🧪 Delta Gap / Delta–Delta
UseWhen to use: high AG metabolic acidosis workups with Na, Cl, HCO₃.
StrataΔ/Δ≈22–26 pure HAGMA; lower +NAGMA; higher +metabolic alkalosis cue.
LimitsWhen not to use: without albumin context when severely hypoalbuminemi… · Pitfall: wrong normal AG for analyzer. · Integrate ABG/clinical picture.
SourceStandard delta-gap acid–base teaching
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
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Methodology · worked example, guidelines & full notes
AG + Δ/Δ.
When to use
When to use: high AG metabolic acidosis workups with Na, Cl, HCO₃.
How it works
AG=Na−(Cl+HCO₃); Δgap=AG−normal; Δ/Δ=Δgap+HCO₃.
Key points
- AG + Δ/Δ.
- Mixed-disorder cue.
- Next: etiology workup.
References
- Standard delta-gap acid–base teaching
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Sodium | 140 mmol/L |
|---|---|
| Chloride | 100 mmol/L |
| Bicarbonate | 12 mmol/L |
| Normal AG reference | 10 |
→AG28.0mmol/L
- Delta gap：18.0
- Delta–delta：30.0
- Cue：Δ/Δ high — HAGMA + metabolic alkalosis cue (or over-corrected)
Verification & sources · governance
FAQ
Frequently asked questions
- Does Delta Gap / Delta–Delta upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is Delta Gap / Delta–Delta calculated in practice? Can you show a worked example?
- Inputs: Sodium 140 mmol/L, Chloride 100 mmol/L, Bicarbonate 12 mmol/L, Normal AG reference 10 → Result: AG 28.0 mmol/L（Delta gap: 18.0, Delta–delta: 30.0, Cue: Δ/Δ high — HAGMA + metabolic alkalosis cue (or over-corrected)）