Kumar A, Sharma N, Singh R
Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi.
Acta Ophthalmol Scand. 1998 Aug;76(4):496-8. doi: 10.1034/j.1600-0420.1998.760420.x.
To evaluate the efficacy of a new technique of prone position ultrasonography in cases with silicone filled eyes.
Forty patients with prior pars plana vitrectomy and silicone oil instillation referred to a tertiary eye care centre were the subjects of this study. A prospective clinical trial was undertaken to evaluate the efficacy of prone position ultrasonography in addition to routinely performed supine position ultrasonography in these patients. The technique was undertaken by 2 independent observers and compared with the findings by indirect ophthalmoscopy or surgical results. Interobserver variability was also calculated.
Two spikes were observed in supine position corresponding to the intravitreal silicone oil surface and the sclera, whereas a single spike corresponding to the sclera was observed in prone position. Supine position ultrasonography yielded a diagnostic accuracy of 61.8%, which increased to 96.7% when the procedure was supplemented with prone position ultrasonography. Specificity increased from 75 to 100% by the addition of this adjuvant procedure, however, with no significant difference in the interobserver variability ('K'=0.67 Vs 'K'= 0.62).
Prone position ultrasonography is a useful adjunct to the routinely performed supine position ultrasonography in silicone filled eyes and increases the diagnostic yield.
评估俯卧位超声检查新技术在硅油填充眼病例中的疗效。
本研究纳入了40例曾行玻璃体切除术并注入硅油且转诊至三级眼科护理中心的患者。进行了一项前瞻性临床试验，以评估在这些患者中，除常规仰卧位超声检查外，俯卧位超声检查的疗效。该技术由2名独立观察者操作，并与间接检眼镜检查结果或手术结果进行比较。还计算了观察者间的变异性。
仰卧位观察到两个波峰，分别对应玻璃体内硅油表面和巩膜，而俯卧位观察到一个对应巩膜的波峰。仰卧位超声检查的诊断准确率为61.8%，当该检查辅以俯卧位超声检查时，准确率提高到96.7%。通过添加这种辅助检查，特异性从75%提高到100%，然而，观察者间变异性无显著差异（“K”=0.67对“K”=0.62）。
俯卧位超声检查是常规仰卧位超声检查在硅油填充眼中的有用辅助手段，可提高诊断率。
