Clinical Correlates of pH Levels
Problem Set
Problem 9: Hyperventilation
A 19-year-old male presents to the emergency room with the following blood gases:
| Patient's Value | Normal Value |
|
| pH | 7.55 | 7.35-7.45 |
| pCO2 | 25 mm Hg | 35-45 mm Hg |
| [HCO3-] | 22 mmol/liter | 24-28 mmol/liter |
His companions report that he was "trying to set the world record for holding his breath underwater", but had fainted after hyperventilating for 15 minutes.
What condition does this patient appear to have?
A. uncompensated respiratory alkalosis B. uncompensated metabolic alkalosis C. partially compensated respiratory alkalosis D. partially compensated metabolic alkalosis
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The University of Arizona
January 19, 1999
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