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Eye Banks (eye + bank)

Distribution by Scientific Domains

Medical Sciences	100%

Selected Abstracts

4332: Determination of corneal endothelial cell density in French eye banks: second look

ACTA OPHTHALMOLOGICA, Issue 2010
N DELESALLE
Purpose Considering the importance of having a precise, robust and especially reproducible ECD counting method, Afssaps organized from April 2008 to June 2009 a second assessment of the reliability of the routine cell count within the 18 french Eye banks. Methods The study design was similar to the first assessment driven by the laboratory ,Biology, engineering and imaging of Corneal Graft' in 2003 (Transplantation 2004; 78: 1299-1302).5 test corneas (1 mm2 of flat mounted, fixed and alizarin stained human corneal endothelium) were selected and sent to the 18 Eye banks. All the usual technicians of each bank had to count the test corneas using the routine method(s) employed to assess grafts. Results 430 counts were carried out by 70 eye banks technicians, by manual and/or image analysis system. 42% (180/430) deviated by more than 10% from the expected ECD. Among them, 128 were over-estimated (max +88%) and 52 were under-estimated (max -31%). 2 banks constantly over-estimated (in the mean +31,7% and +42,7%, no calibration and/or material problem) but the 16 other banks were in average within ±13% from expected ECDs. For manual methods, a statistically significant difference between banks was observed for the 5 test corneas, whereas no difference was observed with image analyzers. ECD obtained with the analysers were closer to expected values than with the manual methods. Compared to the 2003 study, reliability of ECD determination globally improved. Conclusion Image analysis systems prove more reliable (precise and with a lower intra and inter observer variability) than manual counting methods. This ,second look' of Eye banks will allow editing recommendations to improve ECD determination. [source]

4132: Factors influencing donor cornea utilization in a tertiary care centre: results from 5-year data

ACTA OPHTHALMOLOGICA, Issue 2010
P SANKARAN
Purpose To evaluate utilization of corneal tissue procured by the eye bank of a tertiary care centre in north India, to determine factors that were responsible for labeling corneas unsuitable for transplantation, and to identify methods to improve donor tissue utilization. Methods We retrospectively reviewed records from our eye bank from May 2005 to April 2010. We compared donor demographics, death- enucleation interval, and biologic contamination of utilized and non- utilized corneal tissues. Results 3951 corneas were received during the study period. Of these, 2561 donor corneas (65%) were used for surgical purposes. Of the 1390 corneas not utilized for transplantation, 703 corneas (50.6%) were excluded due to poor tissue quality. Other causes were logistical reasons, such as no suitable recipient, in 267 (19.2%), bacterial growth on culture in128 (9.2%), contraindication in the donor's medical history in 102(7.3%), and serological results in 83(6%). Mean age of donors in the utilized cornea group was 58.9 years (± 21.57 years) as compared to 67.52 years (± 19.82 years) in the non-utilized cornea group. The difference was statistically significant (P=0.000). Mean death-enucleation interval was comparable in the 2 groups (5.38 hours versus 4.62 hours; P=0.54). Conclusion Increase in age of donors results in poorer tissue quality and emerges as a significant factor in non,utilization of donor corneas for transplantation. [source]

Specific Unwillingness to Donate Eyes: The Impact of Disfigurement, Knowledge and Procurement on Corneal Donation

AMERICAN JOURNAL OF TRANSPLANTATION, Issue 3 2010
M. Lawlor
Although willingness, attitudes and beliefs surrounding solid-organ donation have been extensively investigated, much less is known about corneal donation. Despite evidence that a substantial number of families who agree to multiorgan donation also specifically refuse corneal donation, it is unclear why this occurs and what can be done to increase rates of corneal donation. We conducted a survey of 371 Australian adults regarding their views on corneal donation. Although willingness to donate corneas generally reflected a person's willingness to donate all of one's organs, unwillingness to donate corneas appeared to be due to other factors. Specifically, decisions not to donate appear to be driven by a range of concerns surrounding disfigurement. The survey also provides eye banks with reassurance about the acceptability of whole globe procurement, and recognition that research into blindness is a highly valued part of corneal donation. Finally, the survey identifies that many individuals see benefit in having their family engaged in the decision-making process, suggesting that decisions about donation are more complex than a simple appeal to the autonomy of the deceased. [source]