Template:LRINEC SCORE

Laboratory Risk Indicator for Necrotizing Fasciitis (LRINEC) Score

Has not been prospectively validated, index of suspicion is key and 10% of the patients with a score < 6 had Necrotizing Fasciitis. A score > 6 has PPV of 92% and NPV of 96% for necrotizing fasciitis.

1. CRP (mg/L) ≥150: 4 points
2. WBC count (×10³/mm³)
   • <15: 0 points
   • 15–25: 1 point
   • >25: 2 points
3. Hemoglobin (g/dL)
   • >13.5: 0 points
   • 11–13.5: 1 point
   • <11: 2 points
4. Sodium (mmol/L) <135: 2 points
5. Creatinine (umol/L) >141: 2 points
6. Glucose >180 mg/dL (10 mmol/L): 1 point

Grouping by Scores

• Low Risk: score 5 (10% of pts with score < 6 still had nec fasc)
• Moderate Risk: score 6– 7
• High Risk: score >8

Proposed algorithm