Waiting List Patients Research Articles

Refractory hepatic hydrothorax is associated with increased mortality with death occurring at lower MELD-Na compared to cirrhosis and refractory ascites.

Although refractory hepatic hydrothorax (RH) is a serious complication of cirrhosis, waitlisted patients do not receive standardized Model for End-stage Liver Disease (MELD) exemption because of inadequate evidence suggesting mortality above biochemical MELD. This study aimed to examine liver-related death (LRD) associated with RH compared to refractory ascites (RA). This was a retrospective cohort study of Veterans with cirrhosis. Eligibility criteria included participants with RH or RA, followed from their first therapeutic thoracentesis/second paracentesis until death or transplantation. The primary outcome was LRD with non-LRD or transplantation as competing risk. Of 2552 patients with cirrhosis who underwent therapeutic thoracentesis/paracentesis, 177 met criteria for RH and 422 for RA. RH was associated with a significantly higher risk of LRD (adjusted HR [aHR] 4.63, 95% CI 3.31-6.48) than RA overall and within all MELD-sodium (MELD-Na) strata (<10 aHR 4.08, 95% CI 2.30-7.24, 10-14.9 aHR 5.68, 95% CI 2.63-12.28, 15-24.9 aHR 4.14, 95% CI 2.34-7.34, ≥25 aHR 7.75, 95% CI 2.99-20.12). LRD was higher among participants requiring 1 (aHR 3.54, 95% CI 2.29-5.48), 2-3 (aHR 4.39, 95% CI 2.91-6.63), and ≥4 (aHR 7.89, 95% CI 4.82-12.93) thoracenteses relative to RA. Although participants with RH and RA had similar baseline MELD-Na, LRD occurred in RH versus RA at a lower MELD-Na (16.5 vs. 21.82, p =0.002) but higher MELD 3.0 (27.85 vs. 22.48, p <0.0001). RH was associated with higher risk of LRD than RA at equivalent MELD-Na. By contrast, MELD 3.0 may better predict risk of LRD in RH.

Epimeric vitamin D and cardiovascular structure and function in advanced CKD and after kidney transplantation.

25-hydroxyvitamin D can undergo C-3 epimerization to produce 3-epi-25(OH)D3. 3-epi-25(OH)D3 levels decline in chronic kidney disease (CKD), but its role in regulating the cardiovascular system is unknown. Herein, we examined the relationship between 3-epi-25(OH)D3, and cardiovascular functional and structural endpoints in patients with CKD. We examined n=165 patients with advanced CKD from the Cardiopulmonary Exercise Testing in Renal Failure and After Kidney Transplantation (CAPER) study cohort, including those who underwent kidney transplant (KTR, n=76) and waitlisted patients who did not (NTWC, n=89). All patients underwent cardiopulmonary exercise testing and echocardiography at baseline, 2 months and 12 months. Serum 3-epi-25(OH)D3 was analyzed by liquid chromatography-tandem mass spectrometry. Patients were stratified into quartiles of baseline 3-epi-25(OH)D3 (Q1: <0.4 ng/mL, n=51; Q2: 0.4 ng/mL, n=26; Q3: 0.5-0.7 ng/mL, n=47; Q4: ≥0.8 ng/mL, n=41). Patients in Q1 exhibited lower peak oxygen uptake [VO2Peak=18.4 (16.2-20.8) mL/min/kg] compared with Q4 [20.8 (18.6-23.2) mL/min/kg; P=.009]. Linear mixed regression model showed that 3-epi-25(OH)D3 levels increased in KTR [from 0.47 (0.30) ng/mL to 0.90 (0.45) ng/mL] and declined in NTWC [from 0.61 (0.32) ng/mL to 0.45 (0.29) ng/mL; P<.001]. Serum 3-epi-25(OH)D3 was associated with VO2Peak longitudinally in both groups [KTR: β (standard error) = 2.53 (0.56), P<.001; NTWC: 2.73 (0.70), P<.001], but was not with left ventricular mass or arterial stiffness. Non-epimeric 25(OH)D3, 24,25(OH)2D3 and the 25(OH)D3:24,25(OH)2D3 ratio were not associated with any cardiovascular outcome (all P>.05). Changes in 3-epi-25(OH)D3 levels may regulate cardiovascular functional capacity in patients with advanced CKD.

