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Limiting Cold Ischemia Time Reduces Organ Wastage

by Anjali Aryamvally on October 7, 2017 at 12:51 PM
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Limiting Cold Ischemia Time Reduces Organ Wastage

Highlights

• From 2008-2015, the number of kidneys donated after circulatory death that were obtained by the country's 58 donor service areas varied substantially.

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• The outcomes associated with these organs were generally excellent.

• The use of these organs could be increased if "cold ischemia times" are limited.

Donated organs that could be used to save lives are often discarded due to suboptimal conditions. Study suggests that these organs might be suitable for transplantation if certain steps are taken to limit damage following donation. The findings of the research team appear in an upcoming issue of the Journal of the American Society of Nephrology (JASN).
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In most cases in the United States, transplant organs come from donors following brain death, in which all the functions of the brain have stopped. Donation after circulatory death (DCD)--in which circulation, heartbeat, and breathing have stopped--has become increasingly more common, however, accounting for 17.7% of deceased donor kidney transplants in 2015 compared with only 7.3% in 2005. A DCD organ must be chilled after its blood supply has been cut off and then later warmed when its blood supply is restored. The process of restoring blood flow following this period of "cold ischemia" can lead to tissue damage.

To examine the contemporary use and outcomes of DCD kidneys for transplantation in the United States, John Gill, MD, MS (University of British Columbia and Vancouver's Providence Health Care) and his colleagues examined national data obtained between 2008 and 2015. The number of DCD kidneys recovered by the country's 58 donor service areas varied substantially (from 0 to 1072), and 25% of DCD kidneys were recovered in only 4 donor service areas. Overall, 20% of recovered DCD kidneys were discarded, varying from 3% to 33% among donor service areas.

DCD kidneys exhibited excellent organ survival, with a 5-year survival rate of 75%. Certain DCD kidneys were at higher risk of failing when compared with kidneys from brain dead donors, but only when the cold ischemia time was >12 hours.

"We found that use of DCD kidneys is variable throughout the United States, that the outcomes are generally excellent, and that the use of these organs could probably be safely increased if cold ischemia times are limited," said Dr. Gill.



Source: Eurekalert
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