腋窝臂丛神经阻滞时感觉异常与神经刺激之间的关系是什么？
What is the relationship between paresthesia and nerve stimulation for axillary brachial plexus block?
作者信息
Choyce A, Chan V W, Middleton W J, Knight P R, Peng P, McCartney C J
机构信息
Department of Anesthesia, University of Toronto, University Health Network, Toronto Western Hospital, Toronto, Ontario, Canada.
出版信息
Reg Anesth Pain Med. 2001 Mar-Apr;26(2):100-4. doi: 10.1053/rapm.2001.21740.
BACKGROUND AND OBJECTIVES
To quantify the motor threshold current of a needle following elicitation of paresthesia during axillary brachial plexus block (ABPB).
METHODS
This is a prospective, observational study of ABPB in 72 patients. Having elicited paresthesia, the minimum current required to produce a motor response was noted. The development and success of the block were subsequently followed.
RESULTS
Nineteen blocks were excluded (18 because of arterial puncture and 1 blocked needle). Of the remaining 53 blocks, 41 (77%) produced a motor response at 0.5 mA or less. The median current was 0.17 mA (range, 0.03 to 3.3 mA). The site of initial paresthesia and subsequent motor response were related in 43 (81%) of cases.
CONCLUSIONS
A needle position causing paresthesia produced a motor response at 0.5 mA or less in 77% of cases studied. This current may, therefore, be a reasonable threshold to aim for when performing an ABPB.
背景与目的
在腋路臂丛神经阻滞（ABPB）过程中，当引出感觉异常后，对穿刺针的运动阈值电流进行量化。
方法
这是一项对72例患者进行的腋路臂丛神经阻滞前瞻性观察研究。引出感觉异常后，记录产生运动反应所需的最小电流。随后观察阻滞的进展及成功情况。
结果
排除19例阻滞（18例因动脉穿刺，1例因穿刺针堵塞）。在其余53例阻滞中，41例（77%）在0.5 mA或更低电流时产生了运动反应。中位电流为0.17 mA（范围0.03至3.3 mA）。43例（81%）病例中，最初感觉异常的部位与随后的运动反应相关。
结论
在所研究的病例中，77%的情况下，引起感觉异常的穿刺针位置在0.5 mA或更低电流时产生了运动反应。因此，在进行腋路臂丛神经阻滞时，该电流可能是一个合理的目标阈值。
Zotero 插件