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Isha S, Jenkins AS, Hanson AJ, Satashia PH, Narra SA, Mundhra GD, Hasan MM, Donepudi A, Giri A, Johnson PW, Villar D, Santos C, Canabal J, Lowman P, Franco PM, Sanghavi DK. The Effect of Molecular Adsorbent Recirculating System in Patients With Liver Failure: A Case Series of 44 Patients. Transplant Proc 2023; 55:2126-2133. [PMID: 37806867 DOI: 10.1016/j.transproceed.2023.07.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 06/19/2023] [Accepted: 07/04/2023] [Indexed: 10/10/2023]
Abstract
BACKGROUND Liver failure is associated with a high mortality rate, with many patients requiring transplant for definitive treatment. The Molecular Adsorbent Recirculating System (MARS) is a nonbiologic system that provides extracorporeal support. Literature on MARS therapy is mixed: outcomes support MARS therapy for patients with isolated acute liver failure, but data on patients with chronic disease is varied. Several case studies report success using MARS as a bridging treatment for patients awaiting transplant. The purpose of this case series is to present the outcomes of 44 patients who underwent MARS therapy for liver failure, 19 of whom used MARS therapy as a bridging therapy to transplant. METHODS This study retrospectively identified 44 patients who underwent MARS therapy for liver failure at Mayo Clinic, Jacksonville, between January 2014 and April 2021. Variables of interest included changes in laboratory markers of hepatic functioning, number and length of MARS therapy sessions, transplantation status, and mortality. RESULTS Following MARS therapy, there were improvements in mean serum bilirubin, ammonia, urea, creatinine, International Normalized Ratio, alanine aminotransferase, and aspartate aminotransferase levels. Twenty-seven patients (61.36%) survived the hospital stay; 17 (38.63%) died in the hospital. The majority of surviving patients (n = 19; 73.07%) received liver transplant. Six did not require transplant (22.22%). All but 1 patient who received MARS as a bridging treatment to transplant survived the follow-up period (n = 18; 94.74%). CONCLUSIONS Outcomes of these 44 cases suggest that MARS improves liver failure-associated laboratory parameters and may be effective therapy as a bridge to liver transplant.
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Affiliation(s)
- Shahin Isha
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Anna S Jenkins
- Mayo Clinic Alix School of Medicine, Jacksonville, Florida
| | - Abby J Hanson
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | | | - Sai Abhishek Narra
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Gunjan D Mundhra
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | | | - Ashrita Donepudi
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Abishek Giri
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Patrick W Johnson
- Department of Quantitative Health Sciences, Mayo Clinic, Jacksonville, Florida
| | - Dolores Villar
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Christan Santos
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Juan Canabal
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Philip Lowman
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida
| | - Pablo Moreno Franco
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida; Department of Transplantation, Mayo Clinic, Jacksonville, Florida
| | - Devang K Sanghavi
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, Florida.
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2
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Sommerfeld O, Neumann C, Becker J, von Loeffelholz C, Roth J, Kortgen A, Bauer M, Sponholz C. Extracorporeal albumin dialysis in critically ill patients with liver failure: Comparison of four different devices-A retrospective analysis. Int J Artif Organs 2023; 46:481-491. [PMID: 37609875 PMCID: PMC10483887 DOI: 10.1177/03913988231191952] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 06/26/2023] [Indexed: 08/24/2023]
Abstract
BACKGROUND Besides standard medical therapy and critical care monitoring, extracorporeal liver support may provide a therapeutic option in patients with liver failure. However, little is known about detoxification capabilities, efficacy, and efficiency among different devices. METHODS Retrospective single-center analysis of patients treated with extracorporeal albumin dialysis. Generalized Estimating Equations with robust variance estimator were used to account for repeated measurements of several cycles and devices per patient. RESULTS Between 2015 and 2021 n = 341 cycles in n = 96 patients were eligible for evaluation, thereof n = 54 (15.8%) treatments with Molecular Adsorbent Recirculating System, n = 64 (18.7%) with OpenAlbumin, n = 167 (48.8%) Advanced Organ Support treatments, and n = 56 (16.4%) using Single Pass Albumin Dialysis. Albumin dialysis resulted in significant bilirubin reduction without differences between the devices. However, ammonia levels only declined significantly in ADVOS and OPAL. First ECAD cycle was associated with highest percentage reduction in serum bilirubin. With the exception of SPAD all devices were able to remove the water-soluble substances creatinine and urea and stabilized metabolic dysfunction by increasing pH and negative base excess values. Platelets and fibrinogen levels frequently declined during treatment. Periprocedural bleeding and transfusion of red blood cells were common findings in these patients. CONCLUSIONS From this clinical perspective ADVOS and OPAL may provide higher reduction capabilities of liver solutes (i.e. bilirubin and ammonia) in comparison to MARS and SPAD. However, further prospective studies comparing the effectiveness of the devices to support liver impairment (i.e. bile acid clearance or albumin binding capacity) as well as markers of renal recovery are warranted.
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Affiliation(s)
- Oliver Sommerfeld
- Department of Anaesthesiology and Critical Care Medicine, Friedrich-Schiller-University Jena, Jena University Hospital, Jena, Thuringia, Germany
| | - Caroline Neumann
- Department of Anaesthesiology and Critical Care Medicine, Friedrich-Schiller-University Jena, Jena University Hospital, Jena, Thuringia, Germany
| | - Jan Becker
- Department of Anaesthesiology and Critical Care Medicine, Friedrich-Schiller-University Jena, Jena University Hospital, Jena, Thuringia, Germany
| | - Christian von Loeffelholz
- Department of Anaesthesiology and Critical Care Medicine, Friedrich-Schiller-University Jena, Jena University Hospital, Jena, Thuringia, Germany
| | - Johannes Roth
- Department of Anaesthesiology and Critical Care Medicine, Friedrich-Schiller-University Jena, Jena University Hospital, Jena, Thuringia, Germany
| | - Andreas Kortgen
- Department of Anaesthesiology and Critical Care Medicine, Friedrich-Schiller-University Jena, Jena University Hospital, Jena, Thuringia, Germany
| | - Michael Bauer
- Department of Anaesthesiology and Critical Care Medicine, Friedrich-Schiller-University Jena, Jena University Hospital, Jena, Thuringia, Germany
| | - Christoph Sponholz
- Department of Anaesthesiology and Critical Care Medicine, Friedrich-Schiller-University Jena, Jena University Hospital, Jena, Thuringia, Germany
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3
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Kidney Replacement Therapy in Patients with Acute Liver Failure and End-Stage Cirrhosis Awaiting Liver Transplantation. Clin Liver Dis 2022; 26:245-253. [PMID: 35487608 DOI: 10.1016/j.cld.2022.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Providing dialysis to patients with liver failure is challenging because of their tenuous hemodynamics and refractory ascites. With better machinery and increased availability, continuous kidney replacement therapy has been successfully delivered to acutely ill patients in liver failure over the past few decades. Intermittent hemodialysis continues to remain the modality of choice outside the intensive care unit and on occasion needs to be complemented with paracentesis. Peritoneal dialysis has not been widely used, but recent literature shows promising outcomes barring for publication bias. Albumin dialysis could be a lifesaving procedure for a carefully selected subgroup of patients with liver failure.
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4
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Yoo SW, Ki MJ, Kim D, Kim SK, Park S, Han HJ, Lee HB. Bleeding complications associated with the molecular adsorbent recirculating system: a retrospective study. Acute Crit Care 2022; 36:322-331. [PMID: 35263827 PMCID: PMC8907459 DOI: 10.4266/acc.2021.00276] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 08/25/2021] [Indexed: 01/15/2023] Open
Abstract
Background The molecular adsorbent recirculating system (MARS) is a hepatic replacement system that supports excretory liver function in patients with liver failure. However, since MARS has been employed in our hospital, bleeding complications have occurred in many patients during or after MARS. The objective of this study was to determine how MARS affects coagulopathy and identify specific factors associated with bleeding complications. Methods We retrospectively analyzed data from 17 patients undergoing a total of 41 MARS sessions. Complete blood count, coagulation profiles, and blood chemistry values were compared before and after MARS. To identify pre-MARS factors associated with increased bleeding after MARS, we divided patients into bleeder and non-bleeder groups and compared their pre-MARS laboratory values. Results MARS significantly reduced bilirubin and creatinine levels. MARS also increased prothrombin time and reduced platelet and fibrinogen, thus negatively impacting coagulation. Pre-MARS hemoglobin was significantly lower in the bleeder group than in the non-bleeder group (P=0.015). When comparing the upper and lower 33% of MARS sessions based on the hemoglobin reduction rate, hemoglobin reduction was significantly greater in MARS sessions involving patients with low pre-MARS international normalized ratio of prothrombin time (PT-INR) and factor V (P=0.038 and P=0.023, respectively). Conclusions MARS could appears to alter coagulation-related factors such as factor V and increase the risk of bleeding complications particularly in patient with low hemoglobin. However, individual differences among patients were large, and various factors, such as low hemoglobin, PT-INR, and factor V levels, appear to be involved.