Healthcare costs after kidney transplantation compared to dialysis based on propensity score methods and real world longitudinal register data from Sweden

This study aimed to estimate the healthcare costs of kidney transplantation compared with dialysis using a propensity score approach to handle potential treatment selection bias. We included 693 adult wait-listed patients who started renal replacement therapy between 1998 and 2012 in Region Skåne and Stockholm County Council in Sweden. Healthcare costs were measured as annual and monthly healthcare expenditures. In order to match the data structure of the kidney transplantation group, a hypothetical kidney transplant date of persons with dialysis were generated for each dialysis patient using the one-to-one nearest-neighbour propensity score matching method. Applying propensity score matching and inverse probability-weighted regression adjustment models, the potential outcome means and average treatment effect were estimated. The estimated healthcare costs in the first year after kidney transplantation were €57,278 (95% confidence interval (CI) €54,467–60,088) and €47,775 (95% CI €44,313–51,238) for kidney transplantation and dialysis, respectively. Thus, kidney transplantation leads to higher healthcare costs in the first year by €9,502 (p = 0.066) compared to dialysis. In the following two years, kidney transplantation is cost saving [€36,342 (p < 0.001) and €44,882 (p < 0.001)]. For patients with end-stage renal disease, kidney transplantation reduces healthcare costs compared with dialysis over three years after kidney transplantation, even though the healthcare costs are somewhat higher in the first year. Relating the results of existing estimates of costs and health benefits of kidney transplantation shows that kidney transplantation is clearly cost-effective compared to dialysis in Sweden.

Improving Broader Sharing to Address Geographic Inequity in Liver Transplantation

Problem definition: This paper studies the deceased-donor liver allocation policies in the United States. In the transplant community, broader organ sharing is believed to mitigate geographic inequity (intergeographic variation in transplant rates, patient survival rates, waiting times, and offers) in organ access, and recent policies are moving in that direction in principle. The liver-allocation policy has gone through two major modifications in the last 10 years. Despite these overhauls, geographic inequity persists. Methodology/results: In this study, we develop a patient’s dynamic choice model to analyze the patient’s strategic response to a policy change. We use this to evaluate several (existing and proposed) organ-allocation policies. On historical data, we show that our model’s predictions are more precise than the existing liver simulated allocation model. It more accurately captures (1) a patient’s change in organ offer acceptance probability (with their sickness level) and (2) the behavioral change of a patient in terms of organ offer acceptance probability with a change in policy. Next, we study the current acuity circles policy (a one-size-fits-all variant of broader sharing) and conclude that it results in lower efficiency (more offer refusals and a lower transplant benefit) than the previous share 35 policy and performs similarly on geographic equity measures. Finally, we show that broader sharing in its current form may not be the best strategy to balance geographic equity and efficiency. The intuition is that, by indiscriminately enlarging the pool of supply locations from where patients can receive offers, they tend to become more selective, resulting in more offer rejections and less efficiency. We illustrate that a policy that equalizes the supply (deceased donors)-to-demand (waiting list patients) ratios across geographies is better than acuity circles in achieving geographic equity at the lowest trade-off on efficiency metrics. Managerial implications: The key message to policymakers is that they should move away from the one-size-fits-all approach and focus on matching supply and demand to develop organ-allocation policies that score well in terms of efficiency and geographic equity. Supplemental Material: The e-companion is available at https://doi.org/10.1287/msom.2023.1211 .

