Manuel—not his real name—was admitted to the hospital with decompensated heart failure. As a child he had scarlet fever which, left untreated, had caused the valves of his heart to calcify and stiffen. Over time, pumping against increased resistance, his heart’s contractions began to weaken until finally, they lost all synchrony and the normal function of his heart spiraled out of control. At this stage, his fate was tied to whether or not he would receive a new heart in time.
He was in his 30’s and had no other illnesses. From a medical perspective, Manuel was the ideal candidate for a cardiac transplant. But a decade ago Manuel crossed the United States border in pursuit of a better life. As an undocumented immigrant, he was ineligible for the insurance coverage necessary to pay for a heart transplant. After being thoroughly evaluated by the hospital’s transplant center, given his modest financial resources and inability to obtain new insurance coverage, Manuel was not placed on the waiting list for a new heart.
The average heart transplant costs about a million dollars to perform. Subsequent follow-up care adds another $30,000 annually. Health insurance will usually cover most, if not all, of these costs. But uninsured patients are kept off transplant lists on the grounds that the inability to pay for care allegedly jeopardizes an organ’s long-term success. Continue reading →
In January of this year, Cell published a study modestly titled, Interspecies Chimerism with Mammalian Pluripotent Stem Cells. It reports success bioengineering a mostly-pig partly-human embryo. One day before, Nature published a report that scientists had grown (for lack of a better word) a functioning genetically-mouse pancreas within the body of a genetically-modified rat. The latest study raises the likelihood that before long, it will also be scientifically possible to grow human organs within bioengineered pigs.
The implications for transplantation are tremendous. But hold the applause for now. Imagine a chimera with a brain made up of human neurons which expressed human genes. Would organ procurement without consent be okay? That troubling possibility raises questions about whether manufacturing chimeras with human-like properties for organs is even appropriate in the first place. Here’s what University of Montreal bioethicist Vardit Ravitsky told the Washington Post:
“I think the point of these papers is sort of a proof of principle, showing that what researchers intend to achieve with human-non-human chimeras might be possible … The more you can show that it stands to produce something that will actually save lives … the more we can demonstrate that the benefit is real, tangible and probable — overall it shifts the scale of risk-benefit assessment, potentially in favor of pursuing research and away from those concerns that are more philosophical and conceptual.”
I respectfully disagree. Saving more lives, of course, is good. Basic science is also valuable – even more so if it might translate to the bedside. This line of research, though, is positioned to upend our entire system of transplantation, and so its implications go beyond organ supply. In this post I will argue that to assess this technology’s implications for organ procurement in particular, there is good reason to focus on harms, not benefits. Continue reading →
In my last post I characterized how overdoses from the surging opioid epidemic have become the fastest-growing cause of mortality among organ donors. In this update, I raise one potential consequence with ethical and policy implications: so-called donor-derived infections. To be clear, I focus primarily on organ recipients as deaths from drug overdose, and drug addiction more broadly, should be prevented regardless of any implications for transplantation. With this in mind, consider how the population of injection drug users shoulders a heavy burden of HIV, hepatitis B (HBV) and hepatitis C (HCV) (Table 1). First I will focus on screening guidelines, and then will move on to transplantation of organs known to carry an infection.
Screening guidelines can help reduce the incidence of donor-derived infections, but the lab tests recommended in any policy must balance two potential concerns. First, lab tests have a rate of false negative results. Transplants of these organs will accidentally increase donor-derived infections. The policy question, then, is whether or not transplanting organs donated by individuals with higher risk of recent disease exposure will expose an unacceptable proportion of recipients to infection. This unintentional harm could undermine a duty of non-maleficence to organ recipients. Further complicating a potential screening policy is that the basic lab tests for HIV, HBV, and HCV detect the presence of human antibodies, which work well among a low-risk population, but antibodies might not appear in the blood until weeks after infection (Table 2).Recent infections are better detected by nucleic acid amplification (NAT) testing.To mitigate risk of infection,then, transplant screening policies should require a heightened level of surveillance among donors with a history of illicit drug use. Continue reading →
The surging opioid epidemic is a threat to the nation’s public health. This year the CDC reported that mortality from drug overdose reached an all-time high, with the annual death toll more than doubling since 2000. Yet in the backdrop of this epidemic, the country also faces ongoing shortages of a different sort–too few organs for transplantation. Every day, approximately 22 people die while waiting for an organ to become available. To some it is not a surprise–or at least not inconceivable–that the fastest-growing source of organ donors is being fueled by the national spike in drug overdoses. This first post will help delineate the scope and scale of the situation. My follow-up will discuss the ethical considerations and ramifications for public policy.
To start: the numbers. The Organ Procurement and Transplantation Network (OPTN) makes domestic transplant data publicly available online, which currently extends from 1994 to September 30th, 2016. Two decades ago, 29 organ donors died from a drug overdose.* In just the first nine months of this year, that number has climbed to 888 donors. Even with a quarter of the calendar year left to be counted, 2016 has already surpassed previous record set in 2015 (Figure 1).
One might question whether this trend is an illusion–perhaps a rise in the incidence of donors who had overdosed reflects an increasing number of transplants. But the data suggest the opposite. Also plotted in Figure 1, the percentage of total organ donors who died from overdose (maroon diamonds, right-sided Y axis) has not remained constant–instead, the percentage has steadily increased. Two decades ago, overdose caused the deaths of 0.6% of all organ donors; this year, it is the cause of death among 12.0% of organ donors nationwide. The rising percentage means that not only are more victims of drug overdose donating organs, but that the pool of organ donors is increasingly composed of such individuals. Continue reading →
Everyone interested in that area must read Shierts v. University of Minnesota Physicians, — N.W.2d — (Minn.App.2014), 2014 WL 7344014.
This important – yet, unreported – decision deals with a medical-malpractice action arising out of the patient’s death from cancer contracted from a donated pancreas. The trial court dismissed the action summarily based on the “proximate cause” doctrine, and the plaintiff appealed against that dismissal. Continue reading →
It astonishes me how many people do not realize the controversial nature of “brain death” and the fact that it is not the same as death. There is a substantial body of literature showing that brain death is not the equivalent of death. The President’s Council on Bioethics issued a white paper in 2008 acknowledging the deficiencies with our current approaches to determining death. The literature on the topic is fascinating—some brain dead individuals have gestated babies successfully to viability and gone through puberty. Many brain dead individuals can heal wounds, regulate their body temperatures, and persist on ventilators for many years. (If you are unfamiliar with this literature and want to read further, see the citations provided below.)
Frank Miller and I have argued that best the way to think about the status quo is that brain death is a status legal fiction, much like the legal construct that a corporation is a person. A corporation is similar enough to a person that it is convenient to treat corporations as persons under the law, rather than writing an entirely new body of law meant to apply to corporations alone. We have argued that brain death is similar to death—Frank Miller and Bob Truog express this by saying that a person who is brain dead is “as good as dead.” For this reason, we can ethically and legally treat the two states in the same way for the purposes of determining death and allowing vital organ transplantation.
There are many open and interesting questions about brain death that I will be exploring on this blog for the next few weeks. Michael Nair-Collins has a recent article in the Kennedy Institute of Ethics Journal that argues that the current approach to determining death in the U.S. is paternalistic and, presumably, unjustified. He cites as evidence the kinds of information that are shared with people deciding whether to become organ donors. But is this true, or is there evidence that the public is able to distinguish between brain death and death? Kenneth Kasper, Frank Miller, and I are investigating this at the moment, and we are finding some surprising answers in the literature. Continue reading →