Acid-base

Winter's formula (expected PaCO₂ in metabolic acidosis)

Predicts PaCO₂ if respiratory compensation is appropriate. Mismatch = additional disturbance.

metabolic acidosiscompensation

Required inputs

  • HCO₃ (mEq/L)
  • Measured PaCO₂ (mmHg)

Equation or source

Albert MS. Ann Intern Med 1967;66:312.

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