Internal Medicine · Emergency Medicine · Nephrology
Anion Gap Delta (ΔAG) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Allowed range: 100–180 mmol/L
Allowed range: 70–140 mmol/L
Allowed range: 1–45 mmol/L
Allowed range: 6–16 mmol/L
Reference anion gap used for delta calculation; 12 mEq/L is the conventional normal value.
Result
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Clinical inputs
- Serum sodium (mmol/L)Accepted range: 100 to 180
- Serum chloride (mmol/L)Accepted range: 70 to 140
- Serum bicarbonate (mmol/L)Accepted range: 1 to 45
- Reference anion gap (mmol/L)Accepted range: 6 to 16
Primary source
Wrenn K. The delta (Δ) gap: an approach to mixed acid-base disorders. Ann Emerg Med. 1990;19:1310-1313. DOI: 10.1016/S0196-0644(05)82292-9. PMID: 2240729. Scope: excess/delta anion gap (ΔAG) = measured AG − reference AG, where AG = sodium − (chloride + bicarbonate); used as the AG-rise term in mixed acid-base analysis. (1990)
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