• P Wiruchpongsanon.
• Department of Obstetrics and Gynecology, Taksin Hospital, Khlongsan, Bangkok, Thailand.
• J Med Assoc Thai. 2006 May 1;89(5):571-6.

ObjectiveTo study the effectiveness of intracutaneous injections of sterile water in relieving low back pain during labor in Thai women.Study DesignRandomized controlled trial.SettingDepartment of Obstetrics and Gynecology, Taksin Hospital, Bangkok.Material And MethodFifty pregnant women at term, requiring pain relief for severe low back pain during the first stage of labor. The women were randomized to receive either 4 intracutaneous injections of 0.1 mL sterile water (n = 25) or isotonic saline as placebo (n = 25).Main Outcome MeasuresPain scores measured by visual analogue scale.ResultsMean pain scores were significantly lower among the treatment group compared to the placebo group at 30 minutes, 1 and 2 hours after injections (p = 0.018, 0.046, and 0.027 respectively). Mean pain reduction were significantly greater in the treatment group compared to the placebo group at 30 minutes, 1 and 2 hours after injections (p < 0.001). There was no difference between the two groups with regard to time to delivery and rate of instrumental and cesarean delivery.ConclusionThe intracutaneous injections of sterile water was found to be an effective treatment against lower back pain during the first stage of labor.

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