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Affiliation(s)
- Seon Woo Yoo
- Department of Anesthesiology and Pain Medicine, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea.,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
| | - Min-Jong Ki
- Department of Anesthesiology and Pain Medicine, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea.,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
| | - Dal Kim
- Department of Anesthesiology and Pain Medicine, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea
| | - Seul Ki Kim
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea.,Humidifier Disinfectant Health Center, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea
| | - SeungYong Park
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea.,Humidifier Disinfectant Health Center, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea.,Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Research Center for Pulmonary Disorders, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea
| | - Hyo Jin Han
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea.,Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Research Center for Pulmonary Disorders, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea
| | - Heung Bum Lee
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea.,Humidifier Disinfectant Health Center, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea.,Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Research Center for Pulmonary Disorders, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea
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5
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Falkensteiner C, Kortgen A, Leonhardt J, Bauer M, Sponholz C. Comparison of albumin dialysis devices molecular adsorbent recirculating system and ADVanced Organ Support system in critically ill patients with liver failure-A retrospective analysis. Ther Apher Dial 2020; 25:225-236. [PMID: 32515160 DOI: 10.1111/1744-9987.13533] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 06/03/2020] [Accepted: 06/03/2020] [Indexed: 01/20/2023]
Abstract
Extracorporeal albumin dialysis (ECAD) represents a supplemental therapy for patients with liver failure. Most experience was gained with the molecular adsorbent recirculating system (MARS). However, the ADVanced Organ Support (ADVOS) system was recently introduced. This study aims to compare effects of MARS and ADVOS on biochemical and clinical parameters in critically ill patients with liver failure using a retrospective analysis of ECAD at Jena University Hospital. Laboratory parameters, health scoring values, and need for transfusion were recorded before and after treatment. Generalized estimating equations were used to account for repeated measurements of multiple ECAD cycles per patient. Between 2012 and 2017, n = 75 MARS and n = 58 ADVOS cycles were evaluated. Although ADVOS runs significantly longer, both devices provided comparable reduction rates of bilirubin (MARS: -48 [-80.5 to -18.5] μmol/L vs ADVOS: -35 [-87.8 to -2.0] μmol/L, P = .194), a surrogate for detoxification capacity, while urea and lactate levels were more significantly lowered by the ADVOS system. In cycles with similar treatment times, both systems provided comparable reduction rates for bilirubin, renal replacement, coagulation, and metabolic parameters. Citrate was the preferred anticoagulant in case of bleeding. Neither bleeding tendency nor fibrinogen levels or platelets were altered by the type of anticoagulation. No adverse events were reported, but two sessions (one MARS and one ADVOS) were terminated early due to filter clotting. Experience is needed in the application of ADVOS and more prospective trials comparing the detoxification capacity of ECAD devices are needed to support and enlarge the findings of the current evaluation.
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Affiliation(s)
- Christoph Falkensteiner
- Department of Anesthesiology and Intensive Care Medicine, Jena University Hospital, Jena, Germany
| | - Andreas Kortgen
- Department of Anesthesiology and Intensive Care Medicine, Jena University Hospital, Jena, Germany
| | - Julia Leonhardt
- Department of Anesthesiology and Intensive Care Medicine, Jena University Hospital, Jena, Germany
| | - Michael Bauer
- Department of Anesthesiology and Intensive Care Medicine, Jena University Hospital, Jena, Germany
| | - Christoph Sponholz
- Department of Anesthesiology and Intensive Care Medicine, Jena University Hospital, Jena, Germany
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6
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Patel P, Okoronkwo N, Pyrsopoulos NT. Future Approaches and Therapeutic Modalities for Acute Liver Failure. Clin Liver Dis 2018; 22:419-427. [PMID: 29605076 DOI: 10.1016/j.cld.2018.01.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The current gold standard for the management of acute liver failure is liver transplantation. However, because of organ shortages, other modalities of therapy are necessary as a possible bridge. This article discusses the current modalities as well as the future management of acute liver failure. Liver assist devices, hepatocyte transplantation, stem cell transplant, organogenesis, and repopulation of decellularized organs are discussed.
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Affiliation(s)
- Pavan Patel
- Division of Gastroenterology and Hepatology, Rutgers New Jersey Medical School, 185 South Orange Avenue, MSB H-538, Newark, NJ 07103, USA
| | - Nneoma Okoronkwo
- Division of Gastroenterology and Hepatology, Rutgers New Jersey Medical School, 185 South Orange Avenue, MSB H-538, Newark, NJ 07103, USA
| | - Nikolaos T Pyrsopoulos
- Division of Gastroenterology and Hepatology, Rutgers New Jersey Medical School, 185 South Orange Avenue, MSB H-538, Newark, NJ 07103, USA.
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7
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Tuerdi B, Zuo L, Sun H, Wang K, Wang Z, Li G. Safety and efficacy of regional citrate anticoagulation in continuous blood purification treatment of patients with multiple organ dysfunction syndrome. Braz J Med Biol Res 2017; 51:e6378. [PMID: 29185591 PMCID: PMC5685057 DOI: 10.1590/1414-431x20176378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 06/23/2017] [Indexed: 12/26/2022] Open
Abstract
The aim of this study was to discuss the safety and efficacy of regional citrate anticoagulation (RCA) on continuous blood purification (CBP) during the treatment of multiple organ dysfunction syndrome (MODS). Thirty-five patients with MODS were divided into two groups: the local citrate anticoagulation (RCA) group, and the heparin-free blood purification (hfBP) group. The MODS severity was assessed according to Marshall's MODS score criteria. Blood coagulation indicators, blood pressure, filter lifespan, filter replacement frequency, anticoagulation indicators, and main metabolic and electrolyte indicators were analyzed and compared between RCA and hfBP groups. RCA resulted in lower blood pressure than hfBP. The filter efficacy in RCA treatment was longer than in the hfBP group. The blood clearance of creatine, blood urea nitrogen and uric acid was better in the RCA group. RCA also led to higher pH than hfBP. Neither treatment resulted in severe bleeding events. In addition, MODS score was positively correlated with prothrombin time and activated partial thromboplastin time but negatively correlated with platelet concentration. RCA is a safer and more effective method in CBP treatment; however, it could also lead to low blood pressure and blood alkalosis.
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Affiliation(s)
- B. Tuerdi
- Respiratory Intensive Care Units, the First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - L. Zuo
- Respiratory Intensive Care Units, the First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - H. Sun
- Respiratory Intensive Care Units, the First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - K. Wang
- Respiratory Intensive Care Units, the First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Z. Wang
- Intensive Care Units, Branch of the First Affiliated Hospital of Xinjiang Medical University, Changji, Xinjiang, China
| | - G. Li
- Intensive Care Units, Branch of the First Affiliated Hospital of Xinjiang Medical University, Changji, Xinjiang, China
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8
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Karvellas CJ, Subramanian RM. Current Evidence for Extracorporeal Liver Support Systems in Acute Liver Failure and Acute-on-Chronic Liver Failure. Crit Care Clin 2017; 32:439-51. [PMID: 27339682 DOI: 10.1016/j.ccc.2016.03.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Artificial (nonbiological) extracorporeal liver support devices aim to remove albumin-bound and water-soluble toxins to restore and preserve hepatic function and mitigate or limit the progression of multiorgan failure while hepatic recovery or liver transplant occurs. The following beneficial effects have been documented: improvement of jaundice, amelioration of hemodynamic instability, reduction of portal hypertension, and improvement of hepatic encephalopathy. The only randomized prospective multicenter controlled trial to show an improvement in transplant-free survival was for high-volume plasmapheresis. Biological (cell-based) extracorporeal liver support systems aim to support the failing liver through detoxification and synthetic function and warrant further study for safety and benefit.
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Affiliation(s)
- Constantine J Karvellas
- Division of Hepatology, University of Alberta, Edmonton, Alberta, Canada; Division of Critical Care Medicine, University of Alberta, 1-40 Zeidler Ledcor Building, Edmonton, Alberta T6G-2X8, Canada.
| | - Ram M Subramanian
- Division of Hepatology, Emory University, Atlanta, GA, USA; Division of Critical Care Medicine, Emory University, Atlanta, GA, USA
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9
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Dyla A, Mielnicki W, Bartczak J, Zawada T, Garba P. Effectiveness and Safety Assessment of Citrate Anticoagulation During Albumin Dialysis in Comparison to Other Methods of Anticoagulation. Artif Organs 2017; 41:818-826. [PMID: 28337775 DOI: 10.1111/aor.12876] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 07/26/2016] [Accepted: 08/31/2016] [Indexed: 12/14/2022]
Abstract
Liver failure is a serious and often deadly disease often requiring MARS (Molecular Adsorbent Recirculating System) therapy. Choosing the safe and effective method of anticoagulation during artificial liver support systems seems to be very difficult and extremely important. The aim of this study was to assess effectiveness and safety of regional anticoagulation with citrate in liver failure patients during MARS. We used a single center observational study. We analyzed 158 MARS sessions performed in 65 patients: 105 (66.5%) sessions in 41 patients with heparin anticoagulation, 40 (25.3%) sessions in 19 patients with citrate, and 13 (8%) sessions in only five patients without anticoagulation, that were excluded from part of the analysis. To determine the effectiveness of regional anticoagulation with citrate, probability of filter survival and changes in laboratory parameters were analyzed according to the applied method of anticoagulation. The safety of citrate was determined by Ca/Ca2+ ratio, acid-base balance, bleeding complications, and the need for blood product transfusions. The probability of filter survival in the citrate group was 94% and in the heparin group 82% (P = 0.204). There was no relationship between the method of anticoagulation and effectiveness of MARS therapy in lowering the levels of the analyzed parameters. Only one patient had a Ca/Ca2+ ratio higher than he safety margin. There were no statistically significant changes in pH and lactate level irrespective of anticoagulation; bicarbonate dropped significantly only in the heparin group (P = 0.03). The frequency of bleeding complications and the need for transfusions did not differ significantly between groups. Regional anticoagulation with citrate can be an effective and safe method of anticoagulation during MARS therapy, but requires attentive monitoring and further studies in liver failure patients.
