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Test Findings
 
 

Hypocapnia

 
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Overview

A reduced PaCO₂ of less than 36 mmHg on an arterial blood gas suggests the presence of a respiratory process - either primary (respiratory alkalosis) or secondary (respiratory compensation of metabolic acidosis).
  • Interpretation

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