ESCRS - PO398 - Canaloplasty Ab Interno (Abic) - 3-Year-Results Of A Novel Minimally Invasive Glaucoma Surgery (Migs) Technique

Canaloplasty Ab Interno (Abic) - 3-Year-Results Of A Novel Minimally Invasive Glaucoma Surgery (Migs) Technique

Published 2022 - 40th Congress of the ESCRS

Reference: PO398 | Type: Free paper | DOI: 10.82333/8kq7-7695

Authors: Maya Mueller* 1 , Sara Kazerounian 2 , Martin Loertscher 3 , Michael Zimbelmann 4

1IROC,Zuerich,Switzerland, 2Augenzentrum Kiener,5405 Baden,Switzerland, 3Pallas Kliniken Aarau,Aarau,Switzerland, 4Department of Ophthalmology,Augenklinik Luebeck,Luebeck,Germany

Purpose

Ab interno Canaloplasty (ABiC) is the only minimally invasive glaucoma surgery technique (MIGS) without a remaining implant. The aim of this study is to evaluate the long-term efficacy of this new surgical technique.

Setting

Study Design: Retrospective study.

Methods

For this retrospective cohort study, the data of 25 eyes of 23 patients with open angle glaucoma were analysed, who underwent ABiC (6 eyes) or in case of an additional cataract, a combined cataract-ABiC procedure ("phacocanaloplasty ab interno", 19 eyes), respectively. Postoperatively the intraocular pressure (IOP) and the number of still required IOP-lowering medication, as well as surgery-related complications were investigated.

Results

Overall, the mean baseline IOP (mmHg) of 20.24±5.92 (n=25) was reduced to 10.64±2.77 (n=25, p<0.001), 12.55±3.33 (n=22, p<0.001) and 13.67±2.15 (n=21, p<0.001) and 12.17±2.2 (n=18, p<0,001) at 1 day, 1 year, 2 year and 3 year follow-up visit, respectively. Compared to baseline, this implies a reduction in IOP of 47.4, 37.9, 32.5 and 39,9%. An average glaucoma medication usage of 1.92±1.04 was registered at baseline visit and was reduced to 0,05±0,23 after 3 years. 80% of patients were off medication after 3 years. In 5 eyes (20%) antiglaucomatous eye drops or surgical treatment were administered. Surgical complications were hyphema in 5 eyes (20%) and a peripheral detachment of the Descemet's membrane in one eye (4%) with no late sequelae.

Conclusions

ABiC performed independently or combined with cataract surgery proved as a safe and effective MIGS-technique with good long-term reduction of IOP and low risk profile.