ABSTRACT
AIM:To investigate the effect of suramin concentration changes on trabeculectomy in rabbit, and to provide treatment strategies for glaucoma on the basis of experiment. METHODS:Thirty-two albino rabbits were randomly divided into four groups, including standard control group, experimental group Ⅰ, experimental group II, and experimental group Ⅲ. Each eye was performed standard trabeculectomy. During surgery, standard control group was given a piece of cotton with 0. 3mg/mL mitomycin C ( MMC ) for 2min, and the other three groups were given a piece of cotton with 0. 3, 0. 4, and 0.5mg/mL suramin respectively for 2min. The filtering blebs and intraocular pressure ( IOP ) were observed at the 3, 7, 15, and 30d after surgery. Some conjunctiral specimen were observed with hitochemicall ( HE staining) and immunohistochemicall methods. RESULTS:At postoperative 7, 15, and 30d, the changes of the IOP, functional filtering blebs, and the number of positive cell nuclear in experimental group II and experimental group Ⅲ were significantly different compared with those in standard control group and experimental group Ⅰ (all P0. 05). The changes of the IOP and the number of positive cell nuclear in experimental group Ⅲ were significantly different compared with those in experimental group II (P0. 05). The status of filtering channel in experimental groupII and experimental group Ⅲ were better than those in experimental group Ⅰ and standard control group. CONCLUSION: The concentration of suramin has a significantly influence on its effect. When the concentration is 0. 3mg/mL, the antiproliferative effect of suramin is no more than that of MMC. The effect of 0. 4, 0.5mg/mL suramin is better than MMC. 0. 5mg/mL suramin has a better effect on controlling IOP and suppressing the growth of fibroblasts than 0. 4mg/mL suramin.
ABSTRACT
AIM: To investigate the clinical effectiveness of reformed nonperforating trabeculectomy (NPT) in the patients with primary glaucoma.METHODS: 30 eyes of 21 patients with primary glaucoma patients underwent reformed NPT, in which 1.0mm3.0mm out layer of trabecular meshwork with Schlemm's canal was excised, but the innermost tissue was reserved. The clinical effectiveness was observed with short-term follow-up (1wk;1,6mo) and the long-term follow-up (1a and over, 10a the longest).RESULTS: The intraocular pressure (IOP) was controlled in 28 eyes (93%) without anti-glaucoma medicine during short-term follow-up, and in 27 eyes (90%)for long-term ones. There were no serious post-operative complications in all cases.CONCLUSION: The elevated IOP in patients with primary glaucoma can be effectively reduced by reformed NPT during short-term and long-term follow-up. The post-operative complications are much less because of no intra-operative penetration of the anterior chamber. The reformed NPT is an ideal surgical procedure for primary glaucoma.
ABSTRACT
Many surgeons have noted that when the visual field is markedly constricted, immediate and permanent loss of central vision may follow otherwise successful glaucoma surgery. The present study was undertaken to assess the relative risk of surgical therapy in the loss of central vision in patients with advanced glaucoma. We reviewed the records of 44 eyes(including 8 macular split eyes) of 36 patients who had undergone trabeculectomy. The patients were followed for a minimum of 4 months with an average follow-up of 4.1 years. None of the patients suddenly lost visual field following surgery when central vision was spared at the time of the operation. There was good preservation of preoperative visual acuity except in 3 eyes which developed lens opacity. There was no progression of visual field loss when the intraocular pressure was controlled below 21 mmHg. There was good control of intraocular pressure in 43 out of 44 operated eyes. However, in one of the 2 reoperated eyes, we could not control the intraocular pressure below 21 mmHg.