Background: The guideline for postoperative pain management therapy recommends several obligate measures and permissive provisions keeping catheters hygienic. An organized Pain Nurse is generally regarded as convenient. But some recommendations are still discussed. The guideline is based on only few large studies and the number of catheter-related infections differs from technique and risk profile. However, all recommendations for improvement have to be compared with the guideline. This prospective study was initiated to investigate the influence of catheter fixing, the frequency of changing dressings and the use of bacterium-filters on the rate of inflammation and infection.
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