The American Association for the Surgery of Trauma (AAST) reported criteria for the grading of a Surgical Site Infection (SSI).
Patient selection: surgical site infection with objective evidence of infection
(1) location of the infection
(2) clinical findings
limited to skin at incision site only
erythema and swelling without wound separation
involvement of subcutaneous tissue
phlegmon or abscess in subcutaneous tissue
involvement of fascia and/or muscle layer
phlegmon or abscess in muscle or fascia
involvement of body cavity or tissue involved by the surgery
phlegmon or abscess deep to muscle or fascia at the operative site OR fascial wound dehiscence
involvement of a site not involved by the surgery
phlegmon or abscess away from the operative site
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Specialty: Infectious Diseases, Surgery, general