Jacobi V, Thalhammer A, Kirchner J
Institut für Allgemeine Röntgendiagnostik, Klinikum der Johann Wolfgang Goethe Universität, Theodor Stern Kai 7, Frankfurt, Germany.
Eur Radiol. 1999;9(1):137-40. doi: 10.1007/s003300050644.
The aim of this study was to check the handling and usefulness of a laser puncture system. The laser has tacking optics and is fastened to a sledge with angle graduation. The sledge runs on a bar fixed to the computerized tomograph (CT) parallel to the scan level. By means of a phantom, three experienced and seven inexperienced physicians made punctures with and without laser, using varying angles in single and double angulation. The distance from needle tip to target was measured. The handling of the puncture system proved to be problem-free. With both single and double angulation, the measurement differences with and without support were so small among experienced puncturers that there was no significant difference, with the exception of one double angulation (10 degrees/45 degrees). Among the beginners, there was a significant difference (P < 0.001, P < 0.05), with both single and double angulation. The accuracy of the beginners improved with use of the laser; experienced puncturers may profit from practice with small and hard-to-reach focuses. In terms of educational benefits, the laser guidance system offers great advantages and increased confidence for beginners.
本研究的目的是检验一种激光穿刺系统的操作性能及实用性。该激光具有定位光学装置，并固定在带有角度刻度的滑板上。滑板在固定于计算机断层扫描仪（CT）且与扫描平面平行的横杆上运行。借助一个体模，三名经验丰富的医生和七名经验不足的医生分别使用单角度和双角度、不同角度，在有激光和无激光辅助的情况下进行穿刺。测量针尖到靶点的距离。结果表明，穿刺系统的操作没有问题。对于经验丰富的穿刺者，无论是单角度还是双角度穿刺，有激光辅助和无激光辅助时的测量差异都很小，除了一种双角度（10度/45度）情况外，没有显著差异。对于初学者，无论是单角度还是双角度穿刺，都存在显著差异（P < 0.001，P < 0.05）。使用激光后，初学者的穿刺准确性有所提高；经验丰富的穿刺者在对小的、难以触及的靶点进行穿刺时，练习可能会有帮助。在教学方面，激光引导系统具有很大优势，能增强初学者的信心。