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Affiliation(s)
- Agnieszka Dyla
- Anesthesiology 4th Military Clinical Hospital, Wroclaw, Poland
| | | | - Joanna Bartczak
- Anesthesiology 4th Military Clinical Hospital, Wroclaw, Poland
| | - Tomasz Zawada
- Anesthesiology 4th Military Clinical Hospital, Wroclaw, Poland
| | - Piotr Garba
- Anesthesiology 4th Military Clinical Hospital, Wroclaw, Poland
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10
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Solomon C, Ranucci M, Hochleitner G, Schöchl H, Schlimp CJ. Assessing the Methodology for Calculating Platelet Contribution to Clot Strength (Platelet Component) in Thromboelastometry and Thrombelastography. Anesth Analg 2015; 121:868-878. [PMID: 26378699 PMCID: PMC4568902 DOI: 10.1213/ane.0000000000000859] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2015] [Indexed: 12/28/2022]
Abstract
The viscoelastic properties of blood clot have been studied most commonly using thrombelastography (TEG) and thromboelastometry (ROTEM). ROTEM-based bleeding treatment algorithms recommend administering platelets to patients with low EXTEM clot strength (e.g., clot amplitude at 10 minutes [A10] <40 mm) once clot strength of the ROTEM® fibrin-based test (FIBTEM) is corrected. Algorithms based on TEG typically use a low value of maximum amplitude (e.g., <50 mm) as a trigger for administering platelets. However, this parameter reflects the contributions of various blood components to the clot, including platelets and fibrin/fibrinogen. The platelet component of clot strength may provide a more sensitive indication of platelet deficiency than clot amplitude from a whole blood TEG or ROTEM® assay. The platelet component of the formed clot is derived from the results of TEG/ROTEM® tests performed with and without platelet inhibition. In this article, we review the basis for why this calculation should be based on clot elasticity (e.g., the E parameter with TEG and the CE parameter with ROTEM®) as opposed to clot amplitude (e.g., the A parameter with TEG or ROTEM®). This is because clot elasticity, unlike clot amplitude, reflects the force with which the blood clot resists rotation within the device, and the relationship between clot amplitude (variable X) and clot elasticity (variable Y) is nonlinear. A specific increment of X (ΔX) will be associated with different increments of Y (ΔY), depending on the initial value of X. When calculated correctly, using clot elasticity data, the platelet component of the clot can provide a valuable insight into platelet deficiency in emergency bleeding.
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Affiliation(s)
- Cristina Solomon
- From the CSL Behring, Marburg, Germany; Department of Anesthesiology, Perioperative Care and General Intensive Care, Paracelsus Medical University, Salzburg University Hospital, Salzburg, Austria; Ludwig Boltzmann Institute for Experimental and Clinical Traumatology and AUVA Research Centre, Vienna, Austria; Department of Cardiothoracic and Vascular Anesthesia and Intensive Care, IRCCS Policlinico, San Donato, Milan, Italy; CSL Behring, Vienna, Austria and Department of Anesthesiology and Intensive Care, AUVA Trauma Hospital of Salzburg, Austria
| | - Marco Ranucci
- From the CSL Behring, Marburg, Germany; Department of Anesthesiology, Perioperative Care and General Intensive Care, Paracelsus Medical University, Salzburg University Hospital, Salzburg, Austria; Ludwig Boltzmann Institute for Experimental and Clinical Traumatology and AUVA Research Centre, Vienna, Austria; Department of Cardiothoracic and Vascular Anesthesia and Intensive Care, IRCCS Policlinico, San Donato, Milan, Italy; CSL Behring, Vienna, Austria and Department of Anesthesiology and Intensive Care, AUVA Trauma Hospital of Salzburg, Austria
| | - Gerald Hochleitner
- From the CSL Behring, Marburg, Germany; Department of Anesthesiology, Perioperative Care and General Intensive Care, Paracelsus Medical University, Salzburg University Hospital, Salzburg, Austria; Ludwig Boltzmann Institute for Experimental and Clinical Traumatology and AUVA Research Centre, Vienna, Austria; Department of Cardiothoracic and Vascular Anesthesia and Intensive Care, IRCCS Policlinico, San Donato, Milan, Italy; CSL Behring, Vienna, Austria and Department of Anesthesiology and Intensive Care, AUVA Trauma Hospital of Salzburg, Austria
| | - Herbert Schöchl
- From the CSL Behring, Marburg, Germany; Department of Anesthesiology, Perioperative Care and General Intensive Care, Paracelsus Medical University, Salzburg University Hospital, Salzburg, Austria; Ludwig Boltzmann Institute for Experimental and Clinical Traumatology and AUVA Research Centre, Vienna, Austria; Department of Cardiothoracic and Vascular Anesthesia and Intensive Care, IRCCS Policlinico, San Donato, Milan, Italy; CSL Behring, Vienna, Austria and Department of Anesthesiology and Intensive Care, AUVA Trauma Hospital of Salzburg, Austria
| | - Christoph J. Schlimp
- From the CSL Behring, Marburg, Germany; Department of Anesthesiology, Perioperative Care and General Intensive Care, Paracelsus Medical University, Salzburg University Hospital, Salzburg, Austria; Ludwig Boltzmann Institute for Experimental and Clinical Traumatology and AUVA Research Centre, Vienna, Austria; Department of Cardiothoracic and Vascular Anesthesia and Intensive Care, IRCCS Policlinico, San Donato, Milan, Italy; CSL Behring, Vienna, Austria and Department of Anesthesiology and Intensive Care, AUVA Trauma Hospital of Salzburg, Austria
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11
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Lebherz-Eichinger D, Schwarzer R, Motal MC, Klaus DA, Mangold A, Ankersmit HJ, Berlakovich GA, Krenn CG, Roth GA. Liver transplantation reverses hypergammaglobulinemia in patients with chronic hepatic failure. Biochem Med (Zagreb) 2015; 25:252-61. [PMID: 26110038 PMCID: PMC4470094 DOI: 10.11613/bm.2015.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 05/14/2015] [Indexed: 01/03/2023] Open
Abstract
Introduction Sparse data are available about the effect of therapy methods on antibody levels in patients with liver failure. The aim of this study was to determine serum immunoglobulin concentrations in patients with chronic hepatic failure (CHF), acute- (ALF), or acute-on-chronic liver failure (ACLF) and to evaluate the impact of MARS treatment or liver transplantation (LT) on antibody levels. Materials and methods We followed ten patients with ALF, twelve with ACLF and 18 with CHF. Eight patients with ALF and seven with ACLF underwent MARS therapy, whereas the rest received LT. 13 healthy volunteers served as controls. Serum antibody concentrations were measured using ELISA-technique. Results Median serum levels of IgA, IgG and IgM were significantly increased in patients with CHF compared to ALF or controls (P < 0.02, P < 0.01, and P < 0.01). IgM and IgG concentrations were also significantly elevated in patients with CHF compared to ACLF (IgM, 3.7 vs. 1 g/L, P < 0.001; IgG, 8.7 vs. 3.1 g/L, P = 0.004). Immediately after LT a significant decrease of IgA (6.9 vs. 3.1 g/L, P = 0.004), IgG (8.7 vs. 5.1 g/L, P = 0.02) and IgM (3.7 vs. 1.8 g/L, P = 0.001) was detected in patients with CHF and antibody levels further decreased the days after LT reaching levels comparable to healthy individuals. MARS treatment had no apparent effect on the immunoglobulin profile in patients with ALF or ACLF. Conclusion We provide evidence that LT reverses hypergammaglobulinemia in patients suffering from CHF within one day, which could be explained to a reconstituted hepatic antibody clearance, whereas MARS treatment has no immediate effect on immunoglobulin levels.
