Test Findings
 

Alkalaemia

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Overview

  • A pH >7.45 is indicative of alkalaemia; this may be due to a primary metabolic or respiratory alkalosis.
    • Causes of Alkalaemia

    • Metabolic alkalosis - bicarbonate excess, GI acid loss, renal acid loss, compartmental shift
    • Respiratory alkalosis - hyperventilation
    • Interpretation

    • Elevated HCO₃ ± elevated PaCO₂ - suggests metabolic alkalosis
    • Reduced PaCO₂ ± reduced HCO₃ - suggests respiratory alkalosis
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