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严重化学烧伤和热烧伤在愈合时,眼表面总是有大量新生血管和瘢痕形成。手术修复则导致愈合不良和新生血管复发,即使在外伤后很多年再手术亦如此。最近用动物实验证实:受侵蚀的角膜为结膜所复盖,其上皮的糖原含量和酶的水平出现异常可达数周之久。因此,有人试图由其他地方切取未受过伤的组织来进行修复。例如用口腔粘膜或直肠粘膜。前者可使眼表面满意地修复,但角膜仍有血管形成,后者效果不满意。本文作者用对侧眼的健康结膜修复取得一定成果。方法:沿角膜缘剪开球结膜和球筋膜,使之后退到离角膜缘5mm处,让巩膜裸露。从角膜缘开始剖解,切除角膜的上皮层和有新生血管的浅实质层。在手术显微镜下操作,可避免角膜穿孔。
Severe chemical burns and thermal burns in the healing, the eye surface is always a large number of neovasculature and scarring. Surgical repair leads to poor healing and neovascular recurrence even after many years of trauma. Recent animal experiments confirm that the eroded cornea is covered by the conjunctiva and its epithelial glycogen content and enzyme levels can be abnormal for up to several weeks. As a result, someone tried to take the injured tissue elsewhere for repair. For example with the oral mucosa or rectal mucosa. The former can make the eye surface satisfactorily repaired, but the cornea still has the formation of blood vessels, the latter is not satisfied. The author achieved some results with the healthy conjunctival repair of the contralateral eye. Method: Cut the conjunctiva and bulb fascia along the limbus so that it recedes 5 mm from the limbus and expose the sclera. From the limbus began to dissect, remove the corneal epithelium and neovascular shallow parenchyma. Operating under the microscope to avoid corneal perforation.