What is the primary chemical event in respiratory acidosis?
a. Decrease in blood CO2 levels
b. Decrease in blood HCO3– levels
c. Increase in blood CO2 levels
d. Increase in blood HCO3– levels
ANS: C
A high PaCO2 increases dissolved CO2, lowering the pH:
pH HCO3–/PaCO2
where means decreased, means no change, and means increased. Respiratory disturbances caus-ing acidemia are called respiratory acidosis.
Health Professions
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