Winter's formula (expected PaCO₂)
Checks respiratory compensation in metabolic acidosis.
Inputs
0 of 1mEq/L
Optional
When to use
- Metabolic acidosis on a blood gas.
Pearls and pitfalls
- Measured PaCO₂ above the range means a concurrent respiratory acidosis; below means respiratory alkalosis.
Why use
Flags a hidden second disorder.
- where
- PaCO2
- Expected arterial CO₂, mmHg
- HCO3
- Serum bicarbonate, mEq/L