Stanley R J, McCaffrey T V, Offord K P, DeSanto L W
Department of Otorhinolaryngology, Mayo Clinic, Rochester, MN 55905.
Laryngoscope. 1989 Jan;99(1):19-22. doi: 10.1288/00005537-198901000-00005.
Thirteen cadaver orbits were studied to determine whether noninvasive clinical measurements of globe excursion could be used to predict intraorbital pressure. Intraorbital pressure measurements, exophthalmometry, and orbitonometry (which measures resistance to globe retrodisplacement) were performed at 1-ml increments to 12 ml of added orbital volume. Orbitonometry, performed with forces of 100, 200, and 300 g, yielded both E (global position) and Y (retrodisplacement) values. Plots of orbital pressure against percentage of excursion, a function of orbital retrodisplacement (that is, orbital pressure versus [(E0 - E300)/E0] x 100), for 131 paired values over all orbits yielded a function with low percentage of excursion values associated with high intraorbital pressures. This relationship reflected both the proptosis and the increased orbital tension produced by added volumes. Comparison of clinical orbitonometry data with such experimental data may allow predictions about which patients are threatened by critical intraorbital pressure levels and may benefit from orbital decompression surgery to preserve vision.
研究了13个尸体眼眶，以确定眼球运动的非侵入性临床测量是否可用于预测眶内压力。以1毫升的增量向眼眶内添加液体，直至眼眶容积增加到12毫升，在此过程中进行眶内压力测量、眼球突出度测量和眶压测量（测量眼球后移阻力）。使用100、200和300克的力进行眶压测量，得出E（眼球位置）和Y（后移）值。对所有眼眶的131对数值绘制眼眶压力与眼球运动百分比的关系图，眼球运动百分比是眼眶后移的函数（即眼眶压力与[(E0 - E300)/E0]×100），结果得到一个函数，其中眼球运动百分比值较低与眶内压力较高相关。这种关系反映了由增加的容积所产生的眼球突出和眼眶张力增加。将临床眶压测量数据与此类实验数据进行比较，可能有助于预测哪些患者受到临界眶内压力水平的威胁，以及哪些患者可能从眼眶减压手术中受益以保护视力。
