Developing and Establishing an Ideal Method of Continuous-Infusion Epidural Analgesia for Delivery Using the Double-Catheter Method

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We evaluated the efficacy of a new method of induction of epidural obstetric analgesia devised by us. The upper and lower catheters used for the epidural double-catheter method were connected to a compression-type disposable injector (Coopdech Syrinjector). 0.125% bupivacaine +2ug/ml fentanyl (6ml/h) were serially injected via the upper catheter. In the latter half of Stage 1 of labor, the same drugs were continuously infused via the lower catheter (4ml/h). The mean number of additional drug doses administered via the upper catheter was 0.67±0.90 (range: 0-3) when the analgesia induction was commenced after the cervix was dilated to 8cm in nulliparous women or 6cm in multiparous women. The method of analgesia was found to be more effective than the conventional method (uncombined continuous infusion of a local anesthetic) for alleviating the pain of the latter half of Stage 1, and Stage 2 of labor. The mean number of additional drug doses injected via the lower catheter was 0.37±0.57 (range: 0-2). The number of additional doses in the 49 women averaged 0.16 per hour and 1.04 per delivery. Thus, good results were obtained.
東海大学の論文