Maximizing liver transplantation from non-heart-beating donors

In order to increase the supply of transplantable organs, an increasing number of organ procurement organizations are adopting policies regarding donations from non-heart-beating donors. Few centers, however, actually recover and transplant these organs. This article reviews a case in which kidneys and livers imported from out of state were successfully recovered from a non-heart-beating donor and transplanted. In addition, the article demonstrates how cooperation and flexibility in transplant personnel can increase the number of organs transplanted from a non-heart-beating donor.     

Organ procurement and transplantation from non-heart-beating donors

Despite a significant increase in procurement and transplantation activities observed in France in the last eight years, the shortage in grafts is on the rise and demand keeps being much higher than supply. Since 1968 and until now, procurement was limited to heart beating brain donors. The results of kidneys transplanted from non-heart-beating donors have significantly improved and are nowadays comparable to those of kidney transplantations from brain death donors, thanks to a more accurate selection of donors and recipients, to better respect of preventing cold and warm ischemia times and to several major therapeutic innovations. Procurement on non-heart-beating donors are therefore being reconsidered under considerations of feasibility, results and ethical and legal consequences, under a specific medical protocol issued by the agency of biomedicine with the pilot hospital center agreement to comply with the protocol. Referring to foreign experiences, this program is likely to decrease the organ shortage, which is jeopardizing the treatment of a large number of patients awaiting transplantation.     

Donation after cardiac death has a minimal impact on thoracic organ recovery

BACKGROUND: Our organ procurement organization recently developed an aggressive donation after cardiac death program. Thoracic organs are rarely recovered from non-heart-beating donors. Therefore, there is concern that donation after cardiac death may affect the recovery of thoracic organs from donors not allowed to progress to brain death. OBJECTIVE: To evaluate the potential impact of donation after cardiac death on the recovery of thoracic organs. METHODS: On the assumption that prolongation of care on all cases would result in a diagnosis of brain death. By retrospective chart review, all donations after cardiac death were evaluated for thoracic organ potential using the same standards that were used to evaluate brain-dead donors. RESULTS: During the study period there were 34 of 44 (77%) non-heart-beating donors qualified to donate abdominal organs only. Ten of 44 non-heart-beating donors (24%) qualified to potentially donate thoracic organs; the families of 4 of 10 of these donors insisted on the immediate withdrawal of life support, leaving only 6 donors with thoracic organ potential. All 6 of these donors qualified as potential heart donors and 3 as potential lung donors. CONCLUSIONS: A total of 97 organs were recovered and successfully transplanted from 44 non-heart-beating donors. If all the donors who qualified to donate thoracic organs progressed to brain death and if their thoracic organs were transplantable, then 6 additional hearts and 3 pairs of lungs may have been recovered. These data demonstrate that an aggressive donation after cardiac death program contributes significantly to the organ donor pool, with a minimal impact on potential thoracic organ recovery.     

Abdominal Transplant Surgery and Transplant Coordination University Hospitals Leuven 1997–2007: an Overview

The transplant surgery and transplant coordination department was created in 1997 to meet up with the demand of the growing abdominal transplant surgery and organ procurement activity at the University Hospitals in Leuven. Since then, the procurement activity has increased and is currently distributed within the University Hospital Gasthuisberg and a network of ~25 collaborative hospitals. The profile of the donors has changed with older donors and more co-morbidity factors (obesity, hypertension, etc.). This donor activity represents ~30% of the national donor pool. Over the last 10 years, more than 1100 kidneys, more than 500 livers, ~50 pancreas, and 5 intestines have been transplanted in both adults and children. One year survival equal to-or exceeding 90% has been achieved for all abdominal organs and this compares favorably with international registries. More than 40 multi-visceral transplants {liver in combination with abdominal (kidney, pancreas, intestine) or thoracic (heart, double lung, heart-lung) organs} have been performed with results equivalent to isolated liver transplants and very little immunological graft loss (probably due to the immunoprotective effect of the liver). A live donation program was started for the kidney (40 cases) and for the liver (10 cases) in adults and children and no surgical graft loss has been seen so far. Introduction of new machine perfusion systems (and development of donor protocols) has made it possible to restart a non-heart-beating donor program for kidney transplantation. Experimental demonstration that livers tolerate short periods of warm ischemia has also allowed to start liver transplantation from non-heart-beating donors. In the future, machine perfusion of livers, viability testing, and biological modulation are likely to widen the use of marginal livers for transplantation and improve the results. An immunomodulatory protocol proven in the lab to induce the development of regulatory T cells has been applied clinically to 5 consecutive intestinal transplants. All 5 - at the time of writing - have been rejection-free and have achieved nutritional independence. Continuous research and development is warranted to increase the organ donor pool (currently the solely limiting factor of transplantation) and to optimize long-term graft and patient outcome.     

