Criteria for deep surgical incisional (DSI) infection – all of the following:
(1) one of the following:
(1a) onset <= 30 days after the surgical procedure if no implant placed
(1b) onset <= 1 year after the surgical procedure if implant present
(2) involves deep soft tissue (fascia and muscle layers)
(3) one or more of the following:
(3a) purulent drainage from deep incision but not from organ or space component
(3b) diagnosis of deep incisional surgical site infection made by a physician
(3c) abscess or other sign of infection in deep incision seen at surgery
(3d) abscess or other sign of infection in deep incision seen by imaging studies or histopathologic exam
(3e) all of the following
(3e1) one or more of the following: fever> 38°C, localized pain, or localized tenderness
(3e2) deep incision deliberately opened by the surgeon OR dehisces spontaneously
(3e3) culture positive or not done (NOT negative culture)
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Subclassification
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Features
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deep incisional primary (DIP)
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infection in the primary (key) incision for an operation
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deep incisional secondary (DIS)
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infection in a secondary incision when > 1 incision is made
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An infection that involves both superficial and deep incision sites is classified as a deep incisional SSI.
