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应用西德 Opton 公司 Visulas Nd∶YAG 激光机和美国 Coopervision 公司的 Model 2500 Nd∶YAG 激光机作了80只眼(68例)的周边虹膜切开术。平均发射次数20.5次(1～127次);平均发射能量2.5毫焦耳(0.9～5.6毫焦耳)。虹膜穿透成功率(孔洞不少于0.2mm~2)为97.6%。虹膜类型是影响激光发射次数与发射平均能量的最主要原因。Nd∶YAG 激光虹膜切开术主要并发症是一时性眼压增高与虹膜出血。眼压升高大多发生在激光治疗后2小时内。虹膜出血约见于39%的病例,但这种出血是轻微和能自止。此外,眼压升高与激光发射次数及发射能量没有相关关系。本文还讨论了 Nd∶YAG 激光治疗后眼压升高的原因及其处理方法,Nd∶YAG 激光虹膜切开术的优点以及尚待进一步研讨的问题。
Peripheral iridotomy was performed in 80 eyes (68 cases) with the Visulas Nd:YAG laser from Opton and the Model 2500 Nd:YAG laser from Coopervision. The average launching frequency was 20.5 times (1 ~ 127 times); the average launching energy was 2.5 millijoules (0.9 ~ 5.6 millijoules). Iris penetration success rate (hole not less than 0.2mm ~ 2) was 97.6%. The iris type is the most important factor that affects the number of laser shots and the average energy emitted. Nd:YAG laser iridotomy is the main complication of transient intraocular pressure and iris bleeding. IOP mostly occurred within 2 hours after laser treatment. Iris bleeding is seen in 39% of cases, but this bleeding is mild and self-limiting. In addition, elevated intraocular pressure and the number of laser emission and launch energy has no correlation. This article also discusses the causes and treatment of elevated intraocular pressure after Nd:YAG laser treatment, the advantages of Nd:YAG laser iridectomy and the issues to be further studied.