🦠 LRINEC Score (Necrotising Fasciitis)
Flag possible necrotising soft-tissue infection with the LRINEC score.
Clinical takeaway
A low score does NOT exclude necrotising fasciitis.
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When to use
Lab-based adjunct when necrotising fasciitis is considered.
How it works
CRP ≥ 150 (4); WBC 15–25 (1)/>25 (2); Hb 11–13.5 (1)/<11 (2); Na < 135 (2); Cr > 141 µmol/L (2); glucose > 10 (1). ≥ 6 suspicious, ≥ 8 high.
Key points
- A low score does NOT exclude necrotising fasciitis.
- Diagnosis remains clinical and surgical.
- Do not delay exploration for a reassuring score.
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.
| CRP | 200 mg/L |
|---|---|
| WBC | 18 ×10⁹/L |
| Haemoglobin | 12 g/dL |
| Sodium | 133 mmol/L |
| Creatinine | 150 µmol/L |
| Glucose | 11 mmol/L |
→LRINEC11/13
- Risk：≥ 8 — high risk
- Caution：A low score does NOT exclude necrotising fasciitis — it remains a clinical/surgical diagnosis.
Frequently asked questions
- What is LRINEC Score (Necrotising Fasciitis)?
- Flag possible necrotising soft-tissue infection with the LRINEC score.
- How is LRINEC Score (Necrotising Fasciitis) calculated? What is the core formula?
- CRP ≥ 150 (4); WBC 15–25 (1)/>25 (2); Hb 11–13.5 (1)/<11 (2); Na < 135 (2); Cr > 141 µmol/L (2); glucose > 10 (1). ≥ 6 suspicious, ≥ 8 high.
- When is LRINEC Score (Necrotising Fasciitis) used?
- Lab-based adjunct when necrotising fasciitis is considered.
- What are the key clinical points for LRINEC Score (Necrotising Fasciitis)?
- A low score does NOT exclude necrotising fasciitis. Diagnosis remains clinical and surgical. Do not delay exploration for a reassuring score.
- What are the limits and cautions when using LRINEC Score (Necrotising Fasciitis)?
- 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 LRINEC Score (Necrotising Fasciitis) calculated in practice? Can you show a worked example?
- Inputs: CRP 200 mg/L, WBC 18 ×10⁹/L, Haemoglobin 12 g/dL, Sodium 133 mmol/L, Creatinine 150 µmol/L, Glucose 11 mmol/L → Result: LRINEC 11 /13（Risk: ≥ 8 — high risk, Caution: A low score does NOT exclude necrotising fasciitis — it remains a clinical/surgical diagnosis.）