The investigators will analyze biomarkers related to the prognosis and treatment of
necrotizing soft tissue infections (NSTI). The focus will be on whether certain endothelial
and immune system biomarkers can function as markers of disease severity, mortality as well
as the effects of hyperbaric oxygen therapy (HBOT). Biomarkers will be measured upon
admission to an intensive care unit at Copenhagen University Hospital and during the
following 3 days.