4.2存在的问题
朱剑峰等[40]对188例RRDChD的术式按照PVR选择手术适应证,是一项较有价值的回顾性研究,其中C13 69例,D13 42例,认为C13和D级均较适合于玻璃体手术。对于早期病例与我们的临床观察相符[9,10]。如果就治疗而言,按照PVR的分级进行手术选择无可非议。但是,就疾病的发生与预防角度去考虑就存在一些问题,因为RRD和ChD的“伴发”或“合并”有早期的和晚期的两种情况,前者就是我们定义的RRDChD,而后者就较为复杂,如果按照前述脉络膜脱离发生的不可预测的特性,怎样确认ChD和增生(PVR)的因果关系?也就是说,是ChD 导致了增生? 还是增生导致了ChD?可能,两者因素均存在;任何一种RD,无论是孔源性,还是牵拉性的,到了晚期,都会发生ChD,那么,何者为渗漏引起的呢?根据RRDChD的发现[1]和对此病的观察[210],RRDChD不是RRD和ChD的“伴发”或“合并”简单的组合,有其联系和发生的关系,怎样的联系和关系才构成一个疾病实体(病种)。最有说服力的应该是追踪随访,在RRD早期某个时段发生了ChD,经过自然过程到PVRD,这是不现实的。如果PVR D级RRD和ChD的组合不能说明其来源,PVR D级即使有ChD,也不能称其为RRDChD的PVR D级,反之,如果RRDChD以PVR分型不妥,那么,也就失去了其PVR分型的意义,只好将它作为一种特殊类型。如果将ChD作为RRD发生后视网膜外屏障破坏的严重表现,就应作为一种并发症,也就勿谈特殊类型了。在此一点体会,只提出问题和一些假设,离下结论还为时过早,RRDChD是集神经和血管等多系统异常于一疾病的复杂临床表现,很多未知有待于进一步研究和证实。
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