US Liver Transplant Outcomes After Normothermic Regional Perfusion vs Standard Super Rapid Recovery.

Importance: Normothermic regional perfusion (NRP) is an emerging recovery modality for transplantable allografts from controlled donation after circulatory death (cDCD) donors. In the US, only 11.4% of liver recipients who are transplanted from a deceased donor receive a cDCD liver. NRP has the potential to safely expand the US donor pool with improved transplant outcomes as compared with standard super rapid recovery (SRR). Objective: To assess outcomes of US liver transplants using controlled donation after circulatory death livers recovered with normothermic regional perfusion vs standard super rapid recovery. Design, Setting, and Participants: This was a retrospective, observational cohort study comparing liver transplant outcomes from cDCD donors recovered by NRP vs SRR. Outcomes of cDCD liver transplant from January 2017 to May 2023 were collated from 17 US transplant centers and included livers recovered by SRR and NRP (thoracoabdominal NRP [TA-NRP] and abdominal NRP [A-NRP]). Seven transplant centers used NRP, allowing for liver allografts to be transplanted at 17 centers; 10 centers imported livers recovered via NRP from other centers. Exposures: cDCD livers were recovered by either NRP or SRR. Main Outcomes and Measures: The primary outcome was ischemic cholangiopathy (IC). Secondary end points included primary nonfunction (PNF), early allograft dysfunction (EAD), biliary anastomotic strictures, posttransplant length of stay (LOS), and patient and graft survival. Results: A total of 242 cDCD livers were included in this study: 136 recovered by SRR and 106 recovered by NRP (TA-NRP, 79 and A-NRP, 27). Median (IQR) NRP and SRR donor age was 30.5 (22-44) years and 36 (27-49) years, respectively. Median (IQR) posttransplant LOS was significantly shorter in the NRP cohort (7 [5-11] days vs 10 [7-16] days; P < .001). PNF occurred only in the SRR allografts group (n = 2). EAD was more common in the SRR cohort (123 of 136 [56.1%] vs 77 of 106 [36.4%]; P = .007). Biliary anastomotic strictures were increased 2.8-fold in SRR recipients (7 of 105 [6.7%] vs 30 of 134 [22.4%]; P = .001). Only SRR recipients had IC (0 vs 12 of 133 [9.0%]; P = .002); IC-free survival by Kaplan-Meier was significantly improved in NRP recipients. Patient and graft survival were comparable between cohorts. Conclusion and Relevance: There was comparable patient and graft survival in liver transplant recipients of cDCD donors recovered by NRP vs SRR, with reduced rates of IC, biliary complications, and EAD in NRP recipients. The feasibility of A-NRP and TA-NRP implementation across multiple US transplant centers supports increasing adoption of NRP to improve organ use, access to transplant, and risk of wait-list mortality.

Reflect and Reset: Black Academic Voices Call the Graduate Medical Education Community to Action.

The COVID-19 pandemic highlighted the great achievements that the biomedical community can accomplish, but raised the question: Can the same medical community that developed a complex vaccine in less than a year during a pandemic help to defeat social injustice and ameliorate the epidemic of health inequity? In this article, the authors, a group of Black academics, call on the graduate medical education (GME) community to reset its trajectory toward solutions for achieving diversity, improving inclusion, and combating racism using education as the new vector. Sponsoring institutions, which include universities, academic medical centers, teaching hospitals, and teaching health centers, are the center of the creation and dissemination of scholarship. They are often the main sources of care for many historically marginalized communities. The GME learning environment must provide the next generation of medical professionals with an understanding of how racism continues to have a destructive influence on health care professionals and their patients. Residents have the practical experience of longitudinal patient care, and a significant portion of an individual's professional identity is formed during GME; therefore, this is a key time to address explicit stereotyping and to identify implicit bias at the individual level. The authors propose 3 main reset strategies for GME-incorporating inclusive pedagogy and structural competency into education, building a diverse and inclusive learning environment, and activating community engagement-as well as tactics that sponsoring institutions can adapt to address racism at the individual learner, medical education program, and institutional levels. Sustained, comprehensive, and systematic implementation of multiple tactics could make a significant impact. It is an academic and moral imperative for the medical community to contribute to the design and implementation of solutions that directly address racism, shifting how resident physicians are educated and modeling just and inclusive behaviors for the next generation of medical leaders.

