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Box 03-07

Here's a quick look at how to interpret ABG results:

  • Check the pH. Is it normal (7.35 to 7.45), acidotic (below 7.35), or alkalotic (above 7.45)?
  • Check PaCO2. Is it normal (35 to 45 mm Hg), low, or high?
  • Check the bicarbonate level. Is it normal (22 to 26 mEq/L), low, or high?
  • Check for signs of compensation. Which value (PaCO2 or bicarbonate) more closely corresponds to the change in pH?
  • Check PaO2 and SaO2. Is the PaO2 normal (80 to 100 mm Hg), low, or high? Is the SaO2 normal (95% to 100%), low, or high?