Table 1.
Group I (n=10) | Group II (n=7) | Group III (n=5) | Group IV (n=4) | |
---|---|---|---|---|
Anesthesia | Isoflurane | Isoflurane | Isoflurane | None |
FIO2 during experiment | 100% | Titrated to PAO2 of 100–115mmHg | Titrated to PAO2 of 100–115mmHg | 100% |
Pharmacologic Paralysis | None | None | Gallamine | None |
Mechanical Ventilation | None | At apnea | Throughout experiment | None |
1hour survival | 0/10 | 5/7 | 4/6 | 0/4 |
Functional Measurements | ETCO2, Vi, Ve, esophageal pressure, arterial pressure, pulse oximetry, PaO2, PaCO2 | ETCO2, Vi, Ve, esophageal pressure, arterial pressure, pulse oximetry, PaO2, PaCO2 | ETCO2, Vi, Ve, arterial pressure, pulse oximetry, PaO2, PaCO2 | ETCO2, Vi, Ve |
FIO2 - fraction of inspired oxygen
ETCO2 - end tidal carbon dioxide
Vi - volume of inspired gas
Ve – volume of expired gas
PaO2 – arterial partial pressure of oxygen
PaCO2 – arterial partial pressure of carbon dioxide