The clinical profile of individuals with symptoms of knee osteoarthritis referred to secondary care in Denmark: Across-sectional study of 282 people.

The clinical profile of individuals with symptoms of knee osteoarthritis referred to secondary care in Denmark: Across-sectional study of 282 people.

#6327 ACCEPT OR DECLINE? A STATISTICAL APPROACH TO AID DECISION MAKING

Abstract Background and Aims The clinician-patient decision of whether to accept or decline an offered deceased donor kidney is one of the most complex in transplantation. Though many attempts have been made to risk stratify based on donor and recipient characteristics as well as other methods, reliance on clinical intuition remains high. We used a novel statistical modelling technique to better understand potential outcomes for patients following acceptance or decline of a deceased donor organ offer in the UK. Method We obtained UKTR data held by NHS Blood and Transplant (NHSBT) on adult patients listed for kidney transplantation in the UK, deceased donor kidney offers and post-transplant outcomes. Multivariable models to demonstrate 5-year transplant survival (a composite of graft and patient survival) for patients from the point of offering and post-transplant survival were developed using a Cox proportional hazard techniques. Waiting time to a “better” offer was modelled using a micro-simulation approach for patients and donors with different profiles, incorporating the points system from the current UK kidney offering scheme. Rates of patients arriving on the waiting list, leaving the list and being transplanted were obtained to facilitate this, as well as characteristics of waitlisted patients and organ donors. Simulations were then run to ascertain potential outcomes from the point of offer for an index patient for scenarios characterised by offers from donors with differing profiles. Results Figure 1 demonstrates the outcomes of an index patient if they accept an organ offer from a donor with the demonstrated characteristics compared with potential outcomes if the next offer is accepted. Figure 2 uses the same techniques but demonstrates outcomes if a kidney from a donor with ‘worse’ characteristics is offered. Conclusion This study demonstrates a novel method to help visualise potential outcomes for patients listed for deceased donor kidney transplantation. With further input from patient and clinician perspectives, this work has potential to be beneficial in facilitating discussions between patients and clinicians regarding decision making at the time of organ offering and may ultimately improve organ utilisation.

Impact of end-stage knee osteoarthritis on perceived physical function and quality of life: A descriptive study from Jordan.

Of the present study was to evaluate the impact of end-stage knee OA on patient's perception of their functional abilities and quality of life (QoL) using the self-reported questionnaire; the Knee Injury and Osteoarthritis Outcome Score (KOOS), and to determine the contribution of knee pain on patient's perceived outcomes. Patients with end-stage knee OA who are on the waiting list for total knee arthroplasty were recruited in this cross-sectional study. Patients were asked to fill out the KOOS questionnaire. Knee pain for both sides was quantified on a continuous scale from 0-10. Age, and anthropometric data were recorded. Descriptive statistics were calculated for patients' characteristics, and for the scores of each KOOS subscale. Hierarchical linear regression models were created to determine the contributions of knee pain on two KOOS subscales; the function in daily living (KOOS-ADL), and the knee-related quality of life (KOOS-QoL). Patients in this study scored low across KOOS subscales (27.7% - 54.2%) with the QoL subscale being the lowest. After accounting for age and BMI, hierarchical linear regressions revealed that knee pain in both sides were determinants of self-perceived KOOS-ADLs, while only knee pain in the most-affected side significantly contributed to lower KOOS-QOL scores. End-stage knee OA negatively impact the patients' perceived function and quality of life. Patients' KOOS scores were similar to those reported in other countries, with QoL being the domain most affected. Our findings demonstrate that the level of knee pain has a determinant effect on our patients' perceptions of functional abilities and QoL. As waiting-list patients, addressing knee pain with a targeted regimen prior to TKA, as well as increasing patient's awareness about knee pain management, may improve/ or minimize deterioration in perceived functional ability and QoL while awaiting TKA.

Increasing Kidney-Exchange Options Within the Existing Living Donor Pool With CIAT: A Pilot Implementation Study.