"Every organ, every time" attitude teamed up with SoftMD results in successful lung transplant from a 72-year-old donor

Since 1998, lung transplants have increased almost 75%, making lung transplant the fastest growing form of organ transplant in the United States. However, the supply of transplantable lungs continues to fall short of the demand. Strategies for expanding the lung donor pool by increasing the number of older donor lungs used has been effective, although these donors do not meet typical clinical selection criteria based on age. In these older donors, effective communication of in-depth donor information is necessary to place and transplant lungs successfully. The following case study illustrates how an "every organ, every time" attitude combined with a technique to communicate clinical information resulted in the successful transplant of 72-year-old donor lungs into a bilateral lung recipient. Since the case outlined in this study, the organ procurement organization has successfully recovered and transplanted an additional 2 lungs from a 74-year-old and 1 lung from a 76-year-old, 2 of the oldest lung donors in the United States. This case demonstrates that although many older donor lungs are deemed unsuitable by clinical selection criteria, an extended criteria population offers an untapped resource for donor organs.     

Pulmonary Recruitment Protocol For Organ Donors: A New Strategy to Improve the Rate of Lung Utilization

Because lung transplantation is the only effective therapy for terminal respiratory failure, the demand for donor lungs has increased steadily. However, the number of donors has remained fairly constant over the years, which results in an increasing duration of waiting for lung transplantation. To overcome the lack of organs, various strategies have been developed by transplant centers including use of marginal donors. To increase the lung utilization rate in multiorgan donors, we implemented a simple lung recruitment protocol involving a brief period of controlled sustained inflation. In 2005, the lung utilization rate in the transplant program at our institution was only 20% in multiorgan donors. With the lung recruitment protocol, the rate of lung utilization for transplantation increased to 33%, in 2006, 24% in 2007, and 24% in 2008. Following the lung recruitment protocol, the arterial oxygen tension/fraction of inspired oxygen ratio increased to greater than 15% in more than 40% of donors. We were able to improve gas exchange sufficiently that as many as two-thirds of the lungs were suitable for transplantation. During the protocol, no complications were reported, and no patient became hemodynamically unstable, precluding organ procurement. We believe that optimization of multiorgan donor management with simple interventions may improve oxygenation, reducing the number of inadequate donor lungs and increasing the overall donor pool and organ availability.     

Organ donation and utilization in the United States, 2004

This article discusses issues directly related to the organ donation process, including donor consent, donor medical suitability, non-recovery of organs, organs recovered but not transplanted, expanded criteria donors (ECD), and donation after cardiac death (DCD). The findings and topics covered have important implications for how to evaluate and share best practices of organ donation as implemented by organ procurement organizations (OPOs) and major donor hospitals in the same donation service areas (DSAs). In 2002 and 2003, US hospitals referred more than one million deaths or imminent deaths to the OPOs of their DSA. Referrals increased by nearly 10% from 2002 to 2003 (1,022,280 to 1,121,392). Donor consents have increased by about 5% and the number of total deceased donors has risen from 6,187 to 6,455. Since multiple organs are recovered from most donors, this increase allowed more than 500 additional wait-listed candidates to receive an organ transplant than in the prior year. Non-traditional donor sources have experienced a large rate of increase; in 2003 the number of ECD kidney donors increased by 8% and the number of DCD donors increased by 43% , from 189 donors in year 2002 to 271 donors in 2003.     

The presence of a local lung transplant center increases lung procurement rates

BACKGROUND: The availability of cadaveric organs is the major problem in transplantation today. METHODS: A retrospective review of donors in a single organ procurement organization (OPO) was performed. Donors were divided into three eras: before, during, and after the presence of a local lung transplant program. Lung procurement rates by OPO in the United States in 1999 and 2000 were also retrospectively reviewed. RESULTS: Lung transplant rates were higher in the presence of a local lung program: 4.9% at baseline, 19.1% with a local program, and 7.1% after closure of the local lung program (P<0.01). In the United States, 12.4% of lungs available in OPOs with local lung programs are transplanted, versus 8.9% in OPOs without a local program (P<.001). CONCLUSIONS: Even if donor management protocols are maintained, closure of a local lung program decreases lung recovery rates. This observation supports the importance of maintaining local programs to maximize organ recovery rates.     

