David J Browning,1 Chong Lee,1 Michael W Stewart,2 Maurice B Landers III3
1Charlotte Eye, Ear, Nose and Throat Associates, Charlotte, NC, 2Mayo Clinic, Jacksonville, FL, 3Kittner Eye Center, University of North Carolina, Chapel Hill, NC, USA
Purpose: To determine the effect of vitrectomy for center-involved diabetic macular edema (CI-DME).
Methods: This was a retrospective study of 53 eyes of 45 patients who had vitrectomy for CI-DME and were followed up for at least 12 months. Charts were reviewed for visual acuity (VA), central subfield mean thickness measured by optical coherence tomography, presurgical and postsurgical interventions for CI-DME, and number of office visits in the first 12 months after surgery. Preoperative spectral domain optical coherence tomography was performed on 38 patients, and they were graded for ellipsoid zone (EZ) intactness by three independent graders with assessment of agreement between graders using intraclass correlation coefficients and Bland–Altman analysis.
Results: The median VA improved from 20/100 (interquartile range [IQR], 20/63–20/200) at baseline to 20/63 (IQR, 20/32–20/125) at 12 months. The median central subfield mean thickness improved from 505 µm (IQR, 389–597 µm) at baseline to 279 µm (IQR, 246–339 µm) at 12 months. Intergrader agreement for EZ intactness was moderate (intraclass correlation coefficients 0.4294–0.6356). There was no relationship between preoperative intactness of the EZ and the 12-month change in VA.
Conclusion: Vitrectomy consistently thins the macula in CI-DME and, on average, leads to clinically significant improvement in VA comparable in size to that reported with serial intravitreal anti-vascular endothelial growth factor injections. A large, comparative, prospective, randomized clinical trial of these two treatments is needed to determine which is more effective and cost-effective.
Keywords: center-involved diabetic macular edema, diabetic macular edema, vitrectomy, spectral domain OCT
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Vitrectomy for center-involved diabetic macular edema
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Αλέξανδρος Γ. Σφακιανάκης Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00302841026182,0030693260717...
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