Norris M C, Dewan D M
Br J Anaesth. 1987 Mar;59(3):338-41. doi: 10.1093/bja/59.3.338.
The effect of gravity on the spread of extradural anaesthesia was evaluated in a series of parturients undergoing elective Caesarean section. Following placement of an extradural catheter, 25 patients were placed 30-40 degrees head-up for 20 min during the administration of the local anaesthetic drug; 25 additional patients remained supine during injection. Extradural anaesthesia was induced with 3% 2-chloroprocaine 23 ml and analgesia to pinprick assessed at 5-min intervals. Additional drug was given after 20 min, if required. There were no differences in the rate of onset of sacral blockade or in the extent of neural blockade between the two groups. The semi-upright position was not necessary to ensure adequate sacral anaesthesia for Caesarean section.
在一系列接受择期剖宫产的产妇中评估了重力对硬膜外麻醉扩散的影响。放置硬膜外导管后，25例患者在给予局部麻醉药期间头抬高30 - 40度20分钟；另外25例患者在注射期间保持仰卧位。用23毫升3%的2 - 氯普鲁卡因诱导硬膜外麻醉，并每隔5分钟评估对针刺的镇痛效果。如有需要，20分钟后给予追加药物。两组之间在骶部阻滞的起效速度或神经阻滞范围方面没有差异。半直立位对于确保剖宫产有足够的骶部麻醉并非必要。
