Expected results, aims, priorities and significance of the project Study output will consist of data usable for design of recommended procedure for surgical patient care with severe peritonitis. Standardized protocol will be introduced for ICU patients which reflect only those laboratory methods and clinical parameters which clinically influence therapy. Detailed analysis for both groups will enable precise indication single surgical interventions which will ensure efficient and thus cost wise preferable therapy. Simple universal software will be created in terms of study which manages patient database and thus enables rapid concurrent assessment of health care quality.