无尿是指24小时尿量() ["<100ml","<200ml","<300ml","<400ml","<500ml"]
男性,60岁,因门静脉高压症行分流术,术后第3天,出现嗜睡、烦躁不安、黄疸、少尿等,应考虑()。 ["静脉血栓形成","膈下脓肿","肝性脑病","内出血","休克"]
梯度回波脉冲序列应使用() ["90°+180°",">90°射频脉冲","<90°射频脉冲","180°射频脉冲",">180°射频脉冲"]
半自动血凝仪的主要特点是() ["手工加样加试剂","操作简便","应用检测方法少","测量精度低于手工","速度慢"]
门静脉高压上消化道出血合并肝昏迷,下列各项中最适用于消除肠内积血,减少氨形成的是()。 ["弱酸性液灌肠","生理盐水灌肠","弱碱性液灌肠","肥皂水灌肠","50%硫酸镁口服"]
病因与危险因素研究的主要方法有()、()、()、()。