarbital–phenytoin