Comparison of Long-term Clinical Outcomes between Descemet's Stripping Automated Endothelial Keratoplasty and Penetrating Keratoplasty in Patients with Bullous Keratopathy

• Published in: Korean journal of ophthalmology 2016, 30(6), , pp.443-450
• Main Authors: Kim, Sung Eun, Lim, Sung A, Byun, Yong-Soo, Joo, Choun-Ki
• Format: Article
• Language: English
• Subjects: Cornea - diagnostic imaging; Cornea - surgery; Corneal Diseases - diagnosis; Corneal Diseases - surgery; Descemet Stripping Endothelial Keratoplasty - methods; Female; Follow-Up Studies; Graft Survival; Humans; Keratoplasty, Penetrating - methods; Male; Middle Aged; Original; Refraction, Ocular; Retrospective Studies; Time Factors; Treatment Outcome; Visual Acuity; 안과학
• ISSN: 1011-8942; 2092-9382
• DOI: 10.3341/kjo.2016.30.6.443

To compare 2-year clinical outcomes of Descemet's stripping automated endothelial keratoplasty (DSAEK) and penetrating keratoplasty (PK) in patients with bullous keratopathy. A retrospective chart review was performed to obtain 2 years of follow-up data of DSAEK or PK at a single center from March 2009 to September 2012. The study comprised 15 eyes of DSAEK and 11 eyes of PK. Outcome measures included best-corrected visual acuity (BCVA), spherical and keratometric changes, central corneal thickness, endothelial cell density, intraocular pressure, and postoperative complications. Graft survival rate was assessed by Kaplan-Meier survival analysis. There were no differences in patient baseline characteristics between the two groups. At postoperative 2 years, better BCVA of 0.69 ± 0.51 logarithm of the minimum angle of resolution (logMAR) was found after DSAEK compared to 0.88 ± 0.48 logMAR after PK. Refractive cylinder in DSAEK and PK was -2.60 ± 1.53 and -6.00 ± 1.05 diopters (D), respectively, and keratometric cylinder was 3.27 ± 3.70 and 6.34 ± 3.51 D, respectively, at postoperative 2 years. The difference of mean spherical equivalents between postoperative 1 month and 2 years was 0.84 D after DSAEK and 2.05 D after PK. A hyperopic shift of 1.17 D was present after 2 years of DSAEK. The mean endothelial cell density at postoperative 2 years was 1,548 ± 456 cells/mm for DSAEK and 1,052 ± 567 cells/mm for PK, with a cell loss of 19.96% vs. 52.38%, respectively when compared to postoperative 1 month. No significant difference in central corneal thickness was found between DSAEK and PK (592 ± 75 vs. 563 ± 90 µm, respectively). Finally, the 2-year survival rate did not differ significantly between DSAEK and PK (93.3% vs. 81.8%, respectively, = 0.344). Compared to PK, DSAEK provided more stable refractive errors with better visual outcome, lower endothelial cell loss, and a lower rate of graft rejection at postoperative 2 years in patients with bullous keratopathy.