Patients with mild, moderate or seere WD (on Willebrand disease), an inherited disease which affects about 1% of people, are susceptible to excessie bleeding during and after surgery.

• WD（冯维勒布兰德氏病）是一种遗传性疾病，有1%25的人患有此病，轻、中度或重度患者在手术中以及手术后易发生大出血。