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Descemet-Stripping Endothelial Keratoplasty: Survival Outcomes in Eyes with Pre-existing Glaucoma. e - Poster. Descemet -Stripping Endothelial Keratoplasty :Survival Outcomes in Eyes with Pre-existing Glaucoma. Arundhati Anshu,MD; Marianne O. Price, PhD; Francis W. Price, MD.

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  1. Descemet-Stripping Endothelial Keratoplasty: Survival Outcomes in Eyes with Pre-existing Glaucoma e-Poster Descemet -Stripping Endothelial Keratoplasty :Survival Outcomes in Eyes with Pre-existing Glaucoma Arundhati Anshu,MD; Marianne O. Price, PhD;Francis W. Price, MD. *Dr. Francis W. Price receives travel grants from Moria. PriceVisionGroup & CorneaResearch Foundationof America

  2. Introduction There is complex interaction between factors influencing outcomes of corneal transplants and glaucoma management. Glaucoma is recognized as a risk factor for penetrating keratoplasty failure, and conversely, grafts are a risk factor for both the development and deterioration of glaucoma. The Australian Corneal Graft registry and several other large series have reported that glaucoma and/or glaucoma surgery is associated with increased risk of graft failure in full thickness corneal transplants. e-Poster Descemet -Stripping Endothelial Keratoplasty :Survival Outcomes in Eyes with Pre-existing Glaucoma Descemet stripping endothelial automated keratoplasty (DSAEK), has been widely adopted for the treatment of endothelial disorders. DSAEK in eyes with trabeculectomy and shunt devices can be technically challenging and requires technique modifications to achieve good outcomes. While the long-term survival of PKs in these high-risk eyes is less than favorable, the same is not known for DSAEK. PriceVisionGroup & CorneaResearch Foundationof America

  3. Purpose To evaluate long-term survival outcomes of DSAEK in eyes with pre-existing glaucoma. e-Poster Descemet -Stripping Endothelial Keratoplasty :Survival Outcomes in Eyes with Pre-existing Glaucoma PriceVisionGroup & CorneaResearch Foundationof America

  4. Materials and Methods • A retrospective interventional case series Inclusion and Exclusion Criteria: e-Poster • Patients undergoing their first DSAEK for endothelial dysfunction. • Regrafts and eyes that developed glaucoma or underwent glaucoma surgery after DSAEK were excluded from the survival analysis Descemet -Stripping Endothelial Keratoplasty: Survival Outcomes in Eyes with Pre-existing Glaucoma Parameters Evaluated • Presence or absence of pre-existing glaucoma • Type of glaucoma surgery • Graft survival in eyes with and without glaucoma • Graft survival in eyes with glaucoma surgery • The cumulative probability of graft survival was calculated using Kaplan-Meier survival analysis and log rank test. PriceVisionGroup & CorneaResearch Foundationof America

  5. Results 1 Demographics e-Poster • N = 350 consecutive eyes • Mean age: 69 years (S.D – 12; Range – 22-94 years) • Female:Male::241:109 • Pre-operative diagnosis: Fuchs endothelial dystrophy (314, 90%) and corneal edema from other causes (36, 10%) • Eyes with pre-existing glaucoma: 45 (12.5%) • Eyes with prior glaucoma surgery: 13 (Trabeculectomy – 5; Shunt procedure – 8) Descemet -Stripping Endothelial Keratoplasty: Survival Outcomes in Eyes with Pre-existing Glaucoma PriceVisionGroup & CorneaResearch Foundationof America

  6. Results 2 Graft failure rates e-Poster • Overall, 12/335 eyes without prior glaucoma surgery failed (3.5%) • 2 of 5 eyes with a prior trabeculectomy failed (40%) • 5 of 8 eyes with a prior shunt procedure failed (63%) Descemet -Stripping Endothelial Keratoplasty: Survival Outcomes in Eyes with Pre-existing Glaucoma PriceVisionGroup & CorneaResearch Foundationof America

  7. Results 3 Graft survival –medically managed glaucoma e-Poster • Kaplan-Meier survival analysis showed that the overall graft survival at 1, 2, 3, 4 and 5 years was 98%, 97%, 95%, 94%, and 93% respectively. • Graft survival in eyes with medically managed glaucoma was 100%, 96%, 96%, 91% and 91% at 1, 2, 3, 4 and 5 years respectively and this was not statistically significant (P=0.48) as seen in Figure 1 below. Descemet -Stripping Endothelial Keratoplasty :Survival Outcomes in Eyes with Pre-existing Glaucoma Figure 1 PriceVisionGroup & CorneaResearch Foundationof America

  8. Results 4 Graft survival – eyes with shunt surgery e-Poster In eyes with pre-existing shunt surgery, graft survival was 100% at 1 year, 84% at 2 years, 76% at 3 years, 56% at 4 years and 30% at 5 years and this was statistically significant when compared to eyes without prior shunt surgery (p<0.0001) as depicted in Figure 2. Descemet -Stripping Endothelial Keratoplasty : Survival Outcomes in Eyes with Pre-existing Glaucoma Figure 2 PriceVisionGroup & CorneaResearch Foundationof America

  9. Discussion and conclusion • In eyes undergoing a penetrating keratoplasty (PK), it has been well documented that glaucoma surgery affects graft survival adversely. Glaucoma surgery generally indicates more severe glaucoma and a failure of medical therapy, and issues such as anterior chamber shallowing, and increased inflammation are all prejudicial to graft survival. • Trabeculectomy is accompanied by the use of antimetabolites that are toxic to the corneal endothelium, which, combined with the known decrease in endothelial cell density after intraocular surgery, could predispose to endothelial failure. It has been demonstrated in previous studies that the blood– aqueous barrier is transiently disrupted after trabeculectomy leading to increased immune-modulatory and/or inflammatory molecules in the anterior chamber that could cause graft rejection and failure. e-Poster Descemet -Stripping Endothelial Keratoplasty: Survival Outcomes in Eyes with Pre-existing Glaucoma PriceVisionGroup & CorneaResearch Foundationof America

  10. Discussion and conclusion • Disruption of the blood–aqueous barrier is also produced by tube-shunt devices, and this could lead to an increased rate of rejection and hence graft failure. • Drainage tube implants may damage the corneal endothelium by mechanical means or by permitting retrograde entrance of inflammatory cells into the anterior chamber, and increasing the risk of rejection and hence graft failure. • The results of this study show that similar to PK, glaucoma surgery was a significantly negative predictor of graft survival in eyes undergoing DSAEK, with the cumulative 5-year graft survival in eyes with prior glaucoma surgery being 30% compared to 93% in eyes without glaucoma surgery (p<0.0001). e-Poster Descemet -Stripping Endothelial Keratoplasty :Survival Outcomes in Eyes with Pre-existing Glaucoma PriceVisionGroup & CorneaResearch Foundationof America

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