Table 5.
Changes in oxygen extraction ratio and central venous saturation after blood transfusion in patients with HB ≥10 or <10 in patients grouped by increased and normal oxygen extraction ratio.
| Variable | Low HB HB <10 (n=75) |
P | 95% CI | High Hb HB ≥10 (n=28) |
P | CI | ||
|---|---|---|---|---|---|---|---|---|
| Increased group Pretransfusion O2ER >40% (n=20) | Normal group Pretransfusion O2ER <40% (n=55) | Increased group Pretransfusion O2ER >40% (n=8) | Normal group Pretransfusion O2ER <40% (n=20) | |||||
|
| ||||||||
| Change in ScvO2 Posttransfusion | 7.3 (0.4) | 0.6 (0.1) | .0001 | (6.1,7.3) | 9.2 (0.56) | 2.8 (0.7) | .0001 | (3.9,8.8) |
| Change in O2ER Posttransfusion | 8.5 (0.9) | 1.4 (0) | .0001 | (6.03,8.16) | 13.07 (2.6) | 0.3 (0.1) | .0001 | (9.6,15.9) |
Central venous oxygen saturation (ScvO2); Oxygen extraction ratio (O2ER). P values from unpaired t test for changes in values from the pretransfusion state.