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Affiliation(s)
- Diana Lebherz-Eichinger
- Department of Anesthesiology, General Intensive Care and Pain Medicine, Medical University of Vienna, Vienna, Austria ; Christian Doppler Laboratory for Cardiac and Thoracic Diagnosis and Regeneration, Medical University of Vienna, Vienna, Austria ; RAIC Laboratory 13C1, Medical University of Vienna, Vienna, Austria
| | - Remy Schwarzer
- Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Michael C Motal
- Department of Anesthesiology, General Intensive Care and Pain Medicine, Medical University of Vienna, Vienna, Austria ; RAIC Laboratory 13C1, Medical University of Vienna, Vienna, Austria
| | - Daniel A Klaus
- Department of Anesthesiology, General Intensive Care and Pain Medicine, Medical University of Vienna, Vienna, Austria ; RAIC Laboratory 13C1, Medical University of Vienna, Vienna, Austria
| | - Andreas Mangold
- Christian Doppler Laboratory for Cardiac and Thoracic Diagnosis and Regeneration, Medical University of Vienna, Vienna, Austria
| | - Hendrik J Ankersmit
- Christian Doppler Laboratory for Cardiac and Thoracic Diagnosis and Regeneration, Medical University of Vienna, Vienna, Austria ; Department of Thoracic Surgery, Medical University of Vienna, Vienna, Austria
| | | | - Claus G Krenn
- Department of Anesthesiology, General Intensive Care and Pain Medicine, Medical University of Vienna, Vienna, Austria ; RAIC Laboratory 13C1, Medical University of Vienna, Vienna, Austria
| | - Georg A Roth
- Department of Anesthesiology, General Intensive Care and Pain Medicine, Medical University of Vienna, Vienna, Austria ; RAIC Laboratory 13C1, Medical University of Vienna, Vienna, Austria
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12
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Klammt S, Mitzner SR, Reisinger EC, Stange J. No sustained impact of intermittent extracorporeal liver support on thrombocyte time course in a randomized controlled albumin dialysis trial. Ther Apher Dial 2014; 18:502-8. [PMID: 25195684 DOI: 10.1111/1744-9987.12124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reduction of platelets is a common finding in patients with liver disease and can be aggravated by extracorporeal therapies, e.g. artificial liver support. The impact of extracorporeal albumin dialysis on the time count and time course of platelets in liver failure patients was evaluated in a randomized controlled clinical trial. Mean thrombocyte reduction during a single extracorporeal liver support therapy was -15.1% [95%CI: -17.7; -12.5]. No differences were found between treatments of patients with a more reduced platelet count (<100 GPT/L: -15.6% [-19.5; -11.7%]; n = 43) compared to patients with normal or slightly decreased thrombocytes (-14.6% [-18.3%; -11.0%]; n = 43; P = 0.719). The variation of platelet count within 24 h after onset of extracorporeal therapy treatment was less, albeit significant (-3.5% [-6.3%; -0.7%], P < 0.016). Absolute thrombocyte variability was comparable between both groups (with extracorporeal therapy -5.6 GPT/L [-9.7; -1.4], without extracorporeal therapy -1.3 GPT/L [-7.3; 4.7]; P = 0.243), whereas relative decrease of thrombocytes within a 24-h period of extracorporeal therapy was greater than the changes in patients without extracorporeal therapy (-3.5% [-6.3%; -0.7%] vs. 2.0% [-2.0%; 5.9%]; P = 0.026]. Within a period of two weeks after enrollment, no significant differences of platelet count were observed either between the two groups or in the time course (P(group) = 0.337, P(time) = 0.277). Reduction of platelets during intermittent extracorporeal liver support was less pronounced within a 24-h period as before and after a single treatment and was comparable to variations in the control group without extracorporeal therapy.
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Affiliation(s)
- Sebastian Klammt
- Division of Nephrology, University Rostock, Rostock, Germany; Division of Tropical Medicine and Infectious Diseases, Department of Internal Medicine II, University Rostock, Rostock, Germany
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13
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Müller MC, Meijers JCM, Vroom MB, Juffermans NP. Utility of thromboelastography and/or thromboelastometry in adults with sepsis: a systematic review. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2014; 18:R30. [PMID: 24512650 PMCID: PMC4056353 DOI: 10.1186/cc13721] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 01/29/2014] [Indexed: 12/12/2022]
Abstract
Introduction Coagulation abnormalities are frequent in sepsis. Conventional coagulation assays, however, have several limitations. A surge of interest exists in the use of point-of-care tests to diagnose hypo- and hypercoagulability in sepsis. We performed a systematic review of available literature to establish the value of rotational thromboelastography (TEG) and thromboelastometry (ROTEM) compared with standard coagulation tests to detect hyper- or hypocoagulability in sepsis patients. Furthermore, we assessed the value of TEG/ROTEM to identify sepsis patients likely to benefit from therapies that interfere with the coagulation system. Methods MEDLINE, EMBASE, and the Cochrane Library were searched from 1 January 1980 to 31 December 2012. The search was limited to adults, and language was limited to English. Reference lists of retrieved articles were hand-searched for additional studies. Ongoing trials were searched on http://www.controlled-trials.com and http://www.clinicaltrials.gov. Studies addressing TEG/ROTEM measurements in adult patients with sepsis admitted to the ICU were considered eligible. Results Of 680 screened articles, 18 studies were included, of which two were randomized controlled trials, and 16 were observational cohort studies. In patients with sepsis, results show both hyper- and hypocoagulability, as well as TEG/ROTEM values that fell within reference values. Both hyper- and hypocoagulability were to some extent associated with diffuse intravascular coagulation. Compared with conventional coagulation tests, TEG/ROTEM can detect impaired fibrinolysis, which can possibly help to discriminate between sepsis and systemic inflammatory response syndrome (SIRS). A hypocoagulable profile is associated with increased mortality. The value of TEG/ROTEM to identify patients with sepsis who could possibly benefit from therapies interfering with the coagulation system could not be assessed, because studies addressing this topic were limited. Conclusion TEG/ROTEM could be a promising tool in diagnosing alterations in coagulation in sepsis. Further research on the value of TEG/ROTEM in these patients is warranted. Given that coagulopathy is a dynamic process, sequential measurements are needed to understand the coagulation patterns in sepsis, as can be detected by TEG/ROTEM.
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14
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Abstract
PURPOSE OF REVIEW The mortality in patients suffering from liver failure decreased in line with medical progress over the past decades. However, it still remains unacceptably high and liver transplantation still provides the only definite treatment for many patients. The goal of extracorporeal liver support systems is to improve the clinical condition of patients waiting for liver transplantation and/or enhance the regeneration of native injured liver. Nonbiological liver support systems with pure detoxification and biological liver support systems with assumed synthesis and metabolism in addition to detoxification are currently under clinical investigation. Since patient survival is the most significant outcome parameter, we focus in this review on prospective randomized trials with survival rate as primary outcome parameter. RECENT FINDINGS Although a short-term outcome benefit in patients with acute-on-chronic liver failure was shown in some of these trials, long-term outcome has not been improved significantly with either of the support systems. In spite of more favourable but yet limited data in patients with acute liver failure, it is too early to draw definite conclusions. SUMMARY The future development of liver support systems may provide different combinations of new adsorbents, integrated regional citrate anticoagulation and eventual substitution of irreversibly damaged albumin.
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15
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Schaefer B, Schmitt CP. The role of molecular adsorbent recirculating system dialysis for extracorporeal liver support in children. Pediatr Nephrol 2013. [PMID: 23179193 DOI: 10.1007/s00467-012-2348-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The majority of children with acute, acute-on-chronic, and progressive chronic liver failure require liver transplantation. Since organ availability is limited, extracorporeal liver support systems are increasingly applied to bridge the time until transplantation. At present, four different devices are available: the molecular adsorbent recirculating system (MARS), Prometheus dialysis, plasma exchange combined with hemodialysis (PE/HD), and single-pass albumin dialysis (SPAD). Randomized trials in adults have demonstrated efficient toxin removal, improved portal hypertension, hemodynamic stability, and improved hepatic encephalopathy compared with standard medical therapy. None of the liver support systems has yet been evaluated systematically in children. Knowledge of the specific indications and technical features of the different devices is essential if applied in children. MARS combines albumin dialysis with conventional hemodialysis and allows for efficient removal of water and protein-bound toxins without exogenous protein delivery and the associated infectious and allergic risks. It has successfully been applied in children with otherwise intractable cholestatic pruritus and with liver failure. The benefits, however, need to be balanced against the costs and the risk of volume and nitrogen overload if repeated plasma infusion is required. In cases of active bleeding, plasma exchange in combination with hemodialysis should be preferred.
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Affiliation(s)
- Betti Schaefer
- Division of Pediatric Nephrology, Center for Pediatric and Adolescent Medicine, Im Neuenheimer Feld 430, 69120, Heidelberg, Germany
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16
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Roth GA, Nickl S, Lebherz-Eichinger D, Schmidt EM, Ankersmit HJ, Faybik P, Hetz H, Krenn CG. Lipocalin-2 serum levels are increased in acute hepatic failure. Transplant Proc 2013; 45:241-4. [PMID: 23375308 DOI: 10.1016/j.transproceed.2012.02.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Revised: 01/04/2012] [Accepted: 02/14/2012] [Indexed: 01/31/2023]
Abstract
Lipocalin-2 (LCN-2), which is expressed in immunocytes as well as hepatocytes, is upregulated in cells under stress from infection or inflammation with increase in serum levels. We sought to investigate the relevance of LCN-2 in the setting of acute hepatic failure, particularly when addressed with the molecular adsorbent recirculating system (MARS). We measured serum LCN-2 concentrations with enzyme-linked immunosorbent assay (ELISA) in 8 patients with acute-on-chronic-liver failure (ACLF) and acute liver failure (ALF) who were treated with MARS. The controls were 14 patients with stable chronic hepatic failure (CHF). LCN-2 was determined immediately before and after the first MARS session. Baseline LCN-2 serum concentrations were significantly increased among ACLF and ALF patients as compared with CHF (P = .004 and P = .0086, respectively). There was no significant difference between the ALF and ACLF group. Moreover, serum LCN-2 levels did not change significantly during the MARS treatment. Serum LCN-2 levels, therefore, may be useful to discern acute from chronic hepatic failure and to monitor the course as well as the severity of the disease.
