单纯作浅静脉高位结扎术的指征应是() ["A．深静脉瓣膜功能失常","B．浅静脉瓣膜功能不全，交通支瓣膜功能不全","C．浅静脉瓣膜功能不全，深静脉瓣膜功能正常","D．试验交通支瓣膜功能正常","E．深浅静脉瓣膜功能均失常"]
深静脉血栓形成静脉造影的X线表现有() ["A．深静脉主干部分或全部不显影","B．静脉管腔不规则狭窄，部分扩张甚至扭曲","C．造影剂在深静脉主干某一平面突然中断","D．主干静脉内造影剂充盈缺损，可出现“轨道征”","E．常无侧支静脉显影"]
对草酸盐抗凝剂，错误的叙述是() ["A．草酸铵可使血细胞膨胀","B．可用于凝血检查","C．对Ⅴ因子保护差","D．草酸盐可用于血细胞比容测定","E．可干扰血浆中钾，钠和氯的测定"]
盆腔手术后患者，卧床第8天下床，觉左小腿后方疼痛，足部、踝部有水肿，用手压迫小腿肌肉两侧是将足部向背侧屈曲时，引起腓肠肌疼痛，应考虑() ["A．大隐静脉血栓性静脉炎","B．血栓性闭塞性脉管炎","C．髂静脉血栓形成","D．小腿肌肉的静脉血栓形成","E．下肢静脉，动脉反应性痉挛"]
枸橼酸钠用于血沉检查，抗凝剂与血液的比例是() ["A．1:2","B．1:8","C．1:6","D．1:4","E．1:9"]
背景：
