Table 1.
Sample | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
---|---|---|---|---|---|---|---|
Gas | O2 | CO | N2 | Air | N2 | Mix* | Air |
Temp (°C) | 25 | 25 | 25 | 25 | 37 | 37 | 37 |
Hematocrit (%) | 38 | 36 | 39 | 38 | 38 | 45 | 34 |
pH | 7.66 | 7.58 | 7.94 | 7.63 | 7.72 | 7.41 | 7.43 |
pH corr.** | 7.86 | 7.77 | 7.94 | 7.63 | 7.72 | 7.41 | 7.43 |
pCO2 (kPa) | 1.48 | 1.94 | 1.05 | 3.07 | 1.15 | 4.45 | 3.06 |
pCO2 corr.** (kPa) | 0.83 | 1.09 | 0.59 | 1.72 | 1.15 | 4.45 | 3.06 |
pO2 (kPa) | 71.0 | – | 1.95 | 5.88 | 3.15 | 6.84 | 10.84 |
pO2 corr.** (kPa) | 70.7 | – | 0.95 | 5.06 | 3.15 | 6.84 | 10.84 |
sO2 (%) | 100 | – | 39.8 | 83.1 | 67.2 | 86.2 | 96.3 |
sO2 (%) corr.** | 100 | – | 64.4 | 98.1 | 67.2 | 86.2 | 96.3 |
, mixture of 90% N2, 5% O2, and 5% CO2. ∗∗, blood gas analysis was performed at a sample temperature of 37°C throughout, whereas NMR measurements were performed at 25°C for samples 1–4. The corrections of pH, pCO2, pO2, and sO2 for these samples were calculated by using standard hemoglobin saturation curves versus temperature to obtain the corresponding values at 25°C (Materials and Methods).