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Oxygen saturation measurements in physiological states |
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| Intracuff pressure (cmH2O) |
n |
Oxygen saturation (%) |
|
|
|
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| SpO2trachea |
SvO2blood |
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|
|
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| 0 |
20 |
70.2 ± 6.2 (57–76) |
74.4 ± 4.3 (62.6–76.4) |
| 10 |
20 |
74.2 ± 4.7 (62–77) |
74.4 ± 4.4 (62.5–76.9) |
| 20 |
20 |
74.2 ± 4.8 (62–77) |
74.3 ± 4.3 (62.4–76.7) |
| 40 |
20 |
74.2 ± 4.6 (61–76) |
74.4 ± 4.3 (62.3–76.9) |
| 60 |
20 |
74.2 ± 4.6 (62–77) |
74.3 ± 4.4 (62.5–77.1) |
| Overall |
100 |
72.5 ± 6.8 (57–77) |
74.4 ± 6.3 (61.9–77.2) |
| Overall excluding 0 cmH2O |
80 |
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. | |||
Wang et al. Critical Care 2006 10:R7 doi:10.1186/cc3914 |
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