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Guarino M, Cossiga V, Becchetti C, Invernizzi F, Lapenna L, Lavezzo B, Lenci I, Merli M, Pasulo L, Zanetto A, Burra P, Morisco F. Sarcopenia in chronic advanced liver diseases: A sex-oriented analysis of the literature. Dig Liver Dis 2022; 54:997-1006. [PMID: 34789397 DOI: 10.1016/j.dld.2021.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 09/29/2021] [Accepted: 10/25/2021] [Indexed: 12/12/2022]
Abstract
Sarcopenia, defined as progressive and generalized loss of muscle mass and strength, is common in chronic liver disease. It significantly impacts the quality of life and increases the risk of liver-related complications and mortality in cirrhotic patients. Moreover, recent studies showed a negative impact of sarcopenia on patients awaiting liver transplantation (LT), on post-LT outcomes, and on response to hepatocellular carcinoma therapies. Data about the influence of sex on the incidence, prevalence, diagnosis and treatment of sarcopenia in chronic liver diseases are poor and conflicting. The aims of this review of the literature are to define sex differences in sarcopenic cirrhotic patients and to highlight the necessity of a sex stratified analysis in future studies. This analysis of the literature showed that most of the studies are retrospective, with a higher prevalence of sarcopenia in males, probably due to anatomical differences between the sexes. Moreover, diagnostic criteria for sarcopenia are different between studies, as there is not a defined cut-off and, as a consequence, no comparable results. In conclusion, sex seems to have an impact on sarcopenia, and future studies must accurately investigate its role in identifying and treating high-risk patients, reducing the negative impact of sarcopenia on the survival and quality of life of cirrhotic patients.
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Affiliation(s)
- Maria Guarino
- Department of Clinical Medicine and Surgery, Gastroenterology Unit, University of Napoli Federico II", Via S. Pansini, 5, Napoli 80131, Italy
| | - Valentina Cossiga
- Department of Clinical Medicine and Surgery, Gastroenterology Unit, University of Napoli Federico II", Via S. Pansini, 5, Napoli 80131, Italy.
| | - Chiara Becchetti
- Hepatology, Department of Biomedical Research, University of Bern, Switzerland; University Clinic for Visceral Surgery and Medicine, Inselspital, University Hospital Bern, Bern, Switzerland; Multivisceral Transplant Unit, Gastroenterology, Department of Surgery, Oncology and Gastroenterology, Padua University Hospital, Padua, Italy
| | - Federica Invernizzi
- Division of Gastroenterology and Hepatology, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Lucia Lapenna
- Department of Translational and Precision Medicine, Gastroenterology and Hepatology Unit, Sapienza University of Rome, Rome, Italy
| | - Bruna Lavezzo
- Anesthesia and Intensive Care Unit 2, Liver Transplant Center, A.O.U. Città della Salute e della Scienza, Turin, Italy
| | - Ilaria Lenci
- Department of Surgery Science, Hepatology and Liver Transplant Unit, Tor Vergata University, Rome, Italy
| | - Manuela Merli
- Department of Translational and Precision Medicine, Gastroenterology and Hepatology Unit, Sapienza University of Rome, Rome, Italy
| | - Luisa Pasulo
- Department of Clinical Medicine, Gastroenterology-Transplant Hepatology, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - Alberto Zanetto
- Multivisceral Transplant Unit, Gastroenterology, Department of Surgery, Oncology and Gastroenterology, Padua University Hospital, Padua, Italy
| | - Patrizia Burra
- Multivisceral Transplant Unit, Gastroenterology, Department of Surgery, Oncology and Gastroenterology, Padua University Hospital, Padua, Italy
| | - Filomena Morisco
- Department of Clinical Medicine and Surgery, Gastroenterology Unit, University of Napoli Federico II", Via S. Pansini, 5, Napoli 80131, Italy
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Roullet S, Defaye M, Quinart A, Adam JP, Chiche L, Laurent C, Neau-Cransac M. Liver Transplantation With Old Grafts: A Ten-Year Experience. Transplant Proc 2018; 49:2135-2143. [PMID: 29149974 DOI: 10.1016/j.transproceed.2017.07.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 06/18/2017] [Accepted: 07/30/2017] [Indexed: 02/09/2023]
Abstract
BACKGROUND The persistent scarcity of donors has prompted liver transplantation teams to find solutions for increasing graft availability. We report our experience of liver transplantations performed with grafts from older donors, specifically over 70 and 80 years old. PATIENTS AND METHODS We analyzed our prospectively maintained single-center database from January 1, 2005, to December 31, 2014, with 380 liver transplantations performed in 354 patients. Six groups were composed according to donor age: <40 (n = 84), 40 to 49 (n = 67), from 50 to 59 (n = 62), from 60 to 69 (n = 76), from 70 to 79 (n = 64), and ≥80 years (n = 27). RESULTS Donors <40 years of age had a lower body mass index, died more often from trauma, and more often had cardiac arrest and high transaminase levels. In contrast, older donors (≥70 years of age) died more often from stroke. Recipients of grafts from donors <50 years of age were more frequently infected by hepatitis C virus; recipients of oldest grafts more often had hepatocellular carcinoma. Cold ischemia time was the shortest in donors >80 years of age. Patient survival was not significantly different between the groups. In multivariate analysis, factors predicting graft loss were transaminase peak, retransplantation and cold ischemia time but not donor age. CONCLUSIONS Older donors >70 and >80 years of age could provide excellent liver grafts.
