Descemet Membrane Endothelial Keratoplasty as a Secondary Approach After Failure of Penetrating Keratoplasty

摘要

Objectives: To investigate visual outcome and postoperative complications in patients undergoing Descemet membrane endothelial keratoplasty with graft failure after penetrating keratoplasty. Materials and Methods: A retrospective analysis was performed with 5 patients who underwent Descemet membrane endothelial keratoplasty after failed penetrating keratoplasty. Intraoperative and postoperative complications were recorded. Visual acuity, rehabilitation phase, refraction stability, central corneal thickness, endothelial cell count, possible immunologic reactions, and optical coherence tomography of the anterior eye segment were evaluated. A subjective questionnaire was used to evaluate patient satisfaction. Results: There were no intraoperative complications. All patients had graft detachment, which made air injection necessary. In all cases, visual acuity sig-nificantly increased (medium visual acuity [logarithm of the minimum angle of resolution]: 0.68 ± 0.31 logarithm of the minimum angle of resolution after 4 weeks and 0.35 ± 0.37 after 6 months; P = .043), refraction was stable, corneal thickness was reduced (average, 514 ± 11 μm), and endothelial cell count was reduced (average, 1398 ± 510 cells/mm2) after 6 months, which corresponds with a medium loss 40%. In the questionnaire, visual outcome, estimated time for recovery, and rehabilitation and patient satisfaction were better after Descemet membrane endothelial keratoplasty than penetrating kerato-plasty. No postoperative elevation of pressure, development of pupillary block, or graft rejection, and no peripheral anterior synechiae or other abnormalities were observed with optical coherence tomography during the first 6 postoperative months. Conclusions : Descemet membrane endothelial keratoplasty is a suitable technique for the treatment of graft failure after penetrating keratoplasty and helped our patients rapidly achieve good visual acuity, with reduction of postoperative complications, but the visual outcome might be limited.