What is the typical pH range indicating metabolic acidosis on an arterial blood gas (ABG) test?

The correct answer indicates that a typical pH range reflecting metabolic acidosis on an arterial blood gas (ABG) test falls outside the normal physiological range of pH, which is typically between 7.35 and 7.45. In the context of metabolic acidosis, the pH is usually lower than this normal range.

In metabolic acidosis, a decrease in the blood's pH can occur due to a variety of factors, such as an accumulation of acid in the body or a loss of bicarbonate. A pH value of 7.35 or lower is commonly associated with this condition, demonstrating that the blood is more acidic than normal. Therefore, recognizing the significance of a pH value that dips towards or below 7.35 is crucial for identifying metabolic acidosis.

The other options present ranges that do not reflect the typical pH associated with metabolic acidosis. For example, a pH range of 7.45 to 7.70 suggests an alkalotic state rather than acidosis, while ranges like 7.70 to 7.80 exceed typical physiological limits, indicating a more serious or rare condition. A range of 7.30 to 7.40 is closer to normal but still does