Computerized integration of alternative transplantation programs (CIAT) is a kidney-exchange program that allows AB0- and/or HLA-incompatible allocation to difficult-to-match patients, thereby increasing their chances. Altruistic donors make this available for waiting list patients as well. Strict criteria were defined for selected highly-immunized (sHI) and long waiting (LW) candidates. For LW patients AB0i allocation was allowed. sHI patients were given priority and AB0i and/or CDC cross-match negative HLAi allocations were allowed. A local pilot was established between 2017 and 2022. CIAT results were assessed against all other transplant programs available. In the period studied there were 131 incompatible couples; CIAT transplanted the highest number of couples (35%), compared to the other programs. There were 55 sHI patients; CIAT transplanted as many sHI patients as the Acceptable Mismatch program (18%); Other programs contributed less. There were 69 LW patients; 53% received deceased donor transplantations, 20% were transplanted via CIAT. In total, 72 CIAT transplants were performed: 66 compatible, 5 AB0i and 1 both AB0i and HLAi. CIAT increased opportunities for difficult-to-match patients, not by increasing pool size, but through prioritization and allowing AB0i and "low risk" HLAi allocation. CIAT is a powerful addition to the limited number of programs available for difficult-to-match patients.

PULM9: Development of a Novel Cannula for Durable Venovenous Extracorporeal Membrane Oxygenation

Background: Fifteen million Americans suffer from chronic obstructive pulmonary disease (COPD). After failed optimal medical therapy, the only definitive treatment is lung transplantation, which is limited due to donor scarcity. Extracorporeal membrane oxygenation (ECMO) can be used in acute exacerbations of COPD or as a bridge to transplant for waitlisted COPD patients, but it is not currently suited for long-term respiratory support. Existing venovenous (VV) ECMO configurations often utilize a dual lumen cannula that is inserted into the jugular vein and is designed for short term use. While effective, dual lumen cannulas are associated with high resistance and malposition which limits blood flow, promotes cavitation, and increases blood trauma. Furthermore, patient ambulation is cumbersome because of the difficulty of securing the dual lumen cannula safely to the patient. A novel ECMO system that provides durable respiratory support could reduce morbidity and mortality in patients and facilitate ambulatory use. To this end, a dual lumen cannula that is attached to the heart and tunneled to a more ergonomic position could provide more durable, long term ECMO support. Here, we describe our initial efforts to develop a durable VV ECMO cannula with reduced resistance. Methods: A novel cannula for long-term VV ECMO support was developed using computer aided design. The cannula is designed for surgical attachment to the right atrium with the cannula’s drainage tip at the cavoatrial junction and the reinfusion port directed towards the tricuspid valve to minimize recirculation. Pressure drop was evaluated for the novel cannula, 28Fr, and 32Fr Crescent cannulas (MC3, Dexter, MI) for comparison (N≥5) in circuits primed with deionized water at ambient temperature. A Rotaflow (Maquet, Wayne, NJ) blood pump was operated at 2700-3625 RPM, and pressure drop was assessed for flow rates between 0.1 – 5 LPM. Porcine hearts were harvested from healthy pigs and utilized for ex vivo cannula fit studies. Water flow through the cannula into the right atrium was evaluated using videography. Results: The novel cannula drainage pressure drop (-12±1.1mmHg) was similar to the 28Fr Crescent (-13± 0.3mmHg) and 32Fr Crescent (-9±0.3mmHg) at 2LPM (Figure 1). Reinfusion pressure drop was similar between the novel cannula (22±1.2mmHg) and the 32Fr Crescent (21±0.4mmHg), and higher for the 28Fr Crescent (43±0.9mmHg) at 2LPM. Total pressure drop was similar between the novel cannula (33.4±1.2mmHg) and 32Fr Crescent (29.4±0.5mmHg) and higher for the 28Fr Crescent (57±1.0mmHg) at 2LPM. In ex-vivo heart studies flow through the novel cannula was directed towards the tricuspid valve and entered the right ventricle. Conclusions: Our novel cannula possesses an excellent pressure-flow profile, comparable to the largest-bore commercially available dual lumen cannulas. This novel cannula will enhance durability and ease of use for patients requiring durable mechanical respiratory support.Figure 1. Pressure Flow Curve for Novel VV ECMO Cannula

