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ABG Interpretation
 
 

Respiratory Alkalosis

 
 
 
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Overview

  • Primary Abnormality

  • Alkalaemia with decreased PaCOâ‚‚.
  • Secondary Response

  • Acute respiratory alkalosis - 2mmol/L [HCO₃] decrease for every 10mmHg PaCOâ‚‚ below 40mmHg
  • Chronic respiratory acidosis - 4mmol/L [HCO₃] decrease for every 10mmHg PaCOâ‚‚ below 40mmHg
  • Causes of Respiratory Alkalosis

  • Hyperventilation - hypoxia, anxiety, pain, intracranial pathology, pregnancy
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