Although most surgical and invasive procedures can be performed safely in patients with haemophilia, the optimal level and duration of replacement therapy required to prevent bleeding complications have not been established conclusively. For providing more insight into optimal therapy during invasive procedures, a literature review of surgical procedures in patients with haemophilia was conducted. Concomitantly, current practice was surveyed in 26 European Haemophilia Comprehensive Care Centres, representing 15 different countries. The review identified 110 original papers published between 1965 and 2007. Of these, only two studies were randomized controlled trials. Target levels and the duration of replacement therapy in the published studies were as follows. For major orthopaedic surgery: preoperative targets were 80-90%; postoperative targets showed a high degree of variation, with trough levels ranging from 20% to 80%, duration 10-14 days; for liver biopsy, 70-100%, 1-7 days; tonsillectomy: 90-100%, 5-11 days; indwelling venous access device insertion: 100%, 3-10 days; circumcision: 50-60%, 2-4 days; dental surgery: 30-50%, single treatment. With the exception of dental surgery, current practice in Europe, as assessed by the survey, was largely in agreement with published data. In conclusion, this study provides both a comprehensive review and a large survey of replacement therapy in patients with haemophilia undergoing invasive procedures; these data have informed the consensus practical treatment recommendations made in this paper. This study highlights the need for better-designed studies in order to better define minimal haemostatic levels of replacement therapy and optimal treatment duration.
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