[Pneumonia in patients after extracorporeal circulation].

Hospital infections are still an important problem of to-days medicine. The most common and dangerous one is pneumonia. The purpose of this study was to determine the cause of pneumonia in patients operated on under extracorporeal circulation. It was proved that micro-organisms responsible for pneumonia in our patients were Pseudomonas sp. and Staphylococcus aureus. No correlation between the bacterial flora cultured from the air in operating theatre and post-op. ward and bacterial flora responsible for pneumonia was found. It can be infer that pulmonary infections were rather caused by hospital cross-infections or endogenic infections in colonized patients.