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Affiliation(s)
- G A Roth
- Department of Anesthesiology, General Intensive Care and Pain Medicine, Medical University of Vienna, Vienna, Austria.
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Donati G, La Manna G, Cianciolo G, Grandinetti V, Carretta E, Cappuccilli M, Panicali L, Iorio M, Piscaglia F, Bolondi L, Colì L, Stefoni S. Extracorporeal detoxification for hepatic failure using molecular adsorbent recirculating system: depurative efficiency and clinical results in a long-term follow-up. Artif Organs 2013; 38:125-34. [PMID: 23834711 DOI: 10.1111/aor.12106] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Acute liver failure and acute-on-chronic liver failure still show a poor prognosis. The molecular adsorbent recirculating system (MARS) has been extensively used as the most promising detoxifying therapy for patients with these conditions. Sixty-four patients with life-threatening liver failure were selected, and 269 MARS treatments were carried out as a bridge for orthotopic liver transplantation (OLT) or for liver function recovery. All patients were grouped according to the aim of MARS therapy. Group A consisted of 47 patients treated for liver function recovery (median age 59 years, range 23-82). Group B consisted of 11 patients on the waiting list who underwent OLT (median age 47 years, range 32-62). Group C consisted of 6 patients on the waiting list who did not undergo OLT (median age 45.5 years, range 36-54, P = 0.001). MARS depurative efficiency in terms of liver toxins, cytokines, and growth factors was assessed together with the clinical outcome of the patients during a 1-year follow-up. Total bilirubin reduction rate per session (RRs) for each MARS session was 23% (range 17-29); direct bilirubin RRs was 28% (21-35), and indirect bilirubin RRs was 8% (3-21). Ammonia RRs was 34% (12-86). Conjugated cholic acid RRs was 58% (48-61); chenodeoxycholic acid RRs was 34% (18-48). No differences were found between groups. Hepatocyte growth factor (HGF) values on starting MARS were 4.1 ng/mL (1.9-7.9) versus 7.9 ng/mL (3.2-14.1) at MARS end (P < 0.01). Cox regression analysis to determine the risk factors predicting patient outcomes showed that age, male gender, and Sequential Organ Failure Assessment score (but not Model for End-stage Liver Disease score) were factors predicting death, whereas the number of MARS sessions and the ΔHGF proved protective factors. Kaplan-Meier survival analysis was also used; after 12 months, 21.3% of patients in Group A survived, while 90.9% were alive in Group B and 16.7% in Group C (log rank = 0.002). In conclusion, MARS was clinically well tolerated by all patients and significantly reduced hepatic toxins. Better survival rates were linked to an OLT program, but patients' clinical characteristics on starting MARS therapy were the main factors predicting survival. The role of HGF should be evaluated in larger clinical trials.
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Affiliation(s)
- Gabriele Donati
- Department of Nephrology, Dialysis and Renal Transplantation Unit, S. Orsola Hospital, University of Bologna, Bologna, Italy
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Schaefer B, Schaefer F, Wittmer D, Engelmann G, Wenning D, Schmitt CP. Molecular Adsorbents Recirculating System dialysis in children with cholestatic pruritus. Pediatr Nephrol 2012; 27:829-34. [PMID: 22083365 DOI: 10.1007/s00467-011-2058-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Revised: 08/28/2011] [Accepted: 08/30/2011] [Indexed: 12/21/2022]
Abstract
BACKGROUND Cholestatic pruritus may severely compromise quality of life. The Molecular Adsorbents Recirculating System (MARS) allows removal of pruritogenic substances without exposure to foreign proteins. Pediatric data, however, are scant. METHODS We retrospectively analyzed the efficacy of MARS in three boys with severe cholestatic pruritus. They received a total of 135 MARS sessions during 8, 4, and 13 months prior to liver transplantation. Total serum bilirubin and bile acids were monitored, and pruritus was assessed by a numerical rating scale (NRS 0 = no pruritus, 10 = maximal pruritus). RESULTS MARS sessions were initially performed three times weekly at a mean duration of 6.3 ± 1.4 h. Sessions could be reduced to once weekly and once every other week in two patients. Pre-MARS plasma bile acid concentrations averaged 207 ± 67 μmol/l. They declined to 67 ± 9%, 48 ± 3%, 38 ± 14%, and 37 ± 5% of baseline within 2, 4, 6 and 8 h of therapy, respectively (all p < 0.05). The average interdialytic increase of plasma bile acids was 34 ± 33 μmol/l per day. Mean NRS score decreased from 6.5 ± 2.3 to 3.3 ± 2.9 (p < 0.01). Skin lesions from itching disappeared. All MARS treatments were well tolerated. CONCLUSION MARS dialysis substantially reduces cholestatic pruritus in children refractory to pharmacological treatment.
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Affiliation(s)
- Betti Schaefer
- Center for Pediatric and Adolescent Medicine Heidelberg, University of Heidelberg, INF 430, 69120 Heidelberg, Germany
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Meijers B, Laleman W, Vermeersch P, Nevens F, Wilmer A, Evenepoel P. A prospective randomized open-label crossover trial of regional citrate anticoagulation vs. anticoagulation free liver dialysis by the Molecular Adsorbents Recirculating System. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2012; 16:R20. [PMID: 22305273 PMCID: PMC3396260 DOI: 10.1186/cc11180] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Revised: 12/08/2011] [Accepted: 02/03/2012] [Indexed: 02/07/2023]
Abstract
Introduction The Molecular Adsorbent Recycling System (MARS) is used to treat patients with liver failure. Observational data suggest that citrate anticoagulation during MARS is feasible. Comparative studies on the optimal anticoagulation regimen during MARS are lacking. The aim of the current study was to evaluate two heparin-free anticoagulation regimens. Methods We performed a prospective randomized open-label crossover study of regional citrate anticoagulation against no anticoagulation. Ten patients (age 55 ± 11 years) with liver failure undergoing MARS treatment were included. The primary endpoint was completion of MARS sessions. Secondary endpoints included treatment efficacy and safety. Longevity of MARS treatment was plotted as a Kaplan-Meier estimate. Fisher's exact test was used for contingency table analysis. Results Of a total of 27 6-hour sessions, four sessions had to be terminated prematurely, three due to occlusive clotting of the extracorporeal circuit and one due to uncontrollable bleeding from the vascular access site. All four events occurred in the group without anticoagulation. Between group comparison demonstrated citrate anticoagulation to significantly increase the likelihood of completed MARS treatment (Fisher's exact test, P 0.04). This translates into higher bilirubin reduction ratios when citrate was applied (reduction ratio 0.25 vs. 0.15, P 0.02). Systemic ionized calcium concentrations were significantly reduced during citrate anticoagulation (P < 0.001) but remained within a safe range. We observed no major adverse events. Conclusions Regional citrate anticoagulation in patients with liver failure is feasible. Citrate anticoagulation provides superior patency of the extracorporeal circuit. Avoidance of anticoagulation during MARS results in significant loss of treatment efficacy, due to treatment downtime. Additional studies are required to identify the optimal anticoagulation regimen for extracorporeal circulation in patients with liver failure.
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Affiliation(s)
- Björn Meijers
- Department of Internal Medicine, Nephrology, University Hospitals Leuven, Herestraat 49, Leuven, B-3000, Belgium.
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Schaden E, Hoerburger D, Hacker S, Kraincuk P, Baron DM, Kozek-Langenecker S. Fibrinogen function after severe burn injury. Burns 2011; 38:77-82. [PMID: 22113102 DOI: 10.1016/j.burns.2010.12.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 11/14/2010] [Accepted: 12/05/2010] [Indexed: 01/07/2023]
Abstract
BACKGROUND Evidence regarding hypercoagulability in the first week after burn trauma is growing. This hypercoagulable state may partly be caused by increased fibrinogen levels. Rotational thrombelastometry offers a test which measures functional fibrinogen (FIBTEM(®)). To test the hypothesis that in patients with severe burn injury fibrinogen function changes over time, we simultaneously measured FIBTEM(®) and fibrinogen concentration early after burn trauma. METHODS After Ethics Committee approval consecutive patients with severe burn trauma admitted to the burn intensive care unit of the General Hospital of Vienna were included in the study. Blood examinations were done immediately and 12, 24 and 48 h after admission. At each time point fibrinogen level (Clauss) and 4 commercially available ROTEM(®) tests were performed. RESULTS 20 consecutive patients were included in the study. Fibrinogen level and FIBTEM(®) MCF were within the reference range until 24 h after burn trauma but increased significantly 48 h after trauma. There was a significant correlation between FIBTEM(®) MCF and fibrinogen level (R=0.714, p<0.001). CONCLUSION The results of this prospective observational clinical study show that fibrinogen function changes early after burn trauma and can be visualized by ROTEM(®) with the fibrinogen-sensitive FIBTEM(®) test.
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Affiliation(s)
- Eva Schaden
- Dept. of Anesthesiology, General Intensive Care and Pain Control, Medical University Of Vienna, Austria.