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Affiliation(s)
- S Roullet
- Department of Anesthesia and Intensive Care and Liver Transplantation Unit, Bordeaux, France; Inserm UMR 12-11, Bordeaux, France.
| | - M Defaye
- Department of Anesthesia and Intensive Care and Liver Transplantation Unit, Bordeaux, France
| | - A Quinart
- Department of Anesthesia and Intensive Care and Liver Transplantation Unit, Bordeaux, France
| | - J-P Adam
- Department of Digestive Surgery and Liver Transplantation Unit, CHU Bordeaux, Hôpital Haut-Lévêque, Pessac, France
| | - L Chiche
- Department of Digestive Surgery and Liver Transplantation Unit, CHU Bordeaux, Hôpital Haut-Lévêque, Pessac, France
| | - C Laurent
- Department of Digestive Surgery and Liver Transplantation Unit, CHU Bordeaux, Hôpital Haut-Lévêque, Pessac, France
| | - M Neau-Cransac
- Department of Hepatology and Liver Transplantation Unit, CHU Bordeaux, Hôpital Haut-Lévêque, Pessac, France
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Pan ET, Yoeli D, Galvan NTN, Kueht ML, Cotton RT, O'Mahony CA, Goss JA, Rana A. Cold ischemia time is an important risk factor for post-liver transplant prolonged length of stay. Liver Transpl 2018; 24:762-768. [PMID: 29476693 DOI: 10.1002/lt.25040] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 01/03/2018] [Accepted: 01/21/2018] [Indexed: 12/11/2022]
Abstract
Risk analysis of cold ischemia time (CIT) in liver transplantation has largely focused on patient and graft survival. Posttransplant length of stay is a sensitive marker of morbidity and cost. We hypothesize that CIT is a risk factor for posttransplant prolonged length of stay (PLOS) and aim to conduct an hour-by-hour analysis of CIT and PLOS. We retrospectively reviewed all adult, first-time liver transplants between March 2002 and September 2016 in the United Network for Organ Sharing database. The 67,426 recipients were categorized by hourly CIT increments. Multivariate logistic regression of PLOS (defined as >30 days), CIT groups, and an extensive list of confounding variables was performed. Linear regression between length of stay and CIT as continuous variables was also performed. CIT 1-6 hours was protective against PLOS, whereas CIT >7 hours was associated with increased odds for PLOS. The lowest odds for PLOS were observed with 1-2 hours (odds ratio [OR], 0.65; 95% confidence interval [CI], 0.45-0.92) and 2-3 hours (OR, 0.65; 95% CI, 0.55-0.78) of CIT. OR for PLOS steadily increased with increasing CIT, reaching the greatest odds for PLOS with 13-14 hours (OR, 2.05; 95% CI, 1.57-2.67) and 15-16 hours (OR, 2.06; 95% CI, 1.27-3.33) of CIT. Linear regression revealed a positive correlation between length of stay and CIT with a correlation coefficient of +0.35 (P < 0.001). In conclusion, post-liver transplant length of stay is sensitive to CIT, with a substantial increase in the odds of PLOS observed with nearly every additional hour of cold ischemia. We conclude that CIT should be minimized to protect against the morbidity and cost associated with posttransplant PLOS. Liver Transplantation 24 762-768 2018 AASLD.