Development of a calculated panel reactive antibody calculator for the United Arab Emirates: a proof of concept study

Calculated panel reactive antibody (CPRA) is used to help increase sensitized patient’s access to transplantation. United Arab Emirates (UAE) has a diverse resident population hence we developed a UAE–CPRA calculator based on HLA antigen frequencies of the different ethnic groups that represent the UAE population. HLA antigen frequencies at serological split antigen level for HLA-A, -B, -C, -DRB1 and -DQB1 of 1002 healthy unrelated donors were performed. We subsequently compared the performance of the UAE CPRA calculator with the Organ Procurement and Transplantation Network (OPTN) and the Canadian CPRA calculators in 110 Kidney Transplant waitlist patients from January 2016 to December 2018. Lin’s concordance correlation coefficient showed a moderate agreement between the UAE and OPTN calculator (Rc = 0.949, 95% CI 0.929–0.963) and the UAE and Canadian calculators (Rc = 0.952, 95% CI 0.932–0.965). While there continued to be a moderate agreement (Rc = 0.937, UAE versus OPTN calculator) in the lower sensitized group, a poor agreement (Rc = 0.555, UAE versus OPTN calculator) was observed in the higher sensitized group. In this study, we provide a template for countries to develop their own population-specific CPRA calculator. Implementation of the CPRA algorithm based on HLA frequencies of the multi-ethnic UAE population will be more fitting to increase access to transplantation and improve transplant outcomes. Our study demonstrates that the CPRA calculators developed using the data from the western population had poor correlation in our higher sensitized patients disadvantaging them in potential organ allocations systems. We plan to further refine this calculator by using high resolution HLA typing to address the problem of a genetically diverse population.

Effectiveness of education and attitudes toward different types of deceased donor kidneys: Survey analysis of single-center experience.

We lack data on the effectiveness of education and the patient's attitude toward different deceased donor kidney types. A prospective study was performed to evaluate patient attitudes, baseline knowledge, and effectiveness of our kidney transplant education process. We also analyzed the knowledge retention of our waitlist patients. We prospectively surveyed a patient cohort using a paired analysis pre and post education with initial evaluation visit. Knowledge retention among waitlist patients was assessed with annual waitlist visit. One hundred four patients received paired surveys to assess the baseline knowledge and effectiveness of education. Forty-three patients received a single survey with their annual waitlist evaluation to assess knowledge retention. Paired survey showed mixed results, with no statistically significant improvement in the kidney donor profile index domain. Significant improvement was seen in the hepatitis C virus-positive donor domain and the Public Health Service (PHS) increased-risk donor domain. For the waitlist cohort, overall knowledge retention ranged from excellent to fair, with a decline in knowledge for the PHS increased-risk donor domain. Our study suggests that the education intervention regarding different deceased donor kidney types is effective overall and transplant candidates retain the knowledge while waiting for transplant.

Preventable harm in the Canadian organ donation and transplantation system: a descriptive study of missed organ donor identification and referral