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Cadena FA, Serna LFC, Quintero C. IF, Caicedo LA, Perdomo CAV, González LF. Sistemas de soporte hepático extracorpóreo. COLOMBIAN JOURNAL OF ANESTHESIOLOGY 2011. [DOI: 10.5554/rca.v39i4.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Schaefer B, Schaefer F, Engelmann G, Meyburg J, Heckert KH, Zorn M, Schmitt CP. Comparison of Molecular Adsorbents Recirculating System (MARS) dialysis with combined plasma exchange and haemodialysis in children with acute liver failure. Nephrol Dial Transplant 2011; 26:3633-9. [PMID: 21421589 DOI: 10.1093/ndt/gfr115] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Molecular Adsorbents Recirculating System (MARS) is an extracorporeal liver support system eliminating albumin-bound and water-soluble substances. While it is increasingly applied in patients with acute liver failure (ALF), no comparison with standard dialysis methods has yet been performed. METHODS This is an analysis of ten children (0.1-18 years) with ALF, who underwent a total of 22 MARS sessions. Standard adult MARS sets were used in seven (23.5-72 kg) and MARS Mini in three children (2.8-13 kg). In eight children, MARS was alternated with combined plasma exchange (PE) and haemodialysis (HD) treatments. Mean treatment duration was 7.2 (6-10) h for MARS and 5.7 (4.5-6.6) h for PE/HD. RESULTS Standard MARS treatment only slightly decreased serum bilirubin (16.3 ± 6.5-13.8 ± 5.9 mg/dL) and ammonia (113 ± 62-99 ± 68 μmol/L) and international normalized ratio (INR) tended to increase (1.5 ± 0.3 and 2 ± 1.1). Mini-MARS did not reduce serum bilirubin (19.7 ± 3-20.5 ± 3.2 mg/dL), ammonia slightly decreased (70 ± 24-56 ± 9 μmol/L) and INR increased (2.5 ± 0.7-2.9 ± 1.1, all P = n.s.). In contrast, PE/HD reduced serum bilirubin (23 ± 8.4-14.7 ± 7 mg/dL), ammonia (120 ± 60-70 ± 40 μmol/L) and INR (2.4 ± 0.8-1.4 ± 0.1, all P < 0.05). Intraindividual comparison showed a slight increase in bilirubin by 2 ± 22% with MARS and a reduction by 37 ± 11% with PE/HD (P < 0.001 versus MARS) and a decrease in ammonia of 18 ± 27 and 39 ± 23% (P < 0.05). INR increased during MARS by 26 ± 41% and decreased with PE/HD by 37 ± 20% (P < 0.01). All treatment sessions were well tolerated. Five children died, including the three children treated with Mini-MARS. CONCLUSION Our experience suggests superior efficacy of combined PE/HD as compared to intermittent MARS therapy for treating ALF.
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Affiliation(s)
- Betti Schaefer
- Department of General Pediatrics, Center for Pediatric and Adolescent Medicine, University of Heidelberg, Germany
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23
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Bachli EB, Bösiger J, Béchir M, Stover JF, Stocker R, Maggiorini M, Renner EL, Müllhaupt B, Schuepbach RA. Thromboelastography to monitor clotting/bleeding complications in patients treated with the molecular adsorbent recirculating system. Crit Care Res Pract 2011; 2011:313854. [PMID: 21527982 PMCID: PMC3064997 DOI: 10.1155/2011/313854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 01/13/2011] [Indexed: 11/17/2022] Open
Abstract
Background. The Molecular Adsorbent Recirculating System (MARS) has been shown to clear albumin-bound toxins from patients with liver failure but might cause bleeding complications potentially obscuring survival benefits. We hypothesized that monitoring clotting parameters and bed-side thromboelastography allows to reduce bleeding complications. Methods. Retrospective analysis of 25 MARS sessions during which clotting parameters were monitored by a standardized protocol. Results. During MARS therapy median INR increased significantly from 1.7 to 1.9 platelet count and fibrinogen content decreased significantly from 57 fL(-1) to 42 fL(-1) and 2.1 g/L to 1.5 g/L. Nine relevant complications occurred: the MARS system clotted 6 times 3 times we observed hemorrhages. Absent thrombocytopenia and elevated plasma fibrinogen predicted clotting of the MARS system (ROC 0.94 and 0.82). Fibrinolysis, detected by thromboelastography, uniquely predicted bleeding events. Conclusion. Bed-side thromboelastography and close monitoring of coagulation parameters can predict and, therefore, help prevent bleeding complications during MARS therapy.
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Affiliation(s)
- Esther B. Bachli
- Medical Intensive Care Unit, University Hospital Zurich, 8091 Zurich, Switzerland
- Clinic of Internal Medicine, Hospital Uster, 8610 Uster, Switzerland
| | - Jörg Bösiger
- Division of Haematology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Markus Béchir
- Surgical Intensive Care Unit, University Hospital Zurich, HOF-B-110, Raemistraße 100, 8091 Zurich, Switzerland
| | - John F. Stover
- Surgical Intensive Care Unit, University Hospital Zurich, HOF-B-110, Raemistraße 100, 8091 Zurich, Switzerland
| | - Reto Stocker
- Surgical Intensive Care Unit, University Hospital Zurich, HOF-B-110, Raemistraße 100, 8091 Zurich, Switzerland
| | - Marco Maggiorini
- Medical Intensive Care Unit, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Eberhard L. Renner
- Division of Gastroenterology and Hepatology, University Hospital Zurich, 8091 Zurich, Switzerland
- Multiorgan Transplant Program, University Health Network, University of Toronto, Toronto, Canada ON M5G 2N2
| | - Beat Müllhaupt
- Division of Gastroenterology and Hepatology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Reto A. Schuepbach
- Medical Intensive Care Unit, University Hospital Zurich, 8091 Zurich, Switzerland
- Surgical Intensive Care Unit, University Hospital Zurich, HOF-B-110, Raemistraße 100, 8091 Zurich, Switzerland
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Regional citrate anticoagulation in patients with liver failure supported by a molecular adsorbent recirculating system. Crit Care Med 2011; 39:273-9. [PMID: 20975551 DOI: 10.1097/ccm.0b013e3181fee8a4] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
OBJECTIVE Regional citrate anticoagulation has emerged as a promising method in critically ill patients at high risk of bleeding. However, in patients with liver failure, citrate accumulation may lead to acid-base and electrolyte imbalances, notably of calcium. The aim of this study was to evaluate the feasibility and safety of regional citrate anticoagulation during liver support using a molecular adsorbent recirculating system as well as its effects on electrolyte and acid-base balance in patients with liver failure. DESIGN Prospective observational study. SETTING University hospital. PATIENTS Twenty critically ill patients supported by molecular adsorbent recirculating system resulting from liver failure between January 2007 and May 2009. MEASUREMENTS AND MAIN RESULTS The median duration of molecular adsorbent recirculating system treatment was 20 hrs (interquartile range, 18-22 hrs). Two of 77 molecular adsorbent recirculating system treatments (2%) were prematurely discontinued as a result of filter clotting and bleeding, respectively. The median citrate infusion rate, necessary to maintain the postfilter ionized calcium between 0.2 and 0.4 mmol/L, was 3.1 mmol/L (interquartile range, 2.3-4 mmol/L) blood flow. The median calcium chloride substitution rate was 0.9 mmol/L (0.3-1.7 mmol/L) dialysate. Total serum calcium remained stable during molecular adsorbent recirculating system treatments. There was a statistically significant increase of the ratio of total calcium to systemic ionized calcium (2.04 ± 0.32 mmol/L to 2.17 ± 0.35; p = .01), which reflected citrate accumulation resulting from liver failure. Under close monitoring, no clinically relevant electrolytes or acid-base disorders were observed. CONCLUSIONS Our results suggest that regional citrate anticoagulation is a safe and feasible method to maintain adequate circuit lifespan without increasing the risk of hemorrhagic complications while maintaining a normal acid-base as well as electrolyte balance in patients with liver failure supported by molecular adsorbent recirculating system.
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Tan HK, Yang WS, Choong HL, Wong KS. Albumin dialysis without anticoagulation in high-risk patients: an observational study. Artif Organs 2010; 36:E83-8. [PMID: 21091517 DOI: 10.1111/j.1525-1594.2010.01065.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Severe liver failure causes coagulopathy and high bleeding risk. Albumin dialysis with Molecular Adsorbent Recirculating System (MARS) (Gambro, Lund, Sweden) is useful for treatment. However, anticoagulation during its use is of uncertain value. We omitted heparin-saline priming and intradialytic heparin and examined its effects. Albumin dialysis was performed in critically ill patients with intermittent circuit saline flushes (2664 ± 2420 mL per treatment). A total of 12 patients (M : F = 10:2; age 49 ± 9 years) were thus treated: 6 for fulminant hepatic failure and 6 for acute-on-chronic liver failure. The overall hospitalization duration was 31 ± 30 days. A total of 44 treatment sessions were performed (average 8 ± 7 sessions per patient). Prescribed versus achieved MARS duration were 13 ± 3 versus 11 ± 4 h, P < 0.05. Twenty-three percent (10/44) of MARS sessions clotted, 11% (5/44) of treatments were electively terminated, and 2% (1/44) developed vascular catheter occlusion. Spontaneous bleeding occurred in 9% (4/44). Pre- versus post-MARS systemic and blood circuit transmembrane pressures (mm Hg), and albumin dialysate afferent and efferent pressures were all stable. Coagulation indices were (pre- vs. post-MARS): (i) prothrombin time (seconds): 36 ± 30 versus 42 ± 33, P = 0.143; (ii) activated partial thromboplastin time (seconds): 78 ± 43 versus 88 ± 45, P = 0.117; and (iii) platelet count (×10(3) /µL): 87 ± 40 versus 76 ± 48, P = 0.004. Systemic blood solute concentrations pre- versus post-MARS were: (i) serum urea (mg/dL): 22.4 ± 19.6 versus 14.0 ± 8.4, P < 0.05; (ii) serum creatinine (mg/dL): 2.8 ± 2.3 versus 1.9 ± 1.5, P < 0.05; (iii) total bilirubin (mg/dL): 29.5 ± 8.8 versus 20.5 ± 5.1, P < 0.05; and (iv) plasma ammonia (µg/dL): 186 ± 85 versus 129 ± 66, P < 0.05. Anticoagulant-free albumin dialysis remained effective despite frequent circuit clotting. This led to significant exacerbation of thrombocytopenia although bleeding risk remained low.
