Trabecular micro-bypass stent implantation during small-incision cataract surgery for open-angle glaucoma or ocular hypertension: Long-term results.

Abstract

PURPOSE To evaluate long-term safety and efficacy of iStent trabecular micro-bypass stent implantation during cataract surgery in patients with primary open-angle, pseudo-exfoliation glaucoma, ocular hypertension, or secondary or post-traumatic glaucoma. SETTING AaM Augenklinik am Marienplatz, Munich, Germany. DESIGN Prospective, open-label, non-randomized study. METHODS Preoperative and postoperative evaluations included intra-ocular pressure (IOP), topical ocular hypotensive medication use, cup/disc ratio, corrected-distance visual acuity (CDVA), complications, and adverse events. RESULTS A single trabecular micro-bypass stent was implanted through the same temporal, limbal incision used for cataract surgery via phacoemulsification in a consecutive series of 62 eyes of 43 patients. To date, a total of 41 eyes have been followed for 3 years postoperatively, whereas long-term postoperative follow-up on the remaining patients is ongoing. Mean preoperative IOP was 24.1 ± 6.9 mm Hg on a mean of 1.8 medications (±0.9). Analyses of eyes with no secondary surgical intervention showed mean IOP reduction to 14.8 ± 4.2 mm Hg at 12 months (n = 61), 14.5 ± 2.2 mm Hg at 24 months (n = 42), and 14.9 ± 2.3 mm Hg at 36 months (n = 39). Medications were eliminated in 74% of eyes at 36 months. Five eyes, 4 with previous glaucoma surgeries and 1 with pseudo-exfoliation syndrome, required additional glaucoma surgery after stent implantation. No intra-operative or postoperative complications typically seen with conventional glaucoma surgeries occurred after stent implantation. At 36 months, CDVA was 20/40 or better in 38 eyes (93%). CONCLUSION Trabecular micro-bypass stent implantation during cataract surgery was safe and effective in patients with ocular hypertension or glaucoma as measured by a sustained reduction in IOP and medication use and an excellent safety profile through 3 years after surgery. FINANCIAL DISCLOSURES Dr. Neuhann has no financial or proprietary interest in any material or method mentioned. Glaukos Corp. provided editorial assistance in the preparation of the manuscript.

DOI: 10.1016/j.jcrs.2015.06.032

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@article{Neuhann2015TrabecularMS, title={Trabecular micro-bypass stent implantation during small-incision cataract surgery for open-angle glaucoma or ocular hypertension: Long-term results.}, author={Tobias H Neuhann}, journal={Journal of cataract and refractive surgery}, year={2015}, volume={41 12}, pages={2664-71} }