🧫 Mehran Score (Contrast-Induced Nephropathy)
Predict contrast-induced nephropathy risk after PCI with the Mehran score.
Clinical takeaway
Risk rises steeply across strata (≈7.5% to ≈57%).
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When to use
Identify patients needing renal protection around contrast procedures.
How it works
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.
Key points
- Risk rises steeply across strata (≈7.5% to ≈57%).
- Minimise contrast volume and ensure hydration.
- Hold nephrotoxins and monitor renal function.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
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.
Frequently asked 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.）