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Affiliation(s)
- Evelyn T Pan
- Michael E. DeBakey Department of Surgery, Division of Abdominal Transplantation, Baylor College of Medicine, Houston, TX
| | - Dor Yoeli
- Michael E. DeBakey Department of Surgery, Division of Abdominal Transplantation, Baylor College of Medicine, Houston, TX
| | - N Thao N Galvan
- Michael E. DeBakey Department of Surgery, Division of Abdominal Transplantation, Baylor College of Medicine, Houston, TX
| | - Michael L Kueht
- Michael E. DeBakey Department of Surgery, Division of Abdominal Transplantation, Baylor College of Medicine, Houston, TX
| | - Ronald T Cotton
- Michael E. DeBakey Department of Surgery, Division of Abdominal Transplantation, Baylor College of Medicine, Houston, TX
| | - Christine A O'Mahony
- Michael E. DeBakey Department of Surgery, Division of Abdominal Transplantation, Baylor College of Medicine, Houston, TX
| | - John A Goss
- Michael E. DeBakey Department of Surgery, Division of Abdominal Transplantation, Baylor College of Medicine, Houston, TX
| | - Abbas Rana
- Michael E. DeBakey Department of Surgery, Division of Abdominal Transplantation, Baylor College of Medicine, Houston, TX
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Pozo-Laderas JC, Rodríguez-Perálvarez M, Muñoz-Villanueva MC, Rivera-Espinar F, Durban-García I, Muñoz-Trujillo J, Robles-Arista JC, Briceño-Delgado J. Pretransplant predictors of early mortality in adult recipients of liver transplantation in the MELD-Na Era. Med Intensiva 2018; 43:261-269. [PMID: 29735173 DOI: 10.1016/j.medin.2018.03.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 03/26/2018] [Accepted: 03/31/2018] [Indexed: 12/28/2022]
Abstract
AIMS To identify pretransplant predictors of early mortality (90 days after transplantation) and evaluate their discriminating capacity in adult liver transplant recipients (LTR). DESIGN An observational, retrospective, nested cases-controls study from a consecutive cohort of LTRs was carried out. SETTING University hospital. PATIENTS All consecutive LTR between January 2003 and December 2016 were eligible for inclusion. Patients with acute liver failure, previous graft dysfunction, simultaneous multiple organ transplantation, non-heart beating donors, and those needing urgent retransplantation during the study period were excluded. The analysis comprised 471 patients. MAIN VARIABLES OF INTEREST Pretransplant characteristics were the main variables of interest. The LTR were grouped according to the dependent variable (early mortality). Multivariate logistic regression analysis was conducted to identify predictors of early mortality. The discriminating capacity of the models obtained was evaluated by comparing ROC curves (models versus MELD-Na). RESULTS The MELD-Na score (OR = 1.069, 95% CI = 1.014-1.127), age > 60 years (OR = 2.479, 95% CI = 1.226-5.015), and LTR height < 163cm (OR = 4.092, 95% CI = 2.115-7.917) were identified as independent predictors of early mortality. The cause of transplantation (hepatocellular carcinoma or decompensated cirrhosis) was identified as a confounding factor. CONCLUSIONS In LTR due to decompensated cirrhosis, the MELD-Na score, age > 60 years, and height < 163cm are independent predictors of early mortality. These factors provide a better classification model than the MELD-Na score for early post-transplant mortality.
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Affiliation(s)
- J C Pozo-Laderas
- UCG Medicina Intensiva, Hospital Universitario Reina Sofía, Córdoba, España; Instituto Maimónides de Investigación Biomédica IMIBIC, Córdoba, España.
