In this article, there are given data of 1523 case histories for detection of postoperative infectious complications. Among them 653 cases were hip replacement surgeries and 870 cases were osteosynthesis of long bones. All of these operations were performed in department of traumatology in 2010-2014 years. With use of descriptive epidemiological method of research, for both types of surgical interventions were detected: most often reasons and indications for surgical treatment, prevalence of patients gender and age, incidence of early and late (both deep and superficial) postoperative infectious complications of surgical site, and also forms and incidence of common inflammatory diseases and statistically significant risk factors of there appearance.