Xen implantation in patients with primary open-angle glaucoma: comparison of two different techniques
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ORIGINAL PAPER
Xen implantation in patients with primary open-angle glaucoma: comparison of two different techniques Fikret Ucar
. Servet Cetinkaya
Received: 2 November 2019 / Accepted: 15 May 2020 Ó Springer Nature B.V. 2020
Abstract Purpose To compare retrospectively two different techniques of Xen implantation, which are transconjunctival (ab-externo) and standard (ab-interno) techniques. Methods Forty-three eyes of 43 patients with primary open-angle glaucoma (POAG) who had Xen implantation operation via transconjunctival (ab-externo) technique comprised Group 1. Of the 43 patients, 20 (46.5%) were males and 23 (53.5%) were females. Their mean age was 61.76 ± 8.81 (41–74) years. Forty-four eyes of 44 patients with POAG who had Xen implantation operation via standard (abinterno) technique comprised Group 2. Of the 44 patients, 21 (47.7%) were males and 23 (52.3%) were females. The mean age of this group was 63.80 ± 9.78 (38–75) years. Results Regarding age and sex, there were no significant differences between the groups (p [ 0.05). The mean postoperative 1st day, 1st week, 1st month, 3rd month, 6th month, and 12th month IOPs were significantly lower than the mean preoperative IOP in both groups (p \ 0.05). The mean number of anti-glaucomatous agents used postoperatively was significantly lower than the mean preoperative number for both groups (p \ 0.05). There was a F. Ucar (&) S. Cetinkaya Konyagoz Eye Hospital, Sancak Mah. Unluer Sok. No:13, 42000 Selcuklu, Konya, Turkey e-mail: [email protected]
significantly smaller need for needling in the transconjunctival group (p \ 0.05). Conclusion Xen implantation is a safe and effective method of reducing IOP and anti-glaucomatous dependence. Potential postoperative complications can be resolved easily. There were no significant differences between the standard method and the transconjunctival method in respect of IOP and re-use of anti-glaucomatous agents. However, there was a significantly smaller need for needling in the transconjunctival group. We recommend further studies to investigate long-term results. Keywords Xen implantation Transconjunctival (ab-externo) technique Standard (ab-interno) technique IOP
Introduction Glaucoma is one of the most important causes of blindness. Glaucoma causes atrophy of optic nerve fibers, leading to painless and progressive optic neuropathy and visual field defects. Severe visual loss is seen in untreated glaucoma patients [1]. Lowering intraocular pressure (IOP) prevents the progression of glaucoma and inhibits visual field losses [2–4]. Glaucoma is treated with drugs, laser therapy, and surgical interventions [5]. In recent years, the choices
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of laser and surgical therapy have increased. Shunt equipment is used in addition to trabeculectomy and laser trabeculoplasty [6, 7]. Trabeculectomy and shunt surgeries can cause several complications, such as hypotonus, leakage, shallow anterior chamber, choroidal effusion, encapsulation, tube blocka
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