Death and the potential organ donor

There is no statutory definition of death in the UK, but death is accepted as the irreversible loss of the capacity for consciousness combined with the irreversible loss of the capacity to breathe. Brainstem death is considered equivalent to somatic death. Brainstem death testing is a formalized process divided into three stages: preconditions, exclusions and clinical testing. The confirmation of brainstem death allows for heart-beating organ donation to proceed. The increasing demand for transplantable organs has not been matched by available heart-beating organ donors, leading to renewed interest in non-heart-beating donation. Improved preservation techniques and better assessment of organ function have enabled transplant teams to procure kidneys, livers, lungs and other tissues from non-heart-beating donors. Results from transplanted kidneys show identical five-year survival for organs taken from heart-beating and non-heart-beating donors.     

History of deceased organ donation, transplantation, and organ procurement organizations

The historical development of deceased organ donation, transplantation, and organ procurement organizations is reviewed. The concept of transplantation, taking parts from one animal or person and putting them into another animal or person, is ancient. The development of organ transplantation brought on the need for a source of organs. Although many early kidney transplants used kidneys from living donors, these donors could not satisfy the ever-growing need for organs, and extrarenal organs were recovered only from deceased donors. This need for organs to satisfy the great demand led to specialized organizations to identify deceased donors, manage them until recovery occurred, and to notify transplant centers that organs were available for their patients. The functions of these organ procurement organizations expanded to include other required functions such as education, accounting, and compliance with state and federal requirements. Because of the shortage of organs relative to the demand, lack of a unified organ allocation system, the perception that organs are a national resource and should be governed by national regulations, and to improve results of organ procurement organizations and transplant centers, the federal government has regulated virtually all phases of organ procurement and transplantation.     

The reward is worth the wait: a prospective analysis of 100 consecutive organ donors

Aggressive donor management protocols have evolved to maximize the number of procured organs. Our study assessed donor management time and the number and types of organs procured with the hypothesis that shorter management time yields increased organ procurement and transplant rates. We prospectively analyzed 100 donors managed by a regional organ procurement organization (OPO) during 2007 to 2008. Data included patient demographics, number and types of organs procured and transplanted, patient management time by the OPO, and achievement of donor preprocurement goals. One hundred consecutive organ donors were managed with a mean age 41 ± 18 years and mean management time 23 ± 9 hours; 376 organs were procured and 327 successfully transplanted. Donors managed greater than 20 hours yielded significantly more heart (5 vs 26, P < 0.01) and lung (6 vs 40, P < 0.01) procurements, more organs procured per donor (3.2 ± 1.4 vs 4.2 ± 1.6, P < 0.01), and more organs transplanted per donor (2.6 ± 1.5 vs 3.7 ± 1.8, P < 0.01) than those managed 20 hours or less. No difference in the attainment of donor management goals was observed between these populations. Contrary to our initial hypothesis, donor management times greater than 20 hours yielded increased organ procurement and transplant rates, particularly for hearts and lungs, despite no differences in the achievement of donor preprocurement management goals.     

Prélèvements sur « donneurs décédés après arrêt cardiaque » : l’expérience du Samu de la Seine-Saint-Denis

The use of non-heart-beating donors (NHBD) could help shorten the list of patients who are waiting for a kidney transplant. The aim of this study was to evaluate efficiency of prehospital management of non-heart-beating donors in Seine-Saint-Denis area. We performed a retrospective cohort study of non-heart-beating donor managed by prehospital medical team of Samu 93 from February 2007 to January 2008. There were 28 non-heart-beating donors included consecutively. Twenty-five NHBD (89%) were canuled by Gillot probe within 150 min from patient collapse. Fourteen NHBD were harvested and 17 kidneys were transplanted. Six-month survival rate for NHBD grafts was 94%. In the same time, eight brain dead donors were managed by Samu 93 and were harvested leading to transplant 16 kidneys. Finally, 50% of overall kidney transplant activity in Seine-Saint-Denis was provided by NHBD grafts.     

Transformation of organ donation in China

The organ donation system in China has far lagged behind international levels. Transformation of this situation began in July 2005. A complete organ donation system that ensures fairness, impartiality, transparency, and respect for life has now been developed. This system is composed of regulations and policies, an organizational structure, operational guidelines, organ procurement organizations, registration of donors and recipients, and an organ allocation system. Since March 2010, pilot trials on donation after circulatory death (DCD) have been carried out. In 4 years, organ donation has started in 25 of 32 provinces in the country. From 2010 to 2013, the ratio of DCD liver transplantation to total case numbers in China rose from 1.38% to 26.1%, whereas for kidney, the ratio were 0.59% and 24.6%, respectively. The total number of DCD in China has accumulated to 1564 cases, and 4243 organs were transplanted. To alleviate the further difficulties of donation, establishment of professional organ procurement organizations in transplant hospitals, legislation of brain death, and promulgation of legal guidelines on DCD will be the main targets of organ donation development in China.     

