Respiratory acidosis classification
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Vamsikrishna Gunnam M.B.B.S [2]
Overview
Respiratory acidosis is a clinical condition that occurs when the lungs are not able to remove enough of the carbon dioxide (CO2) produced by the body.Respiratory acidosis may be classified into two groups: Acute respiratory acidosis and Chronic respiratory acidosis.
Classification
Acute respiratory acidosis
- The PaCO2 is elevated above the upper limit of the reference range (over 6.3 kPa or 47 mm Hg)
- Accompanied with acidemia (pH <7.35)
Chronic respiratory acidosis
- The PaCO2 is elevated above the upper limit of the reference range
- Accompanied with a normal blood pH (7.35 to 7.45) or near-normal pH secondary to renal compensation and an elevated serum bicarbonate (HCO3- >30 mm Hg).