PurposeDeceased organ donation is predicated on timely identification and referral (IDR) of potential organ donors. Many Canadian provinces have legislated mandatory referral of potential deceased donors. Untimely or missed IDRs are safety events where best or expected practice has not occurred causing preventable harm to patients and denying families the opportunity of donation at end of life (EOL) as well as denying transplant waitlist patients access to lifesaving organs.MethodsWe requested donor definitions and data to calculate IDR, consent, and approach rates from all Canadian organ donation organizations (ODOs) for 2016–2018. We then estimated the number of missed IDR patients who were eligible for approach (safety events) and the associated preventable harm to patients at EOL and on transplant waitlists.ResultsAnnually, there were 63–76 missed IDR patients eligible for approach (3.6–4.5 per million population [PMP]) from four ODOs—three with mandatory referral legislation. Applying each ODO’s approach and consent rates for the corresponding year, there were 37–41 missed donors (2.4 donor PMP) annually. Assuming three transplants per donor, the theoretical number of missed transplants would be 111–123 (6.4–7.3 transplants PMP) annually.ConclusionsData from four Canadian ODOs show that missed IDR safety events resulted in important preventable harm measured by a lost opportunity for donation of 2.4 donors PMP annually and 354 potentially missed transplants between 2016 and 2018. Given that 223 patients died on Canada’s waitlist in 2018, national donor audits and quality improvement initiatives to optimize IDR are essential to reduce preventable harm to these vulnerable populations.

Contextual Vulnerability Should Guide Fair Subject Selection in Xenotransplantation Clinical Trials

Contextual Vulnerability Should Guide Fair Subject Selection in Xenotransplantation Clinical Trials

Expanding the heart donor pool: Can left ventricular assist devices substitute for marginal donor heart allografts?

BackgroundGenerally, heart transplantation with marginal donor allografts is reserved for a subset of high-risk patients. However, given the improved survival rates for patients on left ventricular assist devices, it is worth analyzing if they could potentially substitute for marginal donor allografts. This study aimed to compare survival outcomes of waitlisted patients with left ventricular assist devices who did not undergo heart transplantation to those who underwent heart transplantation with marginal allografts. MethodsThis was a retrospective cohort study of adults (≥18 years) listed for heart transplantation between 2010 and 2022 in the Organ Procurement and Transplantation Network database. A previously validated risk score was used to define marginal donor organs. The primary outcome was death after transplantation or on the waitlist, as appropriate. ResultsOf 5,713 patients with left ventricular assist devices, 4,683 (82%) comprised the left ventricular assist devices group and 1,030 (18%) the marginal group. The marginal cohort was older (57 [49–64] vs 55 [45–62] years, P < .001), similarly female (26 vs 24%, P = .16), and less often White (51 vs 60%, P < .001). Relative to the left ventricular assist devices group, the marginal group demonstrated higher 5-year survival from 2010 to 2014 (81 vs 43%, P < .001) and from 2015 to 2019 (77 vs 66%, P < .001). After adjustment, marginal patients demonstrated a significantly reduced hazard of 5-year mortality for those listed from 2010 to 2014 (hazard ratio 0.25, confidence interval 0.20–0.31; P < .001) and from 2015 to 2019 (hazard ratio 0.46, confidence interval 0.37–0.57; P < .001). ConclusionOur study validates the superiority of transplantation relative to left ventricular assist devices but also underscores the survival benefit of heart transplantation with marginal donor allografts, even in high-risk patients.

The state of kidney replacement therapy in Eastern Cape Province, South Africa: A call to action.

