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Table 8 Ventral Hernia Working Group assessment of incisional ventral hernias for risk of surgical site occurrences: definitions of grades

From: Delayed primary closure of contaminated abdominal wall defects with non-crosslinked porcine acellular dermal matrix compared with conventional staged repair: a retrospective study

Grade 1

Grade 2

Grade 3

Grade 4

Low risk of surgical-site occurrences


High risk of surgical-site occurrences

No comorbidities

Patient has comorbidities, for example, smoker, obese, diabetic, immunosuppressed, chronic obstructive pulmonary disease

Wounds that are potentially contaminated due to a previous wound infection, presence of a stoma, or violation of the gastrointestinal tract

Wounds with active infection, such as septic dehiscence or the presence of an infected synthetic mesh

No history of wound infection

No evidence of wound contamination or active infection

No evidence of contamination

  1. Adapted with permission from Surgery, 148, Breuing K, Butler CE, Ferzoco S, et al. Incisional ventral hernias: review of the literature and recommendations regarding the grading and technique of repair, 544–558, ©2010 [13].