The Organ Donor Shortage
Since kidney transplantation in humans became successful over five decades ago, the number of patients needing kidney transplants has exceeded the supply of donor kidneys. As of July 2006, over 70,000 patients were awaiting kidney transplants in the United States. The number of patients awaiting transplantation has risen every year for the last 18 years - ever since statistics have been kept on the subject.
Kidneys come from donors who have died- deceased donors, or from living donors. Although the numbers of living donors and deceased donors have risen over the past several years, they have not kept pace with the numbers of patients needing kidney transplants.
As the number of patients who need kidneys continues to increase, waiting times for kidney transplants also increase. In the United States, the average wait for a kidney transplant is over three years.