| | - M Rodríguez-Perálvarez
- UGC Aparato Digestivo, Hospital Universitario Reina Sofía, Córdoba, España; Instituto Maimónides de Investigación Biomédica IMIBIC, Córdoba, España
| | - M C Muñoz-Villanueva
- Unidad de Bioestadística Médica, Instituto Maimónides de Investigación Biomédica IMIBIC, Córdoba, España
| | - F Rivera-Espinar
- UCG Medicina Intensiva, Hospital Universitario Reina Sofía, Córdoba, España
| | - I Durban-García
- UCG Medicina Intensiva, Hospital Universitario Reina Sofía, Córdoba, España
| | - J Muñoz-Trujillo
- UCG Medicina Intensiva, Hospital Universitario Reina Sofía, Córdoba, España
| | - J C Robles-Arista
- UCG Medicina Intensiva, Hospital Universitario Reina Sofía, Córdoba, España; Instituto Maimónides de Investigación Biomédica IMIBIC, Córdoba, España
| | - J Briceño-Delgado
- UGC Cirugía General, Hospital Universitario Reina Sofía, Córdoba, España; Instituto Maimónides de Investigación Biomédica IMIBIC, Córdoba, España
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de Paiva Haddad LB, Ducatti L, Mendes LRBC, Andraus W, D’Albuquerque LAC. Predictors of micro-costing components in liver transplantation. Clinics (Sao Paulo) 2017; 72:333-342. [PMID: 28658432 PMCID: PMC5463250 DOI: 10.6061/clinics/2017(06)02] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 02/14/2017] [Indexed: 12/23/2022] Open
Abstract
OBJECTIVES: Although liver transplantation procedures are common and highly expensive, their cost structure is still poorly understood. This study aimed to develop models of micro-costs among patients undergoing liver transplantation procedures while comparing the role of individual clinical predictors using tree regression models. METHODS: We prospectively collected micro-cost data from patients undergoing liver transplantation in a tertiary academic center. Data collection was conducted using an Intranet registry integrated into the institution's database for the storing of financial and clinical data for transplantation cases. RESULTS: A total of 278 patients were included and accounted for 300 procedures. When evaluating specific costs for the operating room, intensive care unit and ward, we found that in all of the sectors but the ward, human resources were responsible for the highest costs. High cost supplies were important drivers for the operating room, whereas drugs were among the top four drivers for all sectors. When evaluating the predictors of total cost, a MELD score greater than 30 was the most important predictor of high cost, followed by a Donor Risk Index greater than 1.8. CONCLUSION: By focusing on the highest cost drivers and predictors, hospitals can initiate programs to reduce cost while maintaining high quality care standards.
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Affiliation(s)
- Luciana Bertocco de Paiva Haddad
- Divisao de Transplante de Figado e Orgaos do Aparelho Digestivo, Departamento de Gastroenterologia, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, SP, BR
- *Corresponding author. E-mail:
| | - Liliana Ducatti
- Divisao de Transplante de Figado e Orgaos do Aparelho Digestivo, Departamento de Gastroenterologia, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, SP, BR
| | - Luana Regina Baratelli Carelli Mendes
- Divisao de Transplante de Figado e Orgaos do Aparelho Digestivo, Departamento de Gastroenterologia, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, SP, BR
| | - Wellington Andraus
- Divisao de Transplante de Figado e Orgaos do Aparelho Digestivo, Departamento de Gastroenterologia, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, SP, BR
| | - Luiz Augusto Carneiro D’Albuquerque
- Divisao de Transplante de Figado e Orgaos do Aparelho Digestivo, Departamento de Gastroenterologia, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, SP, BR
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Tovikkai C, Charman SC, Praseedom RK, Gimson AE, van der Meulen J. Time spent in hospital after liver transplantation: Effects of primary liver disease and comorbidity. World J Transplant 2016; 6:743-750. [PMID: 28058226 PMCID: PMC5175234 DOI: 10.5500/wjt.v6.i4.743] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 09/28/2016] [Accepted: 11/02/2016] [Indexed: 02/05/2023] Open
Abstract
AIM To explore the effect of primary liver disease and comorbidities on transplant length of stay (TLOS) and LOS in later admissions in the first two years after liver transplantation (LLOS).
METHODS A linked United Kingdom Liver Transplant Audit - Hospital Episode Statistics database of patients who received a first adult liver transplant between 1997 and 2010 in England was analysed. Patients who died within the first two years were excluded from the primary analysis, but a sensitivity analysis was also performed including all patients. Multivariable linear regression was used to evaluate the impact of primary liver disease and comorbidities on TLOS and LLOS.
RESULTS In 3772 patients, the mean (95%CI) TLOS was 24.8 (24.2 to 25.5) d, and the mean LLOS was 24.2 (22.9 to 25.5) d. Compared to patients with cancer, we found that the largest difference in TLOS was seen for acute hepatic failure group (6.1 d; 2.8 to 9.4) and the largest increase in LLOS was seen for other liver disease group (14.8 d; 8.1 to 21.5). Patients with cardiovascular disease had 8.5 d (5.7 to 11.3) longer TLOS and 6.0 d (0.2 to 11.9) longer LLOS, compare to those without. Patients with congestive cardiac failure had 7.6 d longer TLOS than those without. Other comorbidities did not significantly increase TLOS nor LLOS.
CONCLUSION The time patients spent in hospital varied according to their primary liver disease and some comorbidities. Time spent in hospital of patients with cancer was relatively short compared to most other indications. Cardiovascular disease and congestive cardiac failure were the comorbidities with a strong impact on increased LOS.
