A 40 years old male develops excessive hyperven-tilation. A G reveals pH- 7.5 pCO2 24 mm Hg PO2 88 mm of Hg. True statement is -

First step Determine whether it is acidosis or alkalosis Increased pH indicates alkalosis Second step Inspect HCO3-/CO2 to determine the cause of alkalosis or acidosis. pCO2 → 24 mm Hg (decreased) The alteration in CO2 is in sync. with the alteration in the pH, so the alkalosis can be attributed to a decrease in pCO2. Thus, it is a case of respiratory alkalosis.