The United States has approved its first national policy for a controversial organ retrieval procedure that restarts blood flow in donors after they have been declared dead. The new guidelines, approved by the Organ Procurement and Transplantation Network (OPTN) on November 6, aim to standardize the use of normothermic regional perfusion (NRP) while addressing long-standing ethical concerns.
The policy takes effect on December 6. It introduces specific safeguards for donors, including requirements to cut holes in blood vessels leading to the head to prevent any possibility of blood reaching the brain. Despite these measures, bioethicists and some transplant surgeons argue the guidelines fail to resolve fundamental ethical issues regarding the definition of death.
Normothermic Regional Perfusion Procedure
NRP is used after a family has decided to withdraw life support for a patient with no hope of recovery. The procedure involves attaching an external pump to the donor minutes after circulation has stopped. This pump restores blood flow to the heart, lungs, kidneys, and liver to keep the organs from deteriorating before they can be transplanted.
Dr. Raymond Lynch, director of transplantation at the Health Resources & Services Administration (HRSA), stated that the goal of NRP is to increase both the supply and quality of organs available for transplant. The need is urgent. More than 109,000 Americans are currently waiting for an organ transplant, and approximately 12 people die every day due to the shortage.
The new guidelines mandate that surgeons must not only clamp the blood vessels supplying the brain but also vent them by cutting holes above the clamping site. Lynch explained that this second safeguard ensures that if clamping is insufficient, warm oxygenated blood cannot reach the brain.
Ethical Concerns and the Dead Donor Rule
Critics argue that NRP violates the Dead Donor Rule, a foundational principle in transplant medicine. This rule states that organs can only be taken from patients who are already dead, either from brain death or circulatory death. Because NRP restarts circulation, opponents claim it reverses the condition of death upon which the donor was declared.
Dr. Lainie Friedman Ross, a bioethicist at the University of Rochester, expressed strong opposition to the procedure. She noted that by definition, a person declared dead by circulatory criteria should not have circulation reestablished. “I think it violates the dead donor rule. It is taking organs from people who are no longer dead,” Ross said.
Further concerns arose when organ retrieval teams reported signs of life in donors during NRP cases. Dr. Claire Morgan, a transplant surgeon, was the first to report these incidents to HRSA. She described seeing signs of life when the brain was reperfused, calling the phenomenon extremely disturbing. These reports prompted the OPTN to investigate and develop the current response.
The new policy also recommends against administering drugs that would paralyze donors and mask any physical movements. However, critics like Dr. Morgan argue that most surgeons already clamp and vent blood vessels, meaning the new rules do not add significant protection. She also criticized the decision to implement the guidelines on an emergency basis without public comment.
Implementation and Future Debate
Dr. Matthew DeCamp, a bioethicist at the University of Colorado, described the policy as putting the cart before the horse. He argued that the fundamental ethical issues surrounding NRP remain unresolved and that the adoption of these guidelines could accelerate the use of the procedure before those questions are fully addressed.
Lynch maintains that the guidelines protect donors while ensuring that life-saving care is available. He emphasized that if performed correctly, the procedure is safe and will improve outcomes for patients on the transplant waiting list. The OPTN board approved the first phase of these uniform national guidelines to bring consistency to a practice that has varied across different transplant centers.
Source: NPR
