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S. Lee, M. Kim, J. Heo, S. Ahn, J. Ko, H. Lee, M. Shin, M. Lee, W. Wee, J. Lee; Preliminary Outcomes of Endoscopic Vitrectomy for Exchange of Seoul-Type Keratoprosthesis in Rabbit Model. Invest. Ophthalmol. Vis. Sci. 2007;48(13):1890.
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© ARVO (1962-2015); The Authors (2016-present)
Long cylinder of Seoul-type keratoprosthesis (S-KPro) limits adequate views for vitrectomy. It limits the management of retinal detachment after exchange of S-KPro. We investigated the usefulness of endoscopic vitrectomy in exchange of S-KPro.
This study was approved by the Institutional Animal Care and Use Committee of the Seoul National University Hospital, and also performed according to ARVO Statement for the Use of Animals in Ophthalmic and Vision Research. 6 S-KPro implanted rabbit eyes for 4 weeks were enrolled for exchange of S-KPro. S-KPros were re-implanted in 3 eyes which had undergone conventional vitrectomy using Eckardt temporary keratoprosthesis after removal of previously installed S-KPro. Other three eyes underwent vitrectomy using endoscopic system(E2 MicroProbeTM, EndoOptics®, USA) prior to SKPro removal and then S-KPro re-implanted. All eyes were evaluated with slit-lamp and ultrasonography weekly.
Vitreous traction and adhesive membranes surrounding the prolene haptics in ora serrata were found and were precisely excised through the endoscopic view. Two eyes with endoscopic vitrectomy show the retina has been flat till mean follow-up of 10 weeks, but 1 eye developed superiorly localized retinal detachment immediately after exchange because of a preexisting silent hole, but did not progressed for 4 weeks. No anterior segment complication nor endophthalmitis was developed during the follow up period. While, total retinal detachment was developed immediately after exchange of S-KPro in all 3 conventional vitrectomized eyes using Eckardt temporary keratoprosthesis.
Endoscopic vitrectomy might be helpful to exchange S-KPro safely by removing traction near the ora serrata successfully.
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