Riedel P, Mrochen M, Donitzky C, Seiler T
Augenklinik im Universitätsklinikum Carl Gustav Carus der TU Dresden.
Ophthalmologe. 2000 Sep;97(9):615-8. doi: 10.1007/s003470070048.
Movements and vibrations of intraocular structures can be observed during vitrectomy with mechanical cutting systems. We experimentally compared these intraocular motion artifacts between mechanical and erbium:YAG laser vitrectomy.
The intraocular structures were reliably simulated by a 0.9-mm-wide foil (thickness 10 microns) in a water-filled cuvette. The movements caused by commercial mechanical cutter systems were compared with vibration induced by means of laser surgery probes (laser pulse energy 20 mJ). Laser triangulation was used to measure the movement amplitudes at various cutting rates of 2, 5, and 10 Hz and a constant suction force of 50 mmHg.
At all cutting rates the amplitude with the laser was less than that with the mechanical system. The ratio of the maximal amplitude between laser surgery probes (AL) and mechanical cutter system (AM) was AL/AM = 0.29 at 10 Hz, AL/AM = 0.33 at 5 Hz, and AL/AM = 0.45 at 2 Hz.
The reduced intraocular movements with erbium:YAG laser vitrectomy constitutes a potential advantage for the nonpulsatile vitrectomy.
在使用机械切割系统进行玻璃体切除术时，可以观察到眼内结构的移动和振动。我们通过实验比较了机械玻璃体切除术和铒：钇铝石榴石激光玻璃体切除术之间的这些眼内运动伪像。
在充满水的比色皿中，用一个0.9毫米宽的箔片（厚度10微米）可靠地模拟眼内结构。将商用机械切割系统引起的运动与通过激光手术探头诱导的振动（激光脉冲能量20毫焦）进行比较。使用激光三角测量法在2、5和10赫兹的不同切割速率以及50毫米汞柱的恒定吸力下测量运动幅度。
在所有切割速率下，激光产生的幅度均小于机械系统产生的幅度。激光手术探头（AL）与机械切割系统（AM）之间的最大幅度比在10赫兹时为AL/AM = 0.29，在5赫兹时为AL/AM = 0.33，在2赫兹时为AL/AM = 0.45。
铒：钇铝石榴石激光玻璃体切除术减少了眼内运动，这对非脉冲式玻璃体切除术而言是一个潜在优势。
