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  • Title: Study of death to preservation time and its impact on utilisation of donor corneas.
    Author: Patel D, Tandon R, Ganger A, Vij A, Lalwani S, Kumar A.
    Journal: Trop Doct; 2017 Oct; 47(4):365-370. PubMed ID: 28610538.
    Abstract:
    To evaluate the impact of death-to-preservation time (DPT) on effective utilisation of donor corneas. In a prospective observational study conducted at our tertiary eye centre, donated corneas received over a 15-month period from November 2011 to January 2013 were evaluated. Donor age, donor refrigeration (done or not), DPT, endothelial cell density (ECD), corneal grading, clinical utilisation and surgical outcome after graft transplantation were noted. To analyse the impact of different DPT on donor cornea transplantation, primary outcome measures (corneal grading and endothelial cell density) and secondary outcome measures (primary graft failure and graft infection) were analysed. A total of 990 corneas were assessed. Primary outcomes showed no significant difference for higher DPT ( P > 0.01). ECD, where DPT was >12 h, was better for refrigerated corneas ( P < 0.001). Prolonged DPT had no significant effect on primary graft failure ( P = 0.131) and graft infection ( P = 0.137) in the first month after transplantation. We find that DPT should not be the only criteria to assess the cornea quality; other donor characteristics should be considered equally important. Donor refrigeration should be encouraged in cases where early retrieval is not possible.
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