| 刘守国,励建安,朱 杰,李 冰.神经阻滞的注射针定位中电刺激强度与针尖-神经干距离及针尖斜面方向关系的实验研究[J].中国康复医学杂志,2009,24(11):981~984 |
| 神经阻滞的注射针定位中电刺激强度与针尖-神经干距离及针尖斜面方向关系的实验研究 点此下载全文 |
| 刘守国 励建安 朱 杰 李 冰 |
| 南京医科大学第一附属医院康复医学科，南京，210029 |
| 基金项目： |
| DOI： |
| 摘要点击次数: 2340 |
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| 摘要： |
| 目的：探讨神经阻滞注射针定位技术的针尖-胫神经干距离与刺激电流强度关系，为神经阻滞技术的临床应用提供理论依据。方法：新西兰大白兔7只，体重2.5±0.5kg，雌雄不限。兔大腿后外侧纵向切口暴露胫神经干14条，以三维定位仪定位针尖与神经干间距离，分别于针尖-神经干距离为0mm、1mm、2mm、3mm、4mm、5mm处调节刺激器电流（直流电方波输出，波宽0.2ms，频率2Hz）强度，记录诱导靶肌肉收缩的最低刺激电流。结果：最低电流刺激强度分别为：0.28±0.07mA（0mm）、0.34±0.08mA（1mm）、0.44±0.10mA（2mm）、0.58±0.15mA（3mm）、0.74±0.17mA（4mm）、0.91±0.21mA（5mm）。以针尖-神经干距离为自变量X，最低电刺激强度均数为应变量Y，直线回归分析示两者间存在线性回归关系，方程为Y=0.13X+0.22, 决定系数r2=0.974。结论：注射针定位中针尖-神经干距离与刺激电流强度呈线性回归关系，对临床神经阻滞中的注射针定位有指导意义。 |
| 关键词：神经溶解 注射针 定位 胫神经 电刺激 |
| The influence of nerve-needle distance and orientation of needle bevel surface on the magnitude of electrical stimulation in nerve block procedure Download Fulltext |
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| Department of Rehabilitation Medicine, First Affiliated Hospital of Nanjing Medical University, 210029 |
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| Abstract: |
| Objective：To explore the relationship of electrical stimulation magnitude and nerve-needle distance in nerve block procedure and provide the basis for clinical application of nerve block. Method: Seven New Zealand white rabbits were selected for experiment. Pentobarbital (30mg/kg) was employed for general anesthesia. A longitudinal incision was performed at the posterior thigh to expose the tibial nerve. Totally 14 nerves were studied. The nerve-needle distance was located by using a 3-dimensional manipulator. The nerve-needle distances of 0mm, 1mm, 2mm, 3mm, 4mm and 5mm were chosen for testing motor response to the electrical stimulation (pulse width: 0.2ms; pulse frequency: 2Hz) from the needle. The lowest intensities of electrical current to induce muscle contraction were recorded for all distances. Result:The lowest intensities of electrical current was 0.28±0.07mA(0mm), 0.34±0.08mA(1mm),0.44±0.10mA(2mm),0.58±0.15mA(3mm), 0.74±0.17mA(4mm) and 0.91±0.21mA(5mm) respectively. Taking nerve-needle distances as independent variables X, lowest intensities of electrical current as Y, linear regression analysis showed linear relationship between X and Y (Y=0.13X+0.22, r2=0.974). Conclusion: A positive-linear relationship of nerve-needle distance and electrical stimulation magnitude exists in nerve block procedure, which could be used as an important reference for localization of injection needle in clinical practice. |
| Keywords:neurolysis needle localization tibial nerve electrical stimulation |
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