teacher： The prevention of complications in intravenous therapy is very important . The complications are . local and systemic infection ， infiltration， tisue damage， phlebitis， thrombosis， allergic reactions and circulatory overload.

　　Student： How do we prevent them？

　　T： It depends on the proper handling of intravenous technique and rigid aseptic technique . And you should observe the signs and symptoms of above complications ， know the causes， record the patient's responses to IV infusion regularly， notify the doctor of serious changes； discontinue IV therapy if judgment warrants.

　　老师：在静脉输液治疗中预防并发症是很重要的。这些并发症包括：局部和全身感染，静脉周围浸润、组织损伤、静脉炎、血栓形成，过敏反应和循环负荷加重。

　　学生：我们怎么预防这些呢？

　　老师：这取决于正确的静脉注射操作规程和严格的无菌技术。应该注意观察上述并发症的体征和症状，并知道引起的原因，定时记录病人静脉输液反应，有严重变化时，报告医生；如果判断有根据，就中断输液。