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对11名初产妇用双导管法进行高位(T_(12)-L_1)和低位(L_4-L_5)两管硬膜外麻醉,来进行产痛的神经支配和子宫感觉神经支配的临床研究。硬麻针刺入角度及从皮肤到硬膜外腔垂直距离为胸_(12)-腰_1一管是76°±12°4±0.5cm腰_4-腰_5管是82°±8°,4.5±0.5cm。第一产程宫口开大4.6±1.2cm时开始麻醉,注入0.5%Marcaine(bupivacain)5 ml。直待产痛出现后再注入5ml。首次药物注入的有效时间是1小时57分±34分。由此得到的麻醉水平是胸_(9、4)-腰_(1、6)。在此情况下宫口开大8cm前均无痛感。至开全无痛的有7例。开大8cm以后有痛的4例。但这4例儿头下降显
Eleven primiparous women underwent bilateral catheterization with high-dose (T_ (12) -L_1) and low-dose (L_4-L_5) epidural anesthesia for pain control and intrauterine sensory innervation. Hard needle puncture angle and the vertical distance from the skin to the epidural space chest (12) - waist _1 a tube is 76 ° ± 12 ° 4 ± 0.5cm waist _4-waist _5 tube is 82 ° ± 8 °, 4.5 ± 0.5 cm. The first labor cervix open big 4.6 ± 1.2cm start anesthesia, injection of 0.5% Marcaine (bupivacain) 5 ml. Immediately after the emergence of labor pain and then injected 5ml. The first time the drug is injected is 1 hour 57 minutes ± 34 minutes. The resulting level of anesthesia was thoracic (9,4) - lumbar (1,6). In this case cervix open 8cm before no pain. To open all the painless in 7 cases. After the big open 8cm pain in 4 cases. However, these 4 cases of children decreased significantly