Dermatology Book

Viral Infection

Bacterial Infections

  • Laboratory Risk Indicator for Necrotizing Fasciitis

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Laboratory Risk Indicator for Necrotizing Fasciitis

Aka: Laboratory Risk Indicator for Necrotizing Fasciitis, LRINEC Score
  1. See Also
    1. Necrotizing Fasciitis
  2. Indications
    1. Cellulitis (or other Skin and Soft Tissue Infection)
      1. Identify Necrotizing Fasciitis
  3. Criteria (0 to 13 points total)
    1. C-Reactive Protein (C-RP)
      1. Score 0: C-RP <150 mg/L
      2. Score 4: C-RP >=150 mg/L
    2. Serum Creatinine
      1. Score 0: Creatinine <=1.6 mg/dl
      2. Score 2: Creatinine >1.6 mg/dl
    3. Blood Glucose
      1. Score 0: Glucose <=180 mg/dl
      2. Score 1: Glucose >180 mg/dl
    4. Hemoglobin (Hgb)
      1. Score 0: Hgb >13.5 g/dl
      2. Score 1: Hgb 11 to 13.5 g/dl
      3. Score 2: Hgb <11 g/dl
    5. Serum Sodium (sNa)
      1. Score 0: Sodium >= 135 mEq/L
      2. Score 2: Sodium < 135 mEq/L
    6. White Blood Cell Count (total WBC)
      1. Score 0: WBC <15,000/mm3
      2. Score 1: WBC 15,000 to 25,000/mm3
      3. Score 2: WBC >25,000/mm3
  4. Interpretation
    1. Total Score >6
      1. Consistent with Necrotizing Fasciitis
    2. Total Score >8
      1. Highly predictive of Necrotizing Fasciitis
  5. References
    1. Wong (2004) Crit Care Med 32(7): 1535-41 +PMID:15241098 [PubMed]

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