surgical site infection organ/space surgical site infection A surgical site infection that involves any part of the body deeper than the fascial/muscle layers, that was handled during the surgery and occurs within a specified period of time. American College of Surgions TCOT. National Trauma Data Standard Data Dictionary [Internet]. 2024. https://www.facs.org/media/k4wnvapp/final_2024-data-dictionary-830.pdf Emma Chappell https://www.hopkinsmedicine.org/health/conditions-and-diseases/surgical-site-infections#:~:text=Deep%20incisional%20SSI.,was%20involved%20in%20the%20surgery.