Intermediate outcomes of ab externo circumferential trabeculotomy and canaloplasty in POAG patients with prior incisiona
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RESEARCH ARTICLE
Open Access
Intermediate outcomes of ab externo circumferential trabeculotomy and canaloplasty in POAG patients with prior incisional glaucoma surgery Huaizhou Wang1†, Chen Xin1†, Ying Han2, Yan Shi1, Sarah Ziaei2 and Ningli Wang1*
Abstract Background: To compare the efficacy and safety of ab externo circumferential trabeculotomy (ECT) and canaloplasty on primary open angle glaucoma (POAG) patients with failed filtering surgery and intact schlemm’s canal (SC). Methods: We conducted a retrospective chart review of POAG patients with failed filtering surgery and intact SC, who further received ECT and canaloplasty. The primary outcome measures were intraocular pressure (IOP) and the number of topical medications at each follow-up point. The secondary outcome compared the quantified success rate at1-year follow-up between the groups. Results: Twenty-nine eyes were recruited in the ECT group and 19 eyes in canaloplasty group. The postoperative IOP and the number of topical medications decreased significantly in both groups (p < 0.001). The IOP at 3-month and 6-monthwas significantly lower in the ECT group (p = 0.039, p = 0.001) than in the canaloplasty group. Although the IOP at 12-mon was similar between the two groups, the number of topical medications was less in the ECT group (p = 0.040). Hyphema (72.4%) and ciliary body detachment (27.6%), which mainly resolve spontaneously, were two leading complications in the ECT group. The prevalence of hyphema was higher in ECT than in canaloplasty group (p < 0.001). Conclusion: For POAG with failed filtering surgery and intact SC, canaloplasty may be safer, whereas ECT presented better IOP control. Translational Relevance: Suggestions for surgical choice for POAG with failed filtering surgery. Keywords: Ab externo circumferential trabeculotomy, Canaloplasty, Primary open angle glaucoma, Failed filtering glaucoma surgery
* Correspondence: [email protected] † Huaizhou Wang and Chen Xin contributed equally to this work. 1 Beijing Tongren Eye center, Beijing Tongren Hospital, Capital medical university, Beijing, China Full list of author information is available at the end of the article © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative
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