Anion gap
An anion gap blood test gives a measurement of the acid-base balance (pH balance) in your blood. This lets you know whether your blood is too acidic or not acidic enough. The test also checks for an electrolyte imbalance in your blood. To do the measurement, an anion gap test uses the results of an electrolyte panel or other blood tests that measure your electrolytes.
The anion gap blood test shows whether your electrolytes are out of balance or if your blood is too acidic or not acidic enough. Too much acid in the blood is called acidosis . Too little acid in your blood is called alkalosis . Both conditions can be serious.
Source: MedlinePlus, U.S. National Library of MedicineNormal range
2 published ranges, each from a named source 713 mEq/L drawn: all ages · American Board of Internal Medicine (Laboratory Test Reference Ranges)
- Normal
- 7–13 mEq/L
All source ranges (2)
| Source | Sex | Age | Range |
|---|---|---|---|
| American Board of Internal Medicine (Laboratory Test Reference Ranges) | All | all ages | 7–13 mEq/L |
| Mayo Clinic Laboratories (Test Catalog) | Female | 7 y+ | 7–15 |
What an abnormal result can be associated with
- A high result
- Elevated serum anion gap
- A low result
- Decreased serum anion gap
details
- Sample
- Serum or plasma · LOINC
- Part of
- Electrolytes panel
- Listed under
- Fluid and Electrolyte Balance
- Code
- LOINC 33037-3 · mEq/L
- Also known as
- Anion gap, Ag, Calc
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