A 1-year old female spayed Doberman Pinscher has presented after being hit by a car. Initial chest radiographs show mild contusions, and the patient appears to be otherwise stable. A right mid-shaft long oblique femoral fracture has been identified. Routine pre-operative blood work is unremarkable. A buccal mucosal bleeding test (BMBT) is elevated at 6 minutes. What will you administer prior to surgery? 一只1岁的雌性已绝育杜宾犬由于被车撞了之后前来就诊。初始的胸腔X光片提示轻微挫伤，但除此之外这只动物其它都很稳定。还发现其有股骨中段斜骨折。常规术前血检无明显异常。但其颊黏膜出血时间为6分钟。你会在术前使用什么药物？