How Should Clinicians Address a Patient's Experience of Transgenerational Trauma?

Establishing trust is essential to a healthy patient-surgeon relationship. Respecting patient autonomy while seeking to understand patients' unique perspectives can strengthen trust. This article discusses cultural mistrust, a response shaped by historical iatrogenic harm (ie, unintentional harm caused by health care professionals or the health care system) and transgenerational trauma (ie, the transfer of attitudes and behaviors from survivors of trauma to their children and subsequent generations) and the importance of recognizing how patients' life experiences impact their health decision making.

Pregnancy-induced humoral sensitization overrides T cell tolerance to fetus-matched allografts in mice.

Immunological tolerance to semiallogeneic fetuses is necessary to achieving successful first pregnancy and permitting subsequent pregnancies with the same father. Paradoxically, pregnancy is an important cause of sensitization, resulting in the accelerated rejection of offspring-matched allografts. The underlying basis for divergent outcomes following reencounter of the same alloantigens on transplanted organs versus fetuses in postpartum females is incompletely understood. Using a mouse model that allows concurrent tracking of endogenous fetus-specific T and B cell responses in a single recipient, we show that semiallogeneic pregnancies simultaneously induce fetus-specific T cell tolerance and humoral sensitization. Pregnancy-induced antibodies, but not B cells, impeded transplantation tolerance elicited by costimulation blockade to offspring-matched cardiac grafts. Remarkably, in B cell-deficient mice, allogeneic pregnancy enabled the spontaneous acceptance of fetus-matched allografts. The presence of pregnancy-sensitized B cells that cannot secrete antibodies at the time of heart transplantation was sufficient to precipitate rejection and override pregnancy-established T cell tolerance. Thus, while induction of memory B cells and alloantibodies by pregnancies establishes formidable barriers to transplant success for multigravid women, our observations raise the possibility that humoral desensitization will not only improve transplantation outcomes, but also reveal an unexpected propensity of multiparous recipients to achieve tolerance to offspring-matched allografts.

How Should Trauma Patients' Informed Consent or Refusal Be Regarded in a Trauma Bay or Other Emergency Settings?

The precipitous and unexpected nature of trauma requires training health care practitioners to think and act quickly, according to the best medical interest of the patient. The urgency of treatment for trauma patients, who frequently have temporary alterations in their abilities to make autonomous and competent decisions, often results in presumed consent for medically necessary treatment. Academic trauma centers use protocol-based management of injuries to facilitate their simultaneous evaluation by multiple clinicians and to avoid delays in treatment, ensuring that trauma patients receive the best possible care. In this article, we will discuss the issues of deferred informed consent and surgical education as they relate to trainees' graduated responsibility in the trauma bay.

Congenital membranous occlusion of the suprahepatic inferior vena cava in a pediatric liver transplant.

Congenital membranous occlusion of the inferior vena cava (IVC) in pediatric liver recipients may present with outflow occlusion and if unrecognized, result in graft loss. Prompt evaluation of outflow obstruction in the setting of unexplained inflow compromise is paramount. We report a case of successful IVC reconstruction in a patient with recurrent hepatic artery thrombosis (HAT). A 2-year-old child with history of two liver transplantations developed fevers, ascites, and abdominal tenderness one month after her second liver transplant. Hepatic duplex revealed decreased flow in the hepatic artery and IVC venogram revealed patent hepatic veins with occlusion of the suprahepatic IVC. We performed reconstruction of her suprahepatic IVC to intrapericardial IVC using an end-to-side technique after complete mobilization of the liver. Recovery was uneventful and the patient has been doing well for the last 5 years.