关键词: 腰-硬联合阻滞, 硬膜外阻滞, 分娩镇痛, 子宫收缩持续时间, 子宫收缩间隔时间

Abstract:

Objective To investigate the impact of intrathecal labor analgesia on duration and interval of uterine contraction.MethodsIn this prospective study,60 parturients from Beijing Obstetrics and Gynecology Hospital who would like to have labor analgesia were randomized into two groups, one into spinal-epidural anesthesia group (group C) and the other into epidural anesthesia group (group E). The visual analogue scores (VAS) of pre-and post analgesia, rates of oxytocin use, the duration and interval time of uterus contraction were observed and recorded.Results 1) Compared to no analgesia, VAS scores were significantly reduced after analgesia in both groups. In this study,it was found that the onset of analgesia in the group C was significantly shorter than the group E (P<0.01). 2) The oxytocin usage increased after analgesia in each group (P<0.05). Oxytocin usage was similar after analgesia (P>0.05) in both groups. 3) After labor analgesia, duration of uterine contraction was shortened and interval of uterine contraction was extended within a short time. Duration of uterine contraction was shortened in the group C 5-30 min after analgesia (P< 0.05), duration of uterine contraction was shortened in the group E 10-30 min after analgesia (P<0.05). Interval of uterine contraction was extended in group C 15-30 min after analgesia (P<0.05). There was no significant difference after labor analgesia in group E in the interval of uterine contraction (P>0.05). Conclusion Combined spinal-epidural anesthesia and epidural anesthesia in labor analgesia can provide a good analgesic effect, but labor analgesia have a certain influence on uterine contraction. Duration of uterine contraction was shortened and interval of uterine contraction was extended within a short time, understanding of uterine contraction characteristics, and effective treatment contribute to the success of labor analgesia.

Key words: combined spinal-epidural anesthesia, epidural anesthesia, labor analgesia, duration of uterine contraction, interval of uterine contraction