Why does hyperventilation cause respiratory alkalosis?

Nov 24, 2022 Source: Cainiu Health
Disease description:

I had some difficulty breathing, so I used supplemental oxygen at home, after which I experienced symptoms of fainting. After going to the hospital, the doctor diagnosed me with alkalosis. I would like to know why hyperventilation leads to respiratory alkalosis?

Doctor's answer (1)
Dr. Wang Mingxuan
Respiratory alkalosis caused by hyperventilation results from excessive elimination of carbon dioxide from the body, leading to a reduction in acidic substances. This condition is also known as respiratory alkalosis. Hyperventilation increases alveolar tidal volume, and this increased alveolar ventilation leads to excessive expulsion of carbon dioxide. As a result, the partial pressure of carbon dioxide in the body decreases, reducing acidity and causing symptoms of alkalosis.