OPTN/SRTR 2017 Annual Data Report: Deceased Organ Donation

SRTR uses data collected by OPTN to calculate metrics such as donation rate, organ yield, and rate of organs recovered for transplant but not transplanted. In 2017, 1,085,646 death and imminent death referrals were made to organ procurement organizations, of which 22,265 met the definition of eligible (11,673) or imminent neurological (10,592) deaths per OPTN policy. There were 10,286 deceased donors, and this number has been increasing since 2010. The number of organs authorized for recovery has also continued to increase since 2010. The recent increase may be in part due to the rising number of deaths of young individuals due to the opioid epidemic. In 2017, 4813 organs were discarded, including 3542 kidneys, 309 pancreata, 742 livers, 4 intestines, 33 hearts, and 272 lungs. These numbers suggest a need to reduce the number of organs discarded.     

Extended Criteria Donors in Liver Transplantation: Adapting Donor Quality and Recipient

Despite the progressive increase in the number of liver transplantations, the mortality on the waiting list remains between 5% and 10%, and patients have to deal with longer waiting periods. Facing this situation, transplant centers have developed alternatives to increase the number of grafts by accepting donors who were previously considered to be inadequate, because they are at higher risk of initial poor function and graft failure or may cause disease transmission. Currently, some marginal donors are being routinely used: elderly donors, steatotic grafts, non-heart-beating donors, hepatitis C virus-positive (HCV+) or hepatitis B core antibody-positive donors. These so-called marginal or extended-criteria donors were initially used in high-risk or urgent recipients; however, the number of marginal grafts has significantly increased, forcing the transplant community toward their more rationale use to maintain excellent results of liver transplantation. In this new scenario, the adequacy between donor and recipient may be paramount. Advanced donor age seems to be related to a greater graft failure rate in HCV+ recipients. Early survival seems to be significantly reduced when steatotic grafts are used in recipients with high Model for End-stage Liver Disease (MELD) scores. Moreover, a decreased survival has been observed among high-risk patients receiving organs from marginal donors. No benefit seems to exist when high-donor risk index grafts are transplanted into recipients with low MELD Scores. The recognition of various donor groups according to their quality and the need for good donor and recipient selection must lead us to define new policies for organ allocation of marginal grafts that may come into conflict with current policies of organ allocation according to the risk of death among patients awaiting a liver transplantation.     

A More Than 20% Increase in Deceased-Donor Organ Procurement and Transplantation Activity After the Use of Donation After Circulatory Death

Background

Organ procurement and transplant activity from controlled donation after circulatory death (DCD) was evaluated over an 11-year period to determine whether this program influenced the transplant and donation after brain death (DBD) activities.

Material and Methods

Deceased donor (DD) procurement and transplant data were prospectively collected in a local database for retrospective review.

Results

There was an increasing trend in the potential and actual DCD numbers over time. DCD accounted for 21.9% of the DD pool over 11 years, representing 23.7% and 24.2% of the DD kidney and liver pool, respectively. The DBD retrieval and transplant activity increased during the same time period. Mean conversion rate turning potential into effective DCD donors was 47.3%. Mean DCD donor age was 54.6 years (range, 3–83). Donors ≥60 years old made up 44.1% of the DCD pool. Among referred donors, reasons for nondonation were medical contraindications (33.7%) and family refusals (19%). Mean organ yield per DCD donor was 2.3 organs. Mean total procurement warm ischemia time was 19.5 minutes (range, 6–39). In 2012, 17 DCD and 37 DBD procurements were performed in the Liege region, which has slightly >1 million inhabitants.

Conclusions

This DCD program implementation enlarged the DD pool and did not compromise the development of DBD programs. The potential DCD pool might be underused and seems to be a valuable organ donor source.     

Renal transplantation using non-heart-beating donors: a potential solution to the organ donor shortage in Canada.