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Decade-Long Trends in Liver Transplant Waitlist Removal Due to Illness Severity: The Impact of Centers for Medicare and Medicaid Services Policy. J Am Coll Surg 2016; 222:1054-65. [PMID: 27178368 DOI: 10.1016/j.jamcollsurg.2016.03.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 03/02/2016] [Accepted: 03/02/2016] [Indexed: 02/06/2023]
Abstract
BACKGROUND The central tenet of liver transplant organ allocation is to prioritize the sickest patients first. However, a 2007 Centers for Medicare and Medicaid Services regulatory policy, Conditions of Participation (COP), which mandates publically reported transplant center performance assessment and outcomes-based auditing, critically altered waitlist management and clinical decision making. We examine the extent to which COP implementation is associated with increased removal of the "sickest" patients from the liver transplant waitlist. STUDY DESIGN This study included 90,765 adult (aged 18 years and older) deceased donor liver transplant candidates listed at 102 transplant centers from April 2002 through December 2012 (Scientific Registry of Transplant Recipients). We quantified the effect of COP implementation on trends in waitlist removal due to illness severity and 1-year post-transplant mortality using interrupted time series segmented Poisson regression analysis. RESULTS We observed increasing trends in delisting due to illness severity in the setting of comparable demographic and clinical characteristics. Delisting abruptly increased by 16% at the time of COP implementation, and likelihood of being delisted continued to increase by 3% per quarter thereafter, without attenuation (p < 0.001). Results remained consistent after stratifying on key variables (ie, Model for End-Stage Liver Disease and age). The COP did not significantly impact 1-year post-transplant mortality (p = 0.38). CONCLUSIONS Although the 2007 Centers for Medicare and Medicaid Services COP policy was a quality initiative designed to improve patient outcomes, in reality, it failed to show beneficial effects in the liver transplant population. Patients who could potentially benefit from transplantation are increasingly being denied this lifesaving procedure while transplant mortality rates remain unaffected. Policy makers and clinicians should strive to balance candidate and recipient needs from a population-benefit perspective when designing performance metrics and during clinical decision making for patients on the waitlist.
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Pardo F, Pons JA, Briceño J. V Reunión de Consenso de la Sociedad Española de Trasplante Hepático sobre receptores de riesgo elevado, escenarios actuales de inmunosupresión y manejo del hepatocarcinoma en espera de trasplante. Cir Esp 2015; 93:619-37. [DOI: 10.1016/j.ciresp.2015.04.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 04/17/2015] [Indexed: 12/11/2022]
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9
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V Reunión de Consenso de la Sociedad Española de Trasplante Hepático sobre receptores de riesgo elevado, escenarios actuales de inmunosupresión y manejo del hepatocarcinoma en espera de trasplante. GASTROENTEROLOGIA Y HEPATOLOGIA 2015; 38:600-18. [DOI: 10.1016/j.gastrohep.2015.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 06/11/2015] [Accepted: 06/30/2015] [Indexed: 12/14/2022]
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Umgelter KS, Tobiasch M, Anetsberger A, Blobner M, Thorban S, Umgelter A. Donor organ distribution according to urgency of need or outcome maximization in liver transplantation. A questionnaire survey among patients and medical staff. Transpl Int 2015; 28:448-54. [PMID: 25557453 DOI: 10.1111/tri.12512] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 11/03/2014] [Accepted: 12/30/2014] [Indexed: 12/16/2022]
Abstract
Low donor rates in Germany cause a trade-off between equity in the distribution of chances for survival and efficiency in dead-donor liver transplantation. Public attitudes concerning the principles that should govern organ allocation are of interest. We performed a questionnaire-based study among patients and medical staff. 1826 of 2200 questionnaires were returned. 79.2%, 67.1%, and 24.4% patients wanted to accept liver transplantation for themselves if expected 1-year survival was 80%, 50%, and 20%, respectively. 57.7% affirmed 'averting immediate risk of death (urgency) is a more important criterion for organ allocation than expected long-term success' (P = 0.002 against indifference). The majority of medical staff took the opposite decision. 20.7%, 8.8%, and 21.2% of patients chose 50%, 33%, and 10% as lowest acceptable 5-year survival, respectively. 49.3% accepted a survival of <10%. Variables associated with preferring urgency over efficiency as criterion for allocation were age (OR 1.009; 95% CI: 1.000-1.017; female gender (OR 1.331; 95%CI 0.992-1.784); higher education (OR 0.881; 95%CI 0.801-0.969); and refusal of transplantation for oneself (OR 1.719; 95%CI 1.272-2.324). Most patients supported urgency-based liver allocation. Patients and medical staff would accept lower survival rates than the transplant community.
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Affiliation(s)
- Katrin S Umgelter
- Klinik für Anästhesiologie, Klinikum rechts der Isar der Technischen Universität München, München, Germany
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