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Donor, Recipient, and Operative Factors Associated With Increased Endothelial Cell Loss in the Cornea Preservation Time Study
Journal article   Open access   Peer reviewed

Donor, Recipient, and Operative Factors Associated With Increased Endothelial Cell Loss in the Cornea Preservation Time Study

Jonathan H Lass, Beth Ann Benetz, Sanjay V Patel, Loretta B Szczotka-Flynn, Robert O'Brien, Allison R Ayala, Maureen G Maguire, Yassine J Daoud, Mark A Greiner, Sadeer B Hannush, …
JAMA ophthalmology, Vol.137(2), pp.185-193
02/01/2019
DOI: 10.1001/jamaophthalmol.2018.5669
PMID: 30422157
url
https://doi.org/10.1001/jamaophthalmol.2018.5669View
Published (Version of record) Open Access

Abstract

Determining factors associated with endothelial cell loss after Descemet stripping automated endothelial keratoplasty (DSAEK) could improve long-term graft survival. To evaluate the associations of donor, recipient, and operative factors with endothelial cell density (ECD) 3 years after DSAEK in the Cornea Preservation Time Study. This cohort study was a secondary analysis of data collected in a multicenter, double-masked, randomized clinical trial. Forty US clinical sites with 70 surgeons participated, with donor corneas provided by 23 US eye banks. Individuals undergoing DSAEK for Fuchs dystrophy or pseudophakic/aphakic corneal edema were included. The DSAEK procedure, with random assignment of a donor cornea with a preservation time of 0 to 7 days or 8 to 14 days. Endothelial cell density at 3 years as determined by a reading center from eye bank and clinical specular or confocal central endothelial images. The study included 1090 participants (median age, 70 years) with 1330 affected eyes (240 bilateral cases [22.0%]), who underwent DSAEK for Fuchs dystrophy (1255 eyes [94.4%]) or pseudophakic/aphakic corneal edema (PACE) (75 eyes [5.6%]). Of these, 801 eyes (60.2%) belonged to women and 1207 (90.8%) to white individuals. A total of 749 participants (913 eyes; 164 [21.9%] bilateral cases) had functioning grafts with acceptable endothelial images preoperatively and at 3 years postoperatively and were included in this analysis. Factors associated with a lower ECD at 3 years (estimated effect with 99% CI) in the final multivariable model included donors with diabetes (-103 [-196 to -9] cells/mm2), lower screening ECD (-234 [-331 to -137] per 500 cells/mm2), recipient diagnosis of PACE (-257 [-483 to -31] in cells/mm2), and operative complications (-324 [-516 to -133] in cells/mm2). Endothelial cell loss (ECL) from a preoperative measurement to a 3-year postoperative measurement was 47% (99% CI, 42%-52%) for participants receiving tissue from donors with diabetes vs 43% (99% CI, 39%-48%) without diabetes; it was 53% (99% CI, 44%-62%) for participants diagnosed with PACE vs 44% (99% CI, 39%-49%) for those diagnosed with Fuchs dystrophy, and 55% (99% CI, 48%-63%) in participants who experienced operative complications vs 44% (99% CI, 39%-48%) in those who did not. No other donor, recipient, or operative factors were significantly associated with 3-year ECD. Donor diabetes, lower screening ECD, a PACE diagnosis in the recipient, and operative complications were associated with lower ECD at 3 years after DSAEK surgery and may be associated with long-term graft success. While causation cannot be inferred, further studies on the association of donor diabetes and PACE in recipients with lower 3-year ECD warrant further study.
 Time and Motion Studies Cornea Descemet Stripping Endothelial Keratoplasty Prospective Studies Double-Blind Method Fuchs' Endothelial Dystrophy - surgery Cell Count Humans Middle Aged Organ Preservation - methods Risk Factors Male Endothelium, Corneal - pathology Transplant Recipients Corneal Edema - surgery Adolescent Aged, 80 and over Graft Survival - physiology Adult Female Aged Tissue Donors Child Corneal Endothelial Cell Loss - diagnosis

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