[Perioperative Assessment and Management of Hypercoagulability and Thrombophilia in Microsurgery: Consensus Report of the German-Speaking Society for Reconstructive Microsurgery (GSRM)].

Uninterrupted blood flow through microsurgically anastomosed vessels is crucial for the postoperative success of reconstructive microsurgery. Contrary to the highly standardized anastomosis techniques, the pivotal partner discipline of evidence-based microsurgical haemostaseology and haemorrheology is still in its infancy. Prospective clinical studies yielding evidence-based recommendations are notably lacking. Currently, perioperative management in microsurgery is based solely on site-specific empirical experience. The collective aim of these diverse efforts is the preoperative identification of increased coagulation (hypercoagulability) or clotting activities (thrombophilia) and the development of relevant anticoagulation strategies. During the 43rd Annual Meeting of the German-Speaking Working Group for Microsurgery (DAM) in November 2022 in Frankfurt, experts in microsurgery, haemostaseology, and anaesthesia deliberated on the fundamentals of coagulation and physiology. Also, alongside a literature review, consensus recommendations for the perioperative management of hypercoagulopathies were established. Subsequently, methodologies were assessed within the panel, criteria for decision-making were gathered, and, ultimately, a consensus recommendation by DAM regarding a perioperative algorithm was devised, which is detailed in this position paper.