Expanding the Donor Pool: Harnessing the Potential of Organ Donation from Deceased Poisoned Donors

Organ transplantation has revolutionized medicine, offering hope to millions battling end-stage organ failure. However, the persistent gap between organ demand and supply calls is for innovative strategies. Among these, the potential of utilizing organs from deceased donors who succumbed to poisoning or toxicological causes remains underexplored. The systematic review by Rupesh et al. serves as a clarion call for the integration of toxicological expertise into transplantation practices.[1] It has meticulously analyzed data from 66 studies, showcasing the breadth of poisonings from opioids and methanol to exotic toxins like hemlock and cyanide that have resulted in successful organ donations. Notably, recipient outcomes, whether in the short-, medium-, or long-term, were comparable between poisoned and nonpoisoned donors. This challenges preconceived notions regarding the safety of organs from such donors and underscores the need to view these cases not as high-risk or marginal, but as scientifically viable contributions to the donor pool. A study from South America by Duque et al. way back in 2004 had shown comparable graft and patient outcomes between the recipients of organs from poisoned and nonpoisoned donors.[2] Despite documented successes, biases persist within the transplant community. Concerns about toxin clearance, organ quality, and unanticipated complications contribute to the reluctance. However, as the review emphasizes, the majority of transplant-related complications in these cases are unrelated to the donor’s poisoning. In general, there is fear that prospective deceased donors due to intoxication are also likely to have sepsis or organ dysfunction. However, each case may be different and such prejudice is uncalled for. Furthermore, advanced screening techniques and perfusion technologies have significantly mitigated risks. By delineating specific inclusion and exclusion criteria based on the type of poisoning, clinicians can approach these donors with confidence and precision. Patterns of poisoning death differ between developed and developing countries.[3] The common scenarios that may be encountered by transplant teams in India include intoxication with organophosphorus poisoning, opioids, methanol, paraquat, and snake bite envenomation. Organ dysfunction may be due to systemic inflammatory response syndrome and not necessarily due to the effect of toxins. For instance, in the case of organophosphate poisoning, renal dysfunction per se should not automatically disqualify prospective donation and whenever uncertain, graft biopsy should be performed before transplantation. A study from China has investigated the effect of preimplant wedge biopsy of deceased donor kidneys of donors who had died from organophosphorus poisoning. All six investigated donors had only minor changes on histopathology and the harvested grafts had excellent outcomes at 1 year.[4] Of note, not all organs may be harvested in case of specific poisoning and may vary based on the specific toxin. Another important challenge in cases of intoxication is the declaration of brain death itself since many of the toxins are depressants and may interfere with the prerequisites for brainstem death declaration. As mentioned by the authors, appropriate use of ancillary testing in addition to apnea test is warranted in addition to waiting for five half-lives allowing for 97% of drugs to be eliminated before brain death examination. The rationale behind waiting for five half-lives is that only 3% of the drug is left behind. There are several caveats to this rule as well.[5] First, if there is a suspicion of multiple drug overdose or if the drug/toxin is not known, then declaration has to be done with caution. Second, if large doses have been consumed, then even 3% drug level may still be beyond acceptable limits. Third, in the presence of organ dysfunction, pharmacokinetics of the drug and toxin may be altered.[6] These points have to be considered and documented before brainstem declaration. There is an urgent need to develop consensus guidelines at national and regional level on the utilization of organs from patients with common poisoning and envenomation. These guidelines may focus on the aspects of brainstem death declaration, organs that may be safely harvested in specific poisoning, assessment of preimplant biopsy, and interpretation.