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Affiliation(s)
- Han K Tan
- Department of Renal Medicine, Singapore General Hospital, Outram Road, Singapore
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Roth GA, Lubsczyk BA, Pilz J, Faybik P, Hetz H, Krenn CG. Nucleosome serum levels in acute hepatic failure and MARS treatment. Transplant Proc 2010; 41:4207-10. [PMID: 20005370 DOI: 10.1016/j.transproceed.2009.08.073] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2009] [Accepted: 08/17/2009] [Indexed: 11/18/2022]
Abstract
Serum nucleosomes have been suggested to be markers for cell death and apoptosis. Increased hepatocyte apoptosis can be demonstrated in acute liver failure (ALF) as well as acute-on-chronic liver failure (ACLF). We investigated the relevance of nucleosomes in the setting of acute hepatic failure. Further, we studied the effects of the molecular adsorbent recirculating system (MARS) on this marker of cell death. We measured serum nucleosome concentrations with ELISA in 12 patients with ACLF and 7 patients suffering from ALF, with 14 patients experiencing stable chronic hepatic failure (CHF) as controls. In a subset of 8 ACLF and ALF patients treated with MARS, nucleosomes were determined immediately before and after the first MARS session. Baseline nucleosome serum concentrations were significantly increased in ACLF and ALF patients as compared with CHF patients (P = .0161 and P = .0037, respectively). There was no significant difference between the ALF and ACLF groups. Moreover, serum nucleosome levels did not change significantly during MARS treatment in ALF and ACLF patients. Serum nucleosome levels therefore may be useful to discern acute from chronic hepatic failure or to monitor the course and the severity of the disease. Our results, however, warrant further larger clinical studies regarding the clearance of nucleosome in artificial liver-assist devices and to assess their role in acute hepatic failure.
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Affiliation(s)
- G A Roth
- Department of Anesthesiology, General Intensive Care and Pain Medicine, Medical University of Vienna, Waehringer Guertel 18-20, Vienna 1090, Austria.
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Camus C, Lavoué S, Gacouin A, Compagnon P, Boudjéma K, Jacquelinet C, Thomas R, Le Tulzo Y. Liver transplantation avoided in patients with fulminant hepatic failure who received albumin dialysis with the molecular adsorbent recirculating system while on the waiting list: impact of the duration of therapy. Ther Apher Dial 2010; 13:549-55. [PMID: 19954480 DOI: 10.1111/j.1744-9987.2009.00708.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Eighteen patients with fulminant hepatic failure due to various medical causes were listed for emergency liver transplantation and treated with extracorporeal albumin dialysis sessions using the molecular adsorbent recirculating system (MARS) at our center over a 74-month period. Due to improvement of liver function, transplantation could be avoided in 9 patients (50%, 95% confidence interval 29% to 71%) who fully recovered afterwards. This improvement rate was higher than the rate of improvement in the French cohort of fulminant hepatic failure patients with similar etiologies (19.3%, 95% confidence interval 14.9% to 24.6%, P = 0.002). In our 18 patients, there were no statistically significant differences in any baseline characteristics or in the time with liver failure meeting transplant criteria between the patients who improved while waiting and those who did not. However, the patients who improved received a greater number of sessions and a longer total duration of MARS therapy (all P < 0.001). In the whole study population, a MARS therapy duration > or =15 h was significantly associated with improvement of liver function without transplantation (adjusted adds ratio [OR] 65.76, 2.48-1743.11, P = 0.01). Tolerance of therapy was acceptable. These results suggest that MARS therapy could contribute to native liver recovery and is safe in patients on the waiting list for fulminant hepatic failure. A minimum duration of therapy (> or =15 h) could be necessary to expect significant liver function improvement.
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Affiliation(s)
- Christophe Camus
- Infectious Diseases and Intensive Care Medicine, Pontchaillou Hospital, Rennes, France.
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Krisper P, Tiran B, Fliser D, Haditsch B, Stadlbauer V, Otto R, Ernst T, Kretschmer U, Stauber RE, Haller H, Holzer H, Manns MP, Rifai K. Efficacy and Safety of Anticoagulation With Heparin Versus Heparin Plus Epoprostenol in Patients Undergoing Extracorporeal Liver Support With Prometheus. Artif Organs 2010; 34:84-8. [DOI: 10.1111/j.1525-1594.2009.00793.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Roth GA, Faybik P, Hetz H, Ankersmit HJ, Hoetzenecker K, Bacher A, Thalhammer T, Krenn CG. MCP-1 and MIP3-alpha serum levels in acute liver failure and molecular adsorbent recirculating system (MARS) treatment: a pilot study. Scand J Gastroenterol 2009; 44:745-51. [PMID: 19247846 DOI: 10.1080/00365520902770086] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE The CC chemokines monocyte chemoattractant protein-1 (MCP-1) and macrophage inflammatory protein-3 alpha (MIP3-alpha) may be involved in the pathogenesis of acute liver failure (ALF) and acute-on-chronic liver failure (ACLF). In ALF and ACLF, the molecular adsorbent recirculating system (MARS) has been used to support liver function. Enhancement of MCP-1, as seen in other extracorporeal support systems such as haemodialysis, might thus have mitigated the beneficial effects of the MARS system in acute hepatic failure. MATERIAL AND METHODS Serum concentrations of MCP-1 and MIP3-alpha were measured in 10 patients with ALF or ACLF treated with MARS. Thirteen patients suffering from chronic hepatic failure (CHF) and 15 healthy individuals served as controls. RESULTS Baseline MCP-1 serum concentrations were significantly increased in ALF and ACLF patients as compared to patients with CHF (p=0.0027 and p=0.0046, respectively) and controls (p=0.0006 and p=0.0012, respectively). MIP3-alpha serum concentrations were also significantly enhanced in the ALF and ACLF groups as compared with those in CHF patients (p=0.0002 and p=0.0003, respectively) and controls (p<0.0001 and p<0.0001, respectively). Moreover, MIP3-alpha levels were significantly increased in CHF patients as compared to controls (p=0.0002). MCP-1 and MIP3-alpha concentrations did not change significantly during MARS treatment in ALF and ACLF patients. CONCLUSIONS The CC chemokines MCP-1 and MIP3-alpha are increased in ALF and ACLF patients. MARS had no effect on MCP-1 and MIP3-alpha serum concentrations in patients with ALF and ACLF, and yielded no evidence of any harmful effects of the increase of these potentially hepatocidal chemokines.
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Affiliation(s)
- Georg A Roth
- Department of Anaesthesiology, General Intensive Care and Pain Medicine, Center for Physiology, Pathophysiology and Immunology, Medical University of Vienna, Vienna, Austria.
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Roth GA, Faybik P, Hetz H, Hacker S, Ankersmit HJ, Bacher A, Thalhammer T, Krenn CG. Pro-inflammatory interleukin-18 and Caspase-1 serum levels in liver failure are unaffected by MARS treatment. Dig Liver Dis 2009; 41:417-23. [PMID: 19019743 DOI: 10.1016/j.dld.2008.09.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2008] [Revised: 09/03/2008] [Accepted: 09/26/2008] [Indexed: 12/11/2022]
Abstract
BACKGROUND The pro-inflammatory cytokine IL-18 and its activator Caspase-1 are involved in acute liver failure and acute-on-chronic-liver-failure. In acute liver failure and acute-on-chronic-liver-failure, the MARS system has been used to support liver function. Enhancement of IL-18, as seen in other extracorporeal-support systems like hemodialysis might thus have mitigated beneficial effects of the MARS system in acute hepatic failure. PATIENTS AND METHODS We measured serum concentrations of IL-18 and Caspase-1 in 10 patients with acute liver failure and 10 patients suffering from acute-on-chronic-liver-failure, who were all treated with MARS. Thirteen patients suffering from chronic hepatic failure and 15 healthy individuals served as controls. Data are given as mean with 95% CI. RESULTS Baseline IL-18 serum concentrations were significantly increased in acute liver failure and acute-on-chronic-liver-failure patients as compared to chronic hepatic failure (P=0.0039 and P=0.0011, respectively) and controls (P=0.0028 and P=0.0014, respectively). Caspase-1 serum concentrations were as well significantly elevated in the acute liver failure and acute-on-chronic-liver-failure groups as compared to chronic hepatic failure patients (P=0.0039 and P=0.0232, respectively) and controls P<0.0001 and P<0.0007, respectively). IL-18 and Caspase-1 did not change significantly during MARS treatment in acute liver failure and acute-on-chronic-liver-failure patients. CONCLUSIONS MARS had no effect on IL-18 and Caspase-1 serum concentrations in acute liver failure and acute-on-chronic-liver-failure, providing no evidence of harmful effects by the increase of these potentially hepatocidal cytokines.
