Which of the following values is always decreased with respiratory alkalosis (compensated or decompensated)?

Question

Quizplus · Accepted Answer

Respiratory alkalosis is characterized by a decrease in the PaCO₂ due to hyperventilation. This results in an increase in the pH of the serum, which can be compensated by bicarbonate reabsorption by the kidneys. However, serum bicarbonate levels may be decreased or normal depending on the degree and duration of compensation. Urine pH may also be decreased due to increased excretion of bicarbonate in the urine, but this is not always the case. Thus, the only value that is always decreased with respiratory alkalosis is PaCO₂.

Which of the Following Values Is Always Decreased with Respiratory