TABLE 2.
BLOOD OXYGEN AFFINITY
| Exchange Blood
|
Blood after Exchange
|
Exchange
|
|||
|---|---|---|---|---|---|
| Group | P50 (mm Hg) | n | P50 (mm Hg) | n | % |
| E10 | 11.5 ± 0.5 | 1.38 ± 0.08 | 24.5 ± 0.8 | 2.08 ± 0.11 | 37.0% |
| E25 | 26.6 ± 0.4 | 1.59 ± 0.09 | 30.1 ± 0.6 | 2.16 ± 0.07 | 36.4% |
| E32 | 32.2 ± 0.3 | 2.88 ± 0.05 | 32.2 ± 0.2 | 2.88 ± 0.04 | — |
| E45 | 45.2 ± 0.6 | 2.70 ± 0.06 | 36.8 ± 0.3 | 2.72 ± 0.05 | 35.5% |
| E60 | 60.1 ± 0.5 | 2.32 ± 0.05 | 41.0 ± 0.4 | 2.49 ± 0.05 | 31.4% |
Definition of abbreviations: n, Hill coefficient; P50, half the binding sites saturated with oxygen.
The amount of modified Hb-O2 affinity red blood cells transfused was estimated by comparing the actual P50 of the circulating blood to the P50 of each of the cell populations, measured independently.