Table 4.
Changes in SpO2trachea and SvO2blood in hemorrhagic shock status
| Time | n | Oxygen saturation (%) | |
| SpO2trachea | SvO2blood | ||
| Pre-shock period | 20 | 74.6 ± 4.5 (62–78) | 74.3 ± 4.7 (62.6–76.8) |
| Immediately after onset of shock | 20 | 74.2 ± 4.3 (60–78) | 74.8 ± 4.6 (61.9–77.2) |
| 15 min after shock | 20 | 61.2 ± 4.8 (52–67) | 61.7 ± 4.3 (52.4–68.2) |
| 30 min after shock | 20 | 42.2 ± 4.6 (41–54) | 42.8 ± 4.7 (41.3–55.9) |
| 15 min after resuscitation | 20 | 51.8 ± 4.6 (49–63) | 51.3 ± 4.4 (49.5–62.6) |
| 30 min after resuscitation | 20 | 64.5 ± 6.8 (57–77) | 64.2 ± 6.3 (57.9–77.2) |
| 60 min after resuscitation | 20 | 74.2 ± 4.2 (61–77) | 74.4 ± 4.3 (61.2–77.6) |
Values are means ± SEM (range). SpO2trachea, mixed venous oxygen saturation measured through the left main bronchus; SvO2blood, oxygen saturation from pulmonary artery samples.