Pinkerton O D
Ophthalmic Surg. 1979 Sep;10(9):45-7.
The results of a study of 975 pterygia treated surgically and immediately with Strontium 90 are presented. The recurrence rate (quiescent) was 6%. The actual recurrence requiring surgery was 0.82%. Technique of removal involves simple wide excision and immediate treatment with Strontium 90 over the entire area. Three thousand RADS is the maximum dosage. In most instances more than 3000 RADS is cataractogenic. Two methods of Strontium 90 production are discussed. Strontium 90 has a half life of 19.9 plus or minus .3 years. It decomposes to Yttrium 90 which has a half life of 62 hours. Tissue penetration is estimated by the use of polystyrene absorber which is considered to be a tissue equivalent. Age and sex occurrence is given from a survey of 832 patients. Newer developments that might replace Strontium 90 are briefly discussed.
本文介绍了对975例翼状胬肉进行手术切除并立即使用锶90治疗的研究结果。复发率（静止期）为6%。实际需要再次手术的复发率为0.82%。切除技术包括简单的广泛切除，并在整个区域立即使用锶90进行治疗。最大剂量为3000拉德。在大多数情况下，超过3000拉德会导致白内障。文中讨论了两种锶90的产生方法。锶90的半衰期为19.9±0.3年。它分解为半衰期为62小时的钇90。通过使用被认为是组织等效物的聚苯乙烯吸收器来估计组织穿透情况。根据对832例患者的调查给出了年龄和性别分布情况。简要讨论了可能取代锶90的新进展。
