Publication: Medium-term outcomes of Boston type 1 keratoprosthesis implantation in Bangkok, Thailand
Issued Date
2014-01-01
Resource Type
ISSN
15364798
02773740
02773740
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2-s2.0-84927614619
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Mahidol University
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SCOPUS
Bibliographic Citation
Cornea. Vol.33, No.12 (2014), 1312-1319
Suggested Citation
Kaevalin Lekhanont, Panyachat Thaweesit, Dittapol Muntham, Varintorn Chuckpaiwong, Anun Vongthongsri Medium-term outcomes of Boston type 1 keratoprosthesis implantation in Bangkok, Thailand. Cornea. Vol.33, No.12 (2014), 1312-1319. doi:10.1097/ICO.0000000000000265 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/34448
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Title
Medium-term outcomes of Boston type 1 keratoprosthesis implantation in Bangkok, Thailand
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Abstract
Copyright © 2014 by Lippincott Williams & Wilkins. Purpose: The aim of this study was to investigate the medium-term outcomes after Boston type 1 keratoprosthesis surgery in patients with poor prognosis for standard keratoplasty. Methods: A prospective study of a case series was conducted at a university-based referral center from 2006 to 2013. Forty-two eyes of 40 patients with a minimum follow-up of 4 years were recruited. The main outcome measures included best spectacle-corrected visual acuity (BSCVA), keratoprosthesis retention, and complications. Results: The mean follow-up was 64.9 ± 15.2 months (range, 48-88 months). At 1 week, 90.5% had an improvement in BSCVA by ≥2 lines compared with that in preoperative BSCVA. The best-ever vision was reached by the end of 6 months. Nevertheless, 39.5% (15/38) could not maintain the improved vision. The major etiology of visual deterioration after initial gains was glaucoma (60%). The initial keratoprosthesis retention rate was 80.9%, corresponding to a failure rate of 4 per 100 eye-years or 0.04/eye-year. Autoimmune diagnosis was the independent risk factor for keratoprosthesis failure (hazard ratio, 5.68; 95% confidence interval, 1.41-22.85; P = 0.014). The common postoperative complications were glaucoma, retroprosthetic membrane, corneal melting, infectious keratitis, and endophthalmitis. Conclusions: Boston type 1 keratoprosthesis is an alternative for patients who are not candidates for corneal transplants. However, there was a trend toward visual loss over time most commonly because of progressive glaucoma. Therefore, appropriate patient selection, lifelong follow-up, and early aggressive treatment of complications are recommended.