[目的]探讨B超引导下水压灌肠治疗小儿急性肠套叠的方法及影响复位成功的相关因素。[方法]回顾性分析2008年4月～2010年4月收治的54例急性肠套叠的患儿的临床资料,该组患儿均经B超或手术确诊,其中41例在B超引导下水压灌肠复位治疗,将该组患儿按性别、年龄、入院时有无轮状病毒感染史、入院时一般情况、发病时间、白细胞总数、B超影像学上的套叠包块血流信号多少探讨与复位成功率之间的关系。[结果]41例患儿全部治愈,无死亡病例,复位成功率为95.1%(39/41),无1例发生穿孔,经分析与复位成功率相关的因素有:年龄、发病时间、肠套叠类型及套叠处肠管血运。[结论]B超对小儿急性肠套叠的诊断率较高,有手术指征的患儿要尽早采取B超引导下水压灌肠治疗。 [Objective] To investigate the method of B-guided hydrostatic enema in children with acute intussusception and related factors that affect the success of reduction. [Methods] The clinical data of 54 children with acute intussusception admitted from April 2008 to April 2010 were retrospectively analyzed. All of the children were diagnosed by B-mode ultrasonography or surgery. Among them, 41 cases under the guidance of B-ultrasound Hydrodynamic enema reduction treatment, the group of children by sex, age, history of rotavirus infection at admission, the general situation on admission, the onset time, the total number of white blood cells, B-ultrasound image of the hematoma signal of the intussusception How much to explore the relationship between the success rate and reset. [Results] All 41 cases were cured and no deaths were found. The success rate of the resection was 95.1% (39/41). There was no perforation in 1 case. The factors related to the successful rate of reduction were age, onset time, intussusception Stack type and overlying the Department of intestine blood supply. [Conclusion] The diagnostic rate of B-ultrasound in pediatric acute intussusception is high. Children with operation indications should be treated with B-guided hydrostatic enema as soon as possible.