South Africa (SA) is one of the most financially unequal countries in the world. This situation is highlighted by disparate access to healthcare, particularly provision of kidney replacement therapy (KRT). Unlike the private sector, public sector access to KRT is highly rationed, and patient selection is based on suitability for transplantation and capacity. To investigate the state of the KRT service in Eastern Cape Province, SA, by analysing access to and provision of KRT in the province for individuals with end-stage kidney disease, as well as disparities between the private and public healthcare systems. This was a retrospective descriptive study to examine KRT provision and temporal trends in the Eastern Cape. Data were obtained from the South African Renal Registry and the National Transplant Waiting List. KRT provision was compared between the three main referral centres, in Gqeberha (formerly Port Elizabeth), East London and Mthatha, and between the private and public healthcare systems. There were 978 patients receiving KRT in the Eastern Cape, with an overall treatment rate of 146 per million population (pmp). The treatment rate for the private sector was 1 435 pmp, compared with 49 pmp in the public sector. Patients treated in the private sector were older at initiation of KRT (52 v. 34 years), and more likely to be male, to be HIV positive, and to receive haemodialysis as their KRT modality. Peritoneal dialysis was more commonly used in Gqeberha and East London as the first and subsequent KRT modality, compared with Mthatha. There were no patients from Mthatha on the transplant waiting list. There were no waitlisted HIV-positive patients in the public sector in East London, compared with 16% of the public sector patients in Gqeberha. The kidney transplant prevalence rate was 58 pmp in the private sector and 19 pmp in the public sector, with a combined prevalence of 22 pmp, constituting 14.9% of all patients on KRT. We estimated the shortfall of KRT provision in the public sector to be ~8 606 patients. Patients in the private sector were 29 times more likely to access KRT than their public sector counterparts, who were on average 18 years younger at initiation of KRT, probably reflecting selection bias in an overburdened public health system. Transplantation rates were low in both sectors, and lowest in Mthatha. A large public sector KRT provision gap exists in the Eastern Cape and needs to be addressed urgently.

A Scoping Review of the Impact of COVID-19 on Kidney Transplant Patients in the United States.

SARS-CoV-2, responsible for the COVID-19pandemic, is a highly infectious virus that quickly became and continues to be a public health emergency, given the severe international implications. Immunocompromised patients, such as those undergoing kidney transplantation, are at an increased risk for severe illness from COVID-19 and require hospitalization for more aggressive treatment to ensure survival. COVID-19 has been infecting kidney transplant recipients (KTRs), affecting their treatment protocols, and threatening their survival. The objective of this scoping review was to summarize the published literature regarding the impact of COVID-19 on KTRs in the United States in terms of prevention, various treatment protocols, COVID-19 vaccination, and risk factors. The databases such as PubMed, MEDLINE/Ebsco, and Embase were used to search for peer-reviewed literature. The search was restricted to articles that were published on KTRs in the United States from January 1, 2019, toMarch 2022. The initial search yielded 1,023 articles after removing duplicates, leading to a final selection of 16 articles after screening with inclusion and exclusion criteria. Four domains emerged from the review: (1) impacts of COVID-19 on performing kidney transplants, (2) impacts of COVID-19 vaccinations on KTRs, (3) outcomes of treatment regiments for KTRs with COVID-19, and (4) risk factors associated with an increased mortality rate of COVID-19 in KTRs. Waitlisted patients for kidney transplants had a higher risk of mortality compared to nontransplant patients. COVID-19 vaccinations in KTRs are found to be safe, and the immune response can be improved by placing patients on a low dose of mycophenolate before vaccination. Withdrawal of immunosuppressants showed a mortality rate of 20% without increasing the rate of acute kidney injury (AKI). There is evidence to support that kidney transplantation with the accompanying immunosuppressant regimen can provide KTRs with better COVID-19 infection outcomes compared to waitlisted patients. Hospitalization, graft dysfunction, AKI, and respiratory failure were the most common risk factors that increased the risk of mortality in COVID-19-positive KTRs. Withdrawing KTRs from immunosuppressive drugs increased the mortality rate. Further studies are needed to investigate the effects of specific drugs and dosages on the severity and mortality rate of COVID-19 in KTRs.

Setting Organ Allocation Priorities: A Discrete Choice Experiment with German Patients and Their Relatives.

