Objective To study the "active"in the first stages of injection water sac indwelling catheter effects on labor. Methods Selecting maternal was from November 2013 to November 2014, all the first child, the pelvis was normal, no pregnancy complications, not intentional, liver and kidney diseases such as the history of the risk factors of pregnant women, randomly divided into experimental group and control group. Experimental group: in the first labor palace mouth open 3 cm, conventional injection water sac postoperative indwelling catheter to fetal childbirth. Control group: no indwelling catheter, after clinical, encourage pregnant women to urinate every 2-4 hours, urethral catheterization (refers to disposable urethral catheterization) when necessary. Results ① Statistically significant (P<0.05); ② Three stages of the comparison of total time, statistically significant (P<0.05); ③ Postpartum urinary tract infection, no statistical difference (P>0.05). Conclusion Through the "active" in the first stages of indwelling urethral catheterization is expected to contractions fatigue and abnormal fetal position into normal pregnant women , and strive to transvaginal natural childbirth, avoid unnecessary cesarean section, reducing the occurrence of the risk caused by surgical delivery from bad and long-term sequelae.%目的：探讨在第一产程活跃期注入水囊留置导尿对产程的影响。方法选取2013年11月至2014年11月在我院诊治的所有第一胎，骨盆正常，无妊娠合并症，无心、肝、肾等疾病史的高危因素的孕妇245名，分成试验组和对照组。试验组：在第一产程宫口开3 cm始，常规注入水囊留置导尿至胎儿娩出拔除。对照组：未行留置导尿，临床后，鼓励孕妇每2~4h排尿1次，必要时导尿（指的是一次性导尿）。结果①2组顺产率比较差异有统计学意义（P<0.05）；②2组3大产程总计时间的比较差异有统计学意义（P<0.05）；③2组产后泌尿系感染率比较差异无统计学意义（P>0.05）。结论通过在第一产程活跃期留置导尿有望将宫缩乏力及胎方位异常的孕妇转为正常，力争经阴道自然分娩，避免不必要的剖宫产术，减少因手术分娩致母婴不良风险的发生及远期后遗症。
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