INTRODUCTION: There is a chronic shortage of cadaveric organ donors for renal transplantation, which might be solved by the use of non-heart-beating donors (patients who suffer cardiac arrest and whose kidneys are harvested subsequently when irreversible heart and respiratory function occur). We carried out a chart review to determine whether the renal transplantation rate would improve if a non-heart-beating donor program was introduced at a Canadian centre. METHODS: We reviewed the charts of all 1547 patients who died in the emergency department or intensive care unit of the Ottawa Hospital, a tertiary care centre serving 1.2 million people in eastern Ontario, between January 1999 and May 2001. The number of potential non-heart-beating donors was determined by the use of predefined criteria. The number of additional kidneys that could be obtained with a non-heart-beating donor program was estimated and compared to the actual number of kidneys procured from conventional brain-dead donors during the same period. The potential increase in the renal transplantation rate was calculated. RESULTS: There were 83 potential non-heart-beating donors during the 29-month study period. The mean (and standard deviation) age of the donors was 40.6 (13.1) years, and 20% were female. The mean serum creatinine value was 75 (29) micromol/L; 44.6% of donors died secondary to trauma. We estimated that the use of non-heart-beating donors would have provided 14 to 41 additional donors during the study period (12-34 kidneys/yr). The cadaveric renal transplantation rate would have increased between 30% and 87%. CONCLUSION: The cadaveric renal transplantation rate could improve significantly if non-heart-beating donors were used in Canadian hospitals.     

Overview of the Belgian donor and transplant statistics 2006: results of consecutive yearly data follow-up by the Belgian Section of Transplant Coordinators

BACKGROUND: The Belgian Section of Transplant Coordinators, created in 1997 under the auspices of the Belgian Transplant Society, is in charge of the collection of the national data about donor/procurement activities. METHODS: Data are collected in all Belgian transplant centers. An annual report is finalized by combining these data with data from the Eurotransplant database. RESULTS: An increase of both potential donors (n = 501, +14.4%) and effective donors (n = 273, +16.7%) was observed in 2006 versus 2005. Among effective donors, 28 were non-heart-beating donors (10.25%). Overall donor ratio was 26.26 donors per million inhabitants. Within potential donors, absence of organ harvesting was due to medical contraindications (28%), family refusal (13%), or legal refusal (2%). Donor mean age was 46.4 years and mean organs/donor was 3.21 +/- 1.7. An overall reduction of Belgian waiting lists was observed in 2006 as compared with 2005 (-5.7% for kidney, -25.7% for liver, -9.4% for heart, -6.7% for lung, and -11.7% for pancreas), while waiting list mortality was 18% for liver, 11% for heart, and 7% for lung. As compared with 2005, transplant activities increased for kidney (n = 485, +24.3%), heart +/- lungs (n = 73, +7.3%), and lungs (n = 83, +39.4%) but decreased for liver (n = 236, -2.1%). Living donation represented 8.45% for kidney (+28.1% vs 2005) and 8% for liver transplantation (-29.6%). CONCLUSION: Globally, a marked increase of procurement and transplant activities was observed in 2006, allowing to limit waiting list and waiting list mortality. Further increase of living donor activity and non-heart-beating donation remains necessary to extend the donor pool.     

Prélèvement de reins chez un donneur à cœur arrêté

Brain death occurred in a 47-year-old head trauma patient following 5 days of intensive care. The procedure for multiple organ procurement was initiated. Irreversible cardiac arrest had occurred during the period in the surgical intensive therapy unit. External cardiac massage and mechanical ventilation were maintained until in situ cooling of the kidneys was achieved. The patient was taken to the operating room for nephrectomy. Both kidneys were transplanted with a favourable outcome. Procurement of kidneys from non-heart-beating donors could increase the number of available grafts for transplantation.     

Donor selection criteria for liver transplantation in Argentina: are current standards too rigorous?

Organ shortage is the major limitation for the growth of deceased donor liver transplant worldwide. One strategy to ameliorate this problem is to maximize the liver utilization rate. To assess predictors of liver utilization in Argentina. The national database was used to analyze transplant activity in 2010. Donor, recipient, and transplant variables were evaluated as predictors of graft utilization of number of rejected donor offers before grafting and with the occurrence of primary nonfunction (PNF) or early post‐transplant mortality (EM). Of the 582 deceased donors, 293 (50.3%) were recovered for liver transplant. Variables associated with the nonrecovery of the liver were age ≥46 years, umbilical perimeter ≥92 cm, organ procurement outside Gran Buenos Aires, AST ≥42 U/l and ALT ≥29 U/l. The median number of rejected offers before grafting was 4, and in 71 patients (25%), there were ≥13. The only independent predictor for the occurrence of PNF (3.4%) or EM (5.2%) was the recipient's emergency status. During 2010 in Argentina, the liver was recovered in only half of donors. The low incidence of PNF and EM and the characteristics of the nonrecovered liver donors suggest that organ acceptance criteria should be less rigorous.