Tsui Ban C H
Department of Anesthesiology and Pain Medicine, University of Alberta Hospital, Edmonton, Alberta, Canada.
Reg Anesth Pain Med. 2007 Jan-Feb;32(1):84-8. doi: 10.1016/j.rapm.2006.09.009.
Ultrasound guidance can increase success with peripheral nerve blocks. Accurate anesthetic injection is optimized with both clear visualization and fine adjustment of the needle tip at the target area. Good needle alignment with the ultrasound beam and using a freehand technique are both desirable for these conditions. The purpose of this report is to describe how a unique, in-plane laser guide may be used to improve the alignment of injection needles with ultrasound beams in order to promote best needle tip visualization.
By using a small, battery-operated laser unit mounted onto an ultrasound transducer, a method to align the ultrasound scanning plane and laser-line projection plane was developed. Such alignment was further demonstrated and illustrated in a water bath model. Ultrasound was then used to show how clearly the needle shaft and tip can be visualized after needle alignment to the ultrasound beam using the laser line shining on the shaft of the needle.
This in vitro demonstration describes the potential use of a readily available laser-line unit to assist with in-plane needle alignment with the ultrasound plane in order to ultimately improve needle visibility during ultrasound-guided peripheral nerve block. It requires minimum specialized training and may allow for maximum flexibility with freehand needle insertions in a sterile fashion.
超声引导可提高周围神经阻滞的成功率。在目标区域清晰可视化并精细调整针尖可优化麻醉注射的准确性。在这些情况下，使针与超声束良好对齐并采用徒手技术都是可取的。本报告的目的是描述一种独特的平面激光导向装置如何用于改善注射针与超声束的对齐，以促进最佳的针尖可视化。
通过将一个小型电池驱动的激光装置安装在超声换能器上，开发了一种使超声扫描平面和激光线投影平面对齐的方法。这种对齐在水浴模型中得到了进一步演示和说明。然后使用超声来展示在使用照射在针杆上的激光线使针与超声束对齐后，针杆和针尖的可视化程度有多清晰。
这个体外演示描述了一种现成的激光线装置在平面内辅助针与超声平面对齐的潜在用途，以便最终在超声引导的周围神经阻滞过程中提高针的可视性。它需要最少的专业培训，并且在无菌状态下徒手插入针时可能具有最大灵活性。
