Badal John J, Kiesau Annie, Boyle Patrick
University of Arizona, Department of Anesthesiology, Tucson, AZ, USA.
Local Reg Anesth. 2010;3:5-10. doi: 10.2147/lra.s9524. Epub 2010 Feb 23.
Peripheral artery cannulation is a common procedure but can sometimes be difficult. Our goal was to determine if a median nerve block would increase the diameter and flow of the radial artery. Radial artery diameter and peak velocity was measured using a SonoSite Ultrasound System. Using ultrasound guidance, a median nerve block was performed with lidocaine. Subsequent measurements of the radial artery and peak velocity were again made at 5 minutes post-block and 10 minutes post-block. Mean radial artery diameter measured vertically was 0.23 ± 0.06 cm pre-block, 0.23 ± 0.05 cm at 5 minutes post-block, and 0.23 ± 0.05 cm 10 minutes post-block. Mean radial artery diameter measured horizontally was 0.26 ± 0.05 cm pre-block, 0.27 ± 0.06 cm at 5 minutes post-block, and 0.27 ± 0.08 cm 10 minutes post-block. Peak velocities were 11.3 ± 6.9 cm/s pre-block, increased to 15.0 ± 6.9 cm/s 5 minutes post-block (P = 0.005), and finally increased to 17.7 ± 7.8 cm/s 10 minutes post-block (P = 0.01). This study set out to measure the effects of median nerve blockade on the radial artery. We found a significant increase in peak velocities post-median nerve blockade.
外周动脉插管是一种常见的操作，但有时可能会有困难。我们的目标是确定正中神经阻滞是否会增加桡动脉的直径和血流量。使用SonoSite超声系统测量桡动脉直径和峰值流速。在超声引导下，用利多卡因进行正中神经阻滞。在阻滞后5分钟和10分钟再次测量桡动脉和峰值流速。垂直测量的桡动脉平均直径在阻滞前为0.23±0.06厘米，阻滞后5分钟为0.23±0.05厘米，阻滞后10分钟为0.23±0.05厘米。水平测量的桡动脉平均直径在阻滞前为0.26±0.05厘米，阻滞后5分钟为0.27±0.06厘米，阻滞后10分钟为0.27±0.08厘米。峰值流速在阻滞前为11.3±6.9厘米/秒，阻滞后5分钟增加到15.0±6.9厘米/秒（P = 0.005），最终在阻滞后10分钟增加到17.7±7.8厘米/秒（P = 0.01）。本研究旨在测量正中神经阻滞对桡动脉的影响。我们发现正中神经阻滞后峰值流速显著增加。
