Acute pancreatitis is a serious disease. Many clinical and laboratory prognostic scores for the severity of acute pancreatitis have been proposed over the years. The aim was to identify the biological factors of prognostic severity. The study was prospective, including a four-year period between 2007 and 2010. 103 patients were diagnosed with severe acute pancreatitis and treated in a surgical clinic in Bucharest. 58 were males, accounting for 56.31%, and 45 were women, 43.69% respectively. Numerous biochemical analyses of blood, especially the number of leukocytes, glucose, urea and bilirubin were monitored. They proposed generic profiles for patients with severe acute pancreatitis. Conclusions: There is no single biological prognostic factor, but a combination of different markers may contribute to a more precise prediction of severity, as confirmed by international literature.