An anion gap test checks the levels of acid in your blood. Learn about the conditions that the test results can reveal, and what a high/low test result may indicate.

A low anion gap result on a blood test is often a technical error, though it can stem from a health issue. Here, learn what low and high anion gap results mean.

The plasma concentration of sodium ions normally exceeds the sum of the plasma concentrations of chloride and bicarbonate ions. Calculation of the resulting 'anion gap' can aid the diagnosis of ...