Hutchens Thomas C, Giglio Nicholas C, Cilip Christopher M, Rosenbury Sarah G, Hardy Luke A, Kerr Duane E, Nau William H, Fried Nathaniel M
Annu Int Conf IEEE Eng Med Biol Soc. 2020 Jul;2020:5049-5052. doi: 10.1109/EMBC44109.2020.9176571.
Suture ligation of vascular tissues is slow and skill intensive. Ultrasonic (US) and radiofrequency (RF) devices enable more rapid vascular tissue ligation to maintain hemostasis, than sutures and mechanical clips, which leave foreign objects in the body and require exchange of instruments. However, US and RF devices are limited by excessive collateral thermal damage to adjacent tissues, and high jaw temperatures that require a long time to cool. A novel alternative method using infrared (IR) laser energy is being developed for more rapid and precise sealing of vessels. This study describes design, modeling, and initial testing of several optical beam shaping geometries for integration into the standard jaws of a laparoscopic device. The objective was to transform the circular laser beam into a linear beam, for uniform, cross-irradiation and sealing of blood vessels. Cylindrical mirrors organized in a staircase geometry provided the best spatial beam profile.Clinical Relevance-This study explored several optical designs for potential integration into the standard jaws of a laparoscopic vessel sealing device, transforming a circular laser beam into a linear beam for sealing of vascular structures.
血管组织的缝合结扎操作缓慢且需要熟练技巧。与缝合线和机械夹相比，超声（US）和射频（RF）设备能实现更快的血管组织结扎以维持止血，因为缝合线和机械夹会在体内留下异物且需要更换器械。然而，US和RF设备存在局限性，即对相邻组织有过度的附带热损伤，且钳口温度高，需要很长时间才能冷却。一种使用红外（IR）激光能量的新型替代方法正在被开发用于更快速、精确地封闭血管。本研究描述了几种光束整形几何结构的设计、建模及初步测试，这些结构旨在集成到腹腔镜设备的标准钳口中。目的是将圆形激光束转换为线性光束，以实现对血管的均匀交叉照射和封闭。呈阶梯状排列的柱面镜提供了最佳的空间光束轮廓。临床意义——本研究探索了几种光学设计，以便有可能集成到腹腔镜血管封闭设备的标准钳口中，将圆形激光束转换为线性光束用于封闭血管结构。
