Diabetic foot classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Daniel A. Gerber, M.D. [2]

Overview

Diabetic foot infections are classified according to severity based upon

Classification

Diabetic foot infections are classified according to severity to assist with clinical decision making regarding need for oral or parenteral antibiotics, outpatient management or hospitalization, and surgical intervention. The Infectious Disease Society of America (IDSA) introduced a classification scheme for these infections in their 2004 guidelines, broadly categorizing mild, moderate, and severe infections based upon the extent of infection and inflammation.[1] The International Working Group on the Diabetic Foot (IWGDF) published a similar classification system in 2012.[2] These systems were externally validated in a longitudinal study to assess prognostic value, which demonstrated increased risk for amputation among patients with infections classified as severe.[3]

Clinical Manifestation PEDIS Grade IDSA Severity
No symptoms or signs of infection 1 Uninfected
Local infection involving only the skin and the subcutaneous tissue without involvement of deeper tissues and without signs of SIRS
  • If erythema, must be >0.5 cm to ≤2 cm around the ulcer.
  • Exclude other causes of an inflammatory response of the skin (eg, trauma, gout, acute Charcot neuro-osteoarthropathy, fracture, thrombosis, venous stasis).
2 Mild
Local infection with erythema >2 cm or involving structures deeper than skin and subcutaneous tissues (eg, abscess, osteomyelitis, septic arthritis, fasciitis) without signs of SIRS 3 Moderate
Local infection with the signs of SIRS, as manifested by ≥2 of the following:
  • Temperature >38 °C or <36 °C
  • Heart rate >90 beats/min
  • Respiratory rate >20 breaths/min or PaCO2 <32 mm Hg
  • White blood cell count >12,000 or <4,000 cells/μL or ≥10% immature (band) forms
4 Severe

References

  1. Lipsky BA, Berendt AR, Cornia PB, Pile JC, Peters EJ, Armstrong DG; et al. (2012). "2012 Infectious Diseases Society of America clinical practice guideline for the diagnosis and treatment of diabetic foot infections". Clin Infect Dis. 54 (12): e132–73. doi:10.1093/cid/cis346. PMID 22619242.
  2. Lipsky BA, Peters EJ, Senneville E, Berendt AR, Embil JM, Lavery LA, Urbancic-Rovan V, Jeffcoate WJ (2012). "Expert opinion on the management of infections in the diabetic foot". Diabetes Metab Res Rev. 28 (1): 163–78. PMID 22271739.
  3. Lavery LA, Armstrong DG, Murdoch DP, Peters EJ, Lipsky BA (2007). "Validation of the Infectious Diseases Society of America's diabetic foot infection classification system". Clin Infect Dis. 44 (4): 562–5. PMID 17243061.


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