Clinical Trial: Ten-year Practice of Labor Pain Control in China

Study Status: Completed
Recruit Status: Completed
Study Type: Observational

Official Title: A Ten-year Practice of Labor Pain Control in China

Brief Summary: Since 1999, labor pain control has being performed in China, and the initial time of analgesia is at the cervix >= 2 cm. Meanwhile, American Society of Obstetrics & Gynecology recommended that the labor analgesia with neuraxial block should be performed at the cervix >= 4 cm in 2002. After that, the threshold has been revised to at least >= 2 cm in 2006 by the Society. However, in China, the practice of labor analgesia with neuraxial block has being performed for over seven years. Up until now, the practice has being experienced during this ten-year period at the cervix around 1 cm. The investigators hypothesized that labor pain control in different stages had different characteristics and had different influence on patients short- and long-lasting outcomes. This study is mainly investigating different labor analgesia procedures in different stages since the initiation of the practice in 1999, and assessing their influence on the outcomes to display the trajectory of development of labor analgesia in China of which might fit to the the whole process of the study of labor analgesia throughout the world. All these were done by analyzing the data records since from January 1999 to December 2008.

Detailed Summary:
Sponsor: Nanjing Medical University

Current Primary Outcome: Rate of cesarean delivery [ Time Frame: Analgesia initiation to successful vaginal delivery ]

Original Primary Outcome: Same as current

Current Secondary Outcome:

  • Rate of instrument-assisted delivery [ Time Frame: Analgesia initiation to successful vaginal delivery ]
  • Indications of cesarean delivery [ Time Frame: Analgesia initiation to cesarean section ]
  • Maternal Visual Analog Scale (VAS) rating of pain [ Time Frame: Prior to analgesia, latent phrase, active phrase, second stage of labor, posterior to vaginal delivery ]
  • Duration of analgesia [ Time Frame: Initiation of analgesia to the disappearance of sensory block ]
  • Maternal satisfaction with analgesia [ Time Frame: At the end of the vaginal delivery ]
  • Maternal oral temperature [ Time Frame: Analgesia initiation to successful vaginal delivery ]
  • Use of oxytocin after analgesia [ Time Frame: After analgesia to vaginal delivery ]
  • Low back pain at 3 months after vaginal delivery [ Time Frame: At the third month after vaginal delivery ]
  • Breastfeeding success at 6 weeks after vaginal delivery [ Time Frame: At the sixth week after successful delivery ]
  • Neonatal one-minute Apgar scale [ Time Frame: At the first minute of baby was born ]
  • Neonatal five-minute Apgar scale [ Time Frame: At the fifth minute of baby was born ]
  • Incidence of maternal side effects [ Time Frame: Analgesia initiation to successful vaginal delivery ]
  • Umbilical-cord gases analysis [ Time Frame: At the time baby was born ]


Original Secondary Outcome: Same as current

Information By: Nanjing Medical University

Dates:
Date Received: October 20, 2008
Date Started: January 2009
Date Completion:
Last Updated: September 17, 2009
Last Verified: September 2009