The rapid decay of organs is one of the biggest problems bedeviling organ transplants for people. From the moment a human heart or lung is disconnected from a donor, doctors have 4 to 6 hours to get it hooked up to a new patient’s blood supply before it is irretrievably damaged. For a liver, the window is 8 to 12 hours. For a kidney it’s about 1 day.
The effort to cut the warm ischemic time between organ removal and successful implantation has transformed the legal landscape for organ transplantation.
- It was one of the reasons for the development of "brain death" in 1968 -- waiting around for a patient with no brain function to lose all cardiopulmonary function often led to the loss of organs that start to deteriorate while still in the patient's body. It may not have been "a driving force" behind the 1968 recommendation of a Harvard Ad Hoc Committee, but it surely benefited the transplant industry and certainly escaped nobody's attention at the time. The 1968 recommendation was crucial to the development of the Uniform Determination of Death Act.
- It was the reason for widespread adoption of UNOS policy and hospital protocols for "Donation After Cardiac [or "Cardiopulmonary" or "Cardiac and Circulatory" or "Controlled Cardiocirculatory"] Death" ("DCD" or "DCCD"). Careful timing and choreography of the removal of life support, determination of death, and organ retrieval can reduce warm ischemic time dramatically. No new law was needed to make this legal, but DCD provoked a vigorous debate about a practice that involved inducing death, withholding life-saving and life-supporting measures, and deeming a patient to be dead while autoresuscitation might still be possible (multiple citations are available on PubMed; here's one).