Organ transplantation systems benefit from guidelines that are harmonious with the preferences of the people involved. Discrete choice experiments are useful tools for eliciting preferences. This study evaluated the preferences of patients and their relatives (n=285) to identify their priorities in organ allocation using a discrete choice experiment. In eight hypothetical allocation decisions, the participants were asked to select the candidate they considered the most suitable The candidates differed in years of life gained after transplantation, quality of life after transplantation, waiting time until transplantation, age, compliance and social support. The most important aspects for setting priority in organ allocation were lack of compliance (β= -2.5, p<0.001) and good quality of life after transplantation (β = +1.4, p<0.001). The lack of social support (ß = -0.8, p<0.05) and the more years of life gained after transplantation (β = +0.5, p<0.001) had less but still a significant amount of influence on this decision, while the waiting list was not considered significantly important (β = 0.1, p>0.05). The comparison of the different relations to transplantation showed that life years gained after transplantation was of high relevance to posttransplant patients (+10 years: β = +0.709, p<0.001 / +15 years: β = +0.700, p<0.001) and of no importance to waitlisted patients (+10 years: β = +0.345, p>0.05 / + 15 years: β = +0.173, p>0.05) and relatives (+ 10 years: β = +0.063, p>0.05 / +15 years: β = +0.304, p>0.05). This study provides useful insights into the unique perspective of patients and their relatives on priority-setting in the allocation of donor organs that should be reflected in improved donor organ allocation rules.

Impact of COVID-19 on abdominal organ transplantation: A bibliometric analysis.

Abdominal solid organ transplant (SOT) programs have been hit hard by the COVID-19 pandemic, which was officially declared as such on March 11, 2020. Over two years, the tightening and softening of limitations in response to the "waves" of infection and COVID-19 fluctuations have provided distinct issues for waitlisted patients, transplant recipients, and transplant organizations. We searched Scopus using the terms "transplant" and "transplantation," and organ-related phrases like "intestin*," "liver," "kidney," "hepatic," "renal," and "pancrea*," as well as COVID-19 terms such as "COVID-19," "coronavirus," and "SARS-CoV-2." We included articles, reviews, conference papers, letters, notes, editorials, brief surveys, book chapters, and errata and studied nations, institutions, authors, journals, keywords, and articles. VOSviewer 1.6.18 and Excel were used to create tables and figures. We included 1,251 of 1,256 studies. Among them, 289 (23.1%), 489 (39.1%), and 473 (37.8%) papers were published in 2020, 2021, and 2022, with mean (SD) citations of 30.3 (53.3), 14.3 (26.8), and 4.79 (6.38), respectively. Compared to other abdominal organs, the field of kidney transplants had the highest number of articles describing the impact of COVID-19. The United States contributed the most articles, and the American Journal of Transplantation published the most articles. To our knowledge, this is the first bibliometric investigation of the impact of COVID-19 on SOT. This report provides an overview of the research conducted on SOT and COVID-19. There is potential for this bibliometric analysis to serve as a beneficial and practical resource for ongoing and future research.

Acuity circles allocation policy impact on waitlist mortality and donation after circulatory death liver transplantation: A nationwide retrospective analysis.

Acuity circles allocation policy impact on waitlist mortality and donation after circulatory death liver transplantation: A nationwide retrospective analysis.

OPTN/SRTR 2021 Annual Data Report: Introduction

The OPTN/SRTR 2021 Annual Data Report presents the status of the solid organ transplantation system in the United States from 2010 through 2021. Organ-specific chapters are presented for kidney, pancreas, liver, intestine, heart, and lung transplant. Each organ-specific chapter is organized to present waitlist information, donor information (both deceased and living, as appropriate), transplant information, and patient outcomes. Data pertaining to pediatric patients are generally presented separately from the adult data. In addition to the organ-specific chapters, you will find chapters dedicated to deceased organ donation, vascularized composite allograft, and the COVID-19 pandemic. The data presented in the Annual Data Report are descriptive in nature. In other words, most tables and figures present raw data without statistical adjustment for possible confounding or changes over time. Therefore, the reader should keep in mind the observational nature of the data when attempting to draw inferences before trying to ascribe a cause to any observed patterns or trends. This introduction provides a brief overview of trends in waitlist and transplant activity. More detailed descriptions can be found in the respective organ-specific chapters.