Acid-Base Disorders - Differential Diagnosis Algorithm

Acidemia (pH < 7.35)

 • Metabolic Acidosis (HCO3 < 24mmol/L) CO2 : HCO3 12:10

 • Respiratory Acidosis (pCO2 > 40 mmHg)

Alkalemia (pH > 7.45)

 • Metabolic Alkalosis (HCO3 > 28mmol/L) CO2: HCO3 7:10

 • Respiratory Alkalosis (pCO2 < 35 mmHg)



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