Initial blood analysis, osmolar gap, breathalyser results and doses of sodium bicarbonate administered to three patients with methanol poisoning
| Patient A (venous) | Patient B (arterial) | Patient C (arterial) | |
|---|---|---|---|
| pH | 6.58 | 6.75 | 6.77 |
| pCO2 (kPa) | 12.8 | 4.6 | 1.72 |
| pO2 (kPa) | 1.73 | 8.0 | 28.1 |
| SaO2 | 95% | 95% | 93% |
| SvO2 | 84% | 61% | 30% |
| SaO2 to SvO2 | 0.88 | 0.64 | 0.32 |
| Base deficit | 29 | >30* | >30* |
| NaHCO3 (mmol/L) | 9.2 | 4.9 | 1.9 |
| Lactate (mmol/L) | 15.0 | 16.0 | 16.9 |
| Sodium (mmol/L) | 150 | 142 | 147 |
| Potassium (mmol/L) | 8.2 | 10.2 | 6.6 |
| Urea (g/dL) | 4.4 | 3.8 | 3.8 |
| Glucose (mmol/L) | 9.8 | 12 | 18.2 |
| Calculated osmolarity | 330.6 | 320.2 | 329.2 |
| Serum osmolality | 486 | 401 | 408 |
| Osmolar gap | 155.4 | 80.8 | 78.8 |
| Breathalyser | Positive | Positive | Positive |
| NaHCO3 administered in the first 24 h | 8×50 ml vials 8.4% and 1.5 L 1.26% NaHCO3 | 7×50 ml vials 8.4% and 1.5 L 1.26% NaHCO3 | 14×50 ml vials 8.4% and 1.5 L 1.26% NaHCO3 |
*30 is the upper limit of the iSTAT machine.