Charuluxananan Somrat, Kyokong Oranuch, Premsamran Pornthep
Department of Anesthesiology and Clinical Epidemiological Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
J Med Assoc Thai. 2005 Nov;88(11):1569-73.
Size of spinal needle may be a factor which influences the success rate of spinal anesthesia.
To compare learning curves of using 25G and 27G quincke spinal needle for spinal anesthesia.
Department of Anesthesiology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital.
Prospective randomized control trial.
Ten new first year anesthesia residents were randomized to 2 groups: Group I (n = 5) used 25G Quincke spinal needle, Group II (n = 5) used 27G Quincke spinal needle to perform 200 consecutive cases of spinal anesthesia. Number of success and failure was recorded by each individual resident anonymously. The learning curves of plotted by cumulative sum of success rate revealed an initial rapid improvement of success during the first 20 cases in both groups. The overall success rate of group I was 84% (95CI, 66.5-100) and group II was 87% (95%CI, 61.5-100); p = 0.89. The widest difference between the 2 learning curves at 20 attempts intervals was at the twentieth attempts with a success rate of 76.0% VS 65.0% in group I and group II respectively; p = 0.54.
The learning curves of spinal anesthesia using 25G and 27G Quincke spinal needle showed rapid improvement of success rate at the first 20 spinal block and high overall success rate with no significant difference between the groups.
脊椎穿刺针的尺寸可能是影响脊椎麻醉成功率的一个因素。
比较使用25G和27G昆克氏脊椎穿刺针进行脊椎麻醉的学习曲线。
朱拉隆功大学医学院麻醉科及朱拉隆功国王纪念医院。
前瞻性随机对照试验。
十名新入职的一年级麻醉住院医师被随机分为两组：第一组（n = 5）使用25G昆克氏脊椎穿刺针，第二组（n = 5）使用27G昆克氏脊椎穿刺针，连续进行200例脊椎麻醉。每位住院医师匿名记录成功和失败的次数。通过成功率的累积总和绘制的学习曲线显示，两组在前20例中成功率均有最初的快速提高。第一组的总体成功率为84%（95%置信区间，66.5 - 100），第二组为87%（95%置信区间，61.5 - 100）；p = 0.89。两组学习曲线在20次尝试间隔时的最大差异出现在第20次尝试时，第一组和第二组的成功率分别为76.0%对65.0%；p = 0.54。
使用25G和27G昆克氏脊椎穿刺针进行脊椎麻醉的学习曲线显示，在前20次脊椎阻滞时成功率迅速提高，总体成功率高，两组之间无显著差异。
