ISRCTN65599814 (http://www.clinical-trials.com).

There are no clear diagnostic criteria for incisional hernia available in the literature. Standardized combination of ultrasonography with physical examination during follow-up yields a significant number of, mostly asymptomatic, hernias, which would not be found using physical examination alone. This is especially relevant in research settings.

Incisional hernias occur in 1 of 3 temporary stoma wounds, and a body mass index of 30 or higher is a risk factor.