The previous AAN guidelines, released in 2010, did not mandate tests for complete cessation of brain function beyond what can be diagnosed bedside, such as an electroencephalogram.
Further, AAN’s 2023 guidelines, announced in October, state that neuroendocrine function can persist in patients with permanent injury to the brain and “is not inconsistent with the whole brain standard of death.” The signers of the February statement note that AAN’s guidelines are “commonly accepted criteria for determinations of BD throughout the United States and are considered the most rigorous and comprehensive.”
When similar guidelines were introduced last year, the bishops of the United States weighed in, expressing concern that the rewrite “would replace the standard of whole brain death with one of partial brain death.”
“Nothing in Catholic teaching provides support for lowering the criterion to something less than ‘irreversible cessation of all functions of the entire brain,’” the bishops wrote.
“We are opposed to lowering that standard in the absence of compelling scientific evidence.”
The Catholic view
While the term “brain death” is not found in the Catechism of the Catholic Church, Pope John Paul II asserted in 2000 that, if properly diagnosed, the complete and irreversible cessation of all brain function seems a valid way to assess with “moral certainty” that a person has died. Moral certainty, the saint said, “is considered the necessary and sufficient basis for an ethically correct course of action.”
Catholic doctors and ethicists today largely echo the former pontiff in stating that brain death, when properly diagnosed, is not a “kind” of death; it is simply death, period.
However, brain death remains a hotly debated topic among some Catholic medical professionals and ethicists, partly because brain-dead donors are, today, the primary source of organ transplants. Organs such as the heart, lungs, and pancreas can be — and are routinely — harvested from brain-dead donors as close to the time of death as possible.
In his 2000 address, John Paul II stressed the importance of only removing organs from people who have definitively died. The pope’s speech built upon his writing in the 1995 encyclical Evangelium Vitae in which he decried any practice whereby “organs are removed without respecting objective and adequate criteria which verify the death of the donor,” calling such a practice a form of “furtive … euthanasia.”
The United States Conference of Catholic Bishops, in its 2018 Ethical and Religious Directives for Catholic Health Care Services, states that the “determination of death should be made by the physician or competent medical authority in accordance with responsible and commonly accepted scientific criteria.”
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