Department of Anaesthesiology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
Anesth Analg. 2010 Nov;111(5):1325-7. doi: 10.1213/ANE.0b013e3181f1bbb6. Epub 2010 Aug 12.
The optimal site for local anesthetic placement during ultrasound-guided infraclavicular block remains controversial.
Patients were randomized to receive lidocaine 2% 30 mL as a single injection posterior to the axillary artery (n = 51) or a triple injection ideally adjacent to each brachial plexus cord (n = 49). Pinprick sensory and motor block (3 = no block, 0 = complete block) were assessed to 20 minutes in the 4 distal nerve territories.
The single injection group was not significantly inferior (single versus triple injection median [interquartile range] 20-minute aggregate block score: 5 [2-9] vs 7 [3.5-11]) but also demonstrated superiority (2-tailed test, P = 0.043). The single injection technique was associated with a small reduction in procedural time.
The optimal site for local anesthetic placement during ultrasound-guided infraclavicular block is a single point injection posterior to the axillary artery.
在超声引导锁骨下阻滞中，局部麻醉剂的最佳注射部位仍存在争议。
患者随机分为两组，分别接受腋动脉后单点注射 2%利多卡因 30ml（n=51）或理想情况下邻近每个臂丛神经束的三点注射（n=49）。在 4 个远端神经区域评估到 20 分钟时的针刺痛觉和运动阻滞（3=无阻滞，0=完全阻滞）。
单点注射组无明显劣势（单点与三点注射 20 分钟总阻滞评分中位数[四分位间距]：5[2-9]比 7[3.5-11]），但也表现出优势（双侧检验，P=0.043）。单点注射技术与操作时间的轻微减少相关。
在超声引导锁骨下阻滞中，局部麻醉剂的最佳注射部位是腋动脉后的单点注射。
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