What is the pH value indicative of metabolic alkalosis?

The pH value indicative of metabolic alkalosis is greater than 7.45. The normal pH range for human blood is typically between 7.35 and 7.45. When the pH exceeds 7.45, it indicates that the blood is more alkaline than normal, which is characteristic of metabolic alkalosis.

In metabolic alkalosis, there is an increase in bicarbonate levels or a loss of hydrogen ions, leading to a shift in the acid-base balance towards alkalinity. This condition may arise from various factors such as vomiting, diuretic use, or hormonal disorders that promote excess bicarbonate retention or acid loss.

It’s important to remember the physiological significance of pH levels. A pH less than 7.35 represents acidemia, which is not compatible with metabolic alkalosis, while values between 7.35 and 7.45 fall within the normal range. Finally, a pH value that is exactly at 7.50 indicates a specific level of alkalosis, but it is the range above 7.45 that aligns with the broader classification of metabolic alkalosis. Thus, identifying a pH greater than 7.45 allows for the recognition of the alkalotic state.