Kim Phyo, Joujiki Masao, Suzuki Masao, Ueki Keisuke, Amano Yoshiaki
Department of Neurosurgery, Dokkyo University School of Medicine, Tochighi, Japan.
Neurosurgery. 2008 Jul;63(1 Suppl 1):ONS188-90; discussion ONS190-1. doi: 10.1227/01.neu.0000335035.15897.ff.
Magnification by surgical loupes has the distinct merits of agility and nimbleness in observation, a wide stereo base effectuating superior depth sensation, and light augmentation by an objective lens that is larger than the pupil. However, continuous use of these loupes causes neck strain for surgeons as a result of flexion posture and fatigue. To minimize the strain and fatigue and maximize the advantages and performance of binocular telescopes, we have developed a novel optical design.
To allow observation of the operative field with the surgeon's neck and eye in a straight position, the light path of the telescopes was angulated downward with roof prisms. For maximum image quality, Keplerian real-image optics were adopted.
The optics, finishing of the lens, and assembly were perfected through practical trials of more than 500 procedures over a period of 3 years.
The new ergonomically designed optics provide excellent image quality comparable to standing microscopes in the low to medium range of magnification, while effectively reducing the neck flexion of surgeons working in the operative field below and relieving the surgeon's fatigue during hours of continuous use.
手术放大镜放大具有观察灵活敏捷、立体视差大产生优越深度感以及物镜大于瞳孔实现光线增强等显著优点。然而，持续使用这些放大镜会因屈曲姿势导致外科医生颈部劳损和疲劳。为了将劳损和疲劳降至最低，并最大限度地发挥双目望远镜的优势和性能，我们开发了一种新颖的光学设计。
为使外科医生在颈部和眼睛处于伸直位置的情况下观察手术区域，望远镜的光路通过屋脊棱镜向下倾斜。为实现最大图像质量，采用了开普勒实像光学系统。
经过3年超过500例手术的实际试验，光学器件、镜片加工和组装得以完善。
新的符合人体工程学设计的光学器件在低至中等放大倍率范围内提供与立式显微镜相当的出色图像质量，同时有效减少在下方手术区域工作的外科医生的颈部屈曲，并缓解外科医生在长时间持续使用过程中的疲劳。
