THE PHYSICAL AND SURGICAL ASPECTS OF SILICONE OIL IN THE VITREOUS CAVITY
THE PHYSICAL AND SURGICAL ASPECTS OF SILICONE OIL IN THE VITREOUS CAVITY
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DOI：
10.1007/bf02334175
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发表时间：
1987-01-01
影响因子：
2.7
通讯作者：
PETERSEN, J
中科院分区：
文献类型：
--
作者：
PETERSEN, J
由于浮力、体积位移和表面张力，玻璃体腔内的硅油对视网膜施加力。表面张力而不是粘度是理解为什么油能有效地密封视网膜破裂的关键。对填塞物的物理性质进行了定量研究。视网膜牵引力可以被油抵消，直到计算出的阈值，这取决于撕裂的大小和形状、表面张力的强度以及最重要的是视网膜和脉络膜之间的距离。对于几乎平坦的视网膜裂孔，填塞物非常有效。这些理论结果意味着手术的直接规则，这些规则已经在150次手术中得到了验证。必须尝试填充100%的玻璃体腔。由于空气-水边界的表面张力是水-油边界的3倍，因此最有效的方法是通过流体-气体交换使视网膜变平，然后将其夹在平坦位置，植入硅油。视网膜下间隙或前房中的硅胶往往会自发缩回，因为表面张力会导致较小的气泡吹大较大的气泡。手术方法描述利用它。
Silicone oil inside the vitreous cavity exerts forces on to the retina as a result of buoyancy, volume displacement, and surface tension. Surface tension rather than viscosity is the key to understanding why the oil seals retinal breaks effectively. The physics of the tamponade was studied quantitatively. Retinal traction can be counteracted by the oil up to a calculated threshold value, depending on the size and shape of the tear, the strength of the surface tension and, most importantly, the distance between the retina and choroid. For a nearly flat retinal hole, the tamponade is very effective. These theoretical results imply straightforward rules for surgery, rules that have been tested in 150 operations. An attempt must be made to fill 100% of the vitreous cavity. Since the air-water boundary has 3 times the surface tension of the water-oil boundary, the most effective procedure is to flatten the retina by means of a fluid-gas exchange and then clamp it in a flat position, implanting the silicone oil. Silicone in the subretinal space or the anterior chamber tends to retract spontaneously, for surface tension causes the smaller bubble to blow up the larger one. Surgical methods are described to make use of it.