Mehran Score (Contrast-Induced Nephropathy) — free guideline decision tool
Predict contrast-induced nephropathy risk after PCI with the Mehran score.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
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No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
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.
| Hypotension | No |
|---|---|
| Intra-aortic balloon pump | No |
| Congestive heart failure | No |
| Age > 75 | No |
| Anaemia | No |
| Diabetes | No |
| Contrast volume | 200 mL |
| eGFR | ≥ 60 (0) |
→Mehran2
- Contrast points：2 (1 per 100 mL)
- CIN risk：Low (~7.5% CIN, ~0.04% dialysis)
- Prevention：Minimise contrast volume, ensure adequate hydration, hold nephrotoxins.
| Hypotension | Yes (+5) |
|---|---|
| Intra-aortic balloon pump | Yes (+5) |
| Congestive heart failure | Yes (+5) |
| Age > 75 | Yes (+4) |
| Anaemia | Yes (+3) |
| Diabetes | Yes (+3) |
| Contrast volume | 200 mL |
| eGFR | < 20 (6) |
→Mehran33
- Contrast points：2 (1 per 100 mL)
- CIN risk：Very high (~57%)
- Prevention：Minimise contrast volume, ensure adequate hydration, hold nephrotoxins.
Common questions
What is Mehran Score (Contrast-Induced Nephropathy)?
Predict contrast-induced nephropathy risk after PCI with the Mehran score.
How is Mehran Score (Contrast-Induced Nephropathy) calculated? What is the core formula?
Hypotension 5, IABP 5, CHF 5, age > 75 4, anaemia 3, diabetes 3, contrast 1/100 mL, eGFR 40–60 (2)/20–40 (4)/<20 (6). ≤5 low to ≥16 very high.
When is Mehran Score (Contrast-Induced Nephropathy) used?
Identify patients needing renal protection around contrast procedures.
What are the key clinical points for Mehran Score (Contrast-Induced Nephropathy)?
Risk rises steeply across strata (≈7.5% to ≈57%). Minimise contrast volume and ensure hydration. Hold nephrotoxins and monitor renal function.
What are the limits and cautions when using Mehran Score (Contrast-Induced Nephropathy)?
For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
How is Mehran Score (Contrast-Induced Nephropathy) calculated in practice? Can you show a worked example?
Inputs: Hypotension No, Intra-aortic balloon pump No, Congestive heart failure No, Age > 75 No, Anaemia No, Diabetes No, Contrast volume 200 mL, eGFR ≥ 60 (0) → Result: Mehran 2（Contrast points: 2 (1 per 100 mL), CIN risk: Low (~7.5% CIN, ~0.04% dialysis), Prevention: Minimise contrast volume, ensure adequate hydration, hold nephrotoxins.） Inputs: Hypotension Yes (+5), Intra-aortic balloon pump Yes (+5), Congestive heart failure Yes (+5), Age > 75 Yes (+4), Anaemia Yes (+3), Diabetes Yes (+3), Contrast volume 200 mL, eGFR < 20 (6) → Result: Mehran 33（Contrast points: 2 (1 per 100 mL), CIN risk: Very high (~57%), Prevention: Minimise contrast volume, ensure adequate hydration, hold nephrotoxins.）
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Predict contrast-induced nephropathy risk after PCI with the Mehran score.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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