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Test Findings
 
 

Hypercapnia

 
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Hypercapnia

  • An increased PaCO₂ of greater than 44 mmHg on an arterial blood gas suggests the presence of a respiratory process - either primary (respiratory acidosis) or secondary (respiratory compensation of metabolic alkalosis).
    • Interpretation

    • Reduced pH with elevated PCO - suggests respiratory acidosis
    • Elevated pH with elevated PCO and elevated HCO₃ - suggests respiratory compensation for metabolic alkalosis
    • Normal pH with elevated PCO and elevated HCO₃ - suggests mixed respiratory acidosis-metabolic alkalosis
 
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