Tasman A J, Wallner F, Kolling G H
Universitäts-HNO-Klinik Heidelberg.
HNO. 1996 Feb;44(2):73-7.
Rigid endoscopes are used as an alternative to the operating microscope for visual control during paranasal sinus surgery. Since the view through the endoscope is monocular, perception of depth (stereopsis) through the operating microscope must be expected to be superior due to the binocular view afforded. To investigate whether monocular visualization through an endoscope is a disadvantage in paranasal sinus surgery, we compared stereoacuity in a model of the nasal cavity, using a head lamp, an operating microscope and a 0 degree Hopkin's endoscope. Twenty volunteers had to touch defined points in a spatial model of the nasal cavity. Under binocular vision with a head lamp, performance was significantly better than with the microscope or the endoscope. Manipulations were performed with the same speed under microscopic and endoscopic control, although under microscopic guidance more faults in point sequence were made than with the endoscope. Various monocular phenomena seem to allow sufficient spatial orientation through the endoscope, so that monocular visualization does not appear to be a disadvantage for quick and safe manipulations during functional endoscopic sinus surgery.
在鼻旁窦手术中，硬性内窥镜可作为手术显微镜的替代工具用于视觉控制。由于通过内窥镜的视野是单眼的，而手术显微镜提供双眼视野，因此预计其深度感知（立体视觉）会更优越。为了研究在内窥镜下进行单眼可视化在鼻旁窦手术中是否存在劣势，我们使用头灯、手术显微镜和0度霍普金斯内窥镜，在鼻腔模型中比较了立体视敏度。20名志愿者必须触摸鼻腔空间模型中的特定点。在头灯的双眼视觉下，操作表现明显优于使用显微镜或内窥镜时。在显微镜和内窥镜控制下，操作速度相同，不过在显微镜引导下，点顺序出现的错误比内窥镜下更多。各种单眼现象似乎能使通过内窥镜进行足够的空间定向，因此单眼可视化在功能性内窥镜鼻窦手术中似乎并非快速安全操作的劣势。