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Affiliation(s)
- G A Roth
- Department of Anesthesiology, General Intensive Care and Pain Medicine, Medical University of Vienna, Vienna, Austria.
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Argo CK, Balogun RA. Blood products, volume control, and renal support in the coagulopathy of liver disease. Clin Liver Dis 2009; 13:73-85. [PMID: 19150312 DOI: 10.1016/j.cld.2008.09.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Plasma-based products are commonly used in patients who have chronic liver disease to treat perceived coagulopathy despite unproven efficacy and potentially severe risks, such as transfusion-related acute lung injury, which carries a high mortality rate. Moreover, volume expansion may acutely worsen portal hypertension and increase bleeding from the collateral portal vascular bed. Although factor replacement therapy may be warranted in selected situations, its use should be restricted because of the limitations of target tests, such as international normalized ratio, which poorly reflects presence of bleeding diatheses in patients who have cirrhosis. Renal replacement therapies are frequent adjuncts in patients who have cirrhosis and are acutely decompensated, and may correct uremia-related bleeding diathesis and assist in controlling vascular volume, although they are generally limited to use as a bridge to liver transplantation. Novel extracorporeal therapies are emerging and may also have significant interaction with the hemostatic system. Volume contraction and blood conservation therapies are relatively new and promising approaches to reduce use of blood products in liver transplantation.
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Affiliation(s)
- Curtis K Argo
- University of Virginia, Department of Medicine, Division of Gastroenterology and Hepatology, Box 800708, Charlottesville, VA, USA.
| | - Rasheed A Balogun
- University of Virginia, Department of Medicine, Division of Nephrology, Charlottesville, VA, USA
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Yang WS, Tan HK, Lui HF, Chow PK, Choong HL, Wong KS. Albumin Dialysis in Critically Ill Patients: Use Versus Omission of Intradialytic Heparin. Artif Organs 2008; 32:411-6. [DOI: 10.1111/j.1525-1594.2008.00560.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Abstract
PURPOSE OF REVIEW Liver support devices are used either as a bridge to liver transplantation or liver recovery in patients with acute or acute-on-chronic liver failure. The review analyzes the recent literature and asks if the current enthusiasm for these devices is justified. RECENT FINDINGS Many liver support devices exist and are discussed. Clinical data on artificial devices are rapidly emerging, especially on the molecular adsorbents recirculating system, and fractionated plasma separation and adsorption (Prometheus). While hepatic encephalopathy is improved by the molecular adsorbents recirculating system and probably Prometheus too, neither system has been shown to improve survival. Less clinical data exist for bioartificial support devices. These may use human hepatocytes, such as the extracorporeal liver assist device, although most devices use porcine hepatocytes, such as HepatAssist. SUMMARY Enthusiasm in liver support devices is justified as many nonrandomized studies have suggested some biochemical and clinical benefits. The results of several ongoing multicenter randomized controlled trials are anxiously awaited. Meanwhile, because mortality without liver transplantation remains high despite the use of liver support devices, these devices should only be used in the research setting or by experts proficient in their use and as a bridge to liver transplantation rather than liver recovery.
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Affiliation(s)
- Jason Phua
- Division of Respiratory and Critical Care Medicine, Department of Medicine, National University Hospital, Singapore
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Karvellas CJ, Gibney N, Kutsogiannis D, Wendon J, Bain VG. Bench-to-bedside review: current evidence for extracorporeal albumin dialysis systems in liver failure. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2008; 11:215. [PMID: 17567927 PMCID: PMC2206413 DOI: 10.1186/cc5922] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Acute liver failure (ALF) and acute on chronic liver failure (AoCLF) carry a high mortality. The rationale for extracorporeal systems is to provide an environment facilitating recovery or a window of opportunity for liver transplantation. Recent technologies have used albumin as a scavenging molecule. Two different albumin dialysis systems have been developed using this principle: MARS (Molecular Adsorbent Recirculation System) and SPAD (Single-Pass Albumin Dialysis). A third system, Prometheus (Fractionated Plasma Separation and Adsorption), differs from the others in that the patient's albumin is separated across a membrane and then is run over adsorptive columns. Although several trials have been published (particularly with MARS), currently there is a lack of controlled studies with homogenous patient populations. Many studies have combined patients with ALF and AoCLF. Others have included patients with different etiologies. Although MARS and Prometheus have shown biochemical improvements in AoCLF and ALF, additional studies are required to show conclusive benefit in short- and long-term survival. The appropriate comparator is standard medical therapy rather than head-to-head comparisons of different forms of albumin dialysis.
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Affiliation(s)
- Constantine J Karvellas
- University of Alberta Liver Unit, Zeidler-Ledcor Building, 130 University Campus, Edmonton, Alberta, T6G 2X8 Canada
- Institute of Liver Studies, King's College Hospital, Denmark Hill, London, SE5 9RS, UK
| | - Noel Gibney
- Division of Critical Care Medicine, University of Alberta, 3C1 Walter C Mackenzie Health Sciences Centre, 8440-112 Street, Edmonton, Alberta T6G 2B7, Canada
| | - Demetrios Kutsogiannis
- Division of Critical Care Medicine, University of Alberta, 3C1 Walter C Mackenzie Health Sciences Centre, 8440-112 Street, Edmonton, Alberta T6G 2B7, Canada
| | - Julia Wendon
- Institute of Liver Studies, King's College Hospital, Denmark Hill, London, SE5 9RS, UK
| | - Vincent G Bain
- University of Alberta Liver Unit, Zeidler-Ledcor Building, 130 University Campus, Edmonton, Alberta, T6G 2X8 Canada
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Gonano C, Sitzwohl C, Meitner E, Weinstabl C, Kettner SC. Four-day antithrombin therapy does not seem to attenuate hypercoagulability in patients suffering from sepsis. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2007; 10:R160. [PMID: 17107615 PMCID: PMC1794466 DOI: 10.1186/cc5098] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/24/2006] [Revised: 10/21/2006] [Accepted: 11/15/2006] [Indexed: 12/20/2022]
Abstract
Introduction Sepsis activates the coagulation system and frequently causes hypercoagulability, which is not detected by routine coagulation tests. A reliable method to evaluate hypercoagulability is thromboelastography (TEG), but this has not so far been used to investigate sepsis-induced hypercoagulability. Antithrombin (AT) in plasma of septic patients is decreased, and administration of AT may therefore reduce the acquired hypercoagulability. Not clear, however, is to what extent supraphysiologic plasma levels of AT decrease the acute hypercoagulability in septic patients. The present study investigates the coagulation profile of septic patients before and during four day high-dose AT therapy. Methods Patients with severe sepsis were randomly assigned to receive either 6,000 IU AT as a bolus infusion followed by a maintenance dose of 250 IU/hour over four days (n = 17) or placebo (n = 16). TEG, platelet count, plasma fibrinogen levels, prothrombin time and activated partial thromboplastin time were assessed at baseline and daily during AT therapy. Results TEG showed a hypercoagulability in both groups at baseline, which was neither reversed by bolus or by maintenance doses of AT. The hypercoagulability was mainly caused by increased plasma fibrinogen, and to a lesser extent by platelets. Plasmatic coagulation as assessed by the prothrombin time and activated partial thromboplastin time was similar in both groups, and did not change during the study period. Conclusion The current study shows a distinct hypercoagulability in patients suffering from severe sepsis, which was not reversed by high-dose AT treatment over four days. This finding supports recent data showing that modulation of coagulatory activation in septic patients by AT does not occur before one week of therapy. Trial registration: Current Control Trials ISRCTN22931023
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Affiliation(s)
- Christopher Gonano
- Department of Anesthesiology and General Intensive Care, Medical University of Vienna, Waehringer Gürtel 18-20, A-1090 Vienna, Austria
- Austrian Anesthesiology and Critical Care Foundation, Vienna, Austria
| | - Christian Sitzwohl
- Department of Anesthesiology and General Intensive Care, Medical University of Vienna, Waehringer Gürtel 18-20, A-1090 Vienna, Austria
| | - Eva Meitner
- Department of Anesthesiology and General Intensive Care, Medical University of Vienna, Waehringer Gürtel 18-20, A-1090 Vienna, Austria
| | - Christian Weinstabl
- Department of Anesthesiology and General Intensive Care, Medical University of Vienna, Waehringer Gürtel 18-20, A-1090 Vienna, Austria
| | - Stephan C Kettner
- Department of Anesthesiology and General Intensive Care, Medical University of Vienna, Waehringer Gürtel 18-20, A-1090 Vienna, Austria
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Tan HK, Yang WS, Chow P, Lui HF, Choong HL, Wong KS. Anticoagulation Minimization Is Safe and Effective in Albumin Liver Dialysis Using the Molecular Adsorbent Recirculating System. Artif Organs 2007; 31:193-9. [PMID: 17343694 DOI: 10.1111/j.1525-1594.2007.00364.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The molecular adsorbent recirculating system (MARS) is a blood purification device with renal and hepatic dialytic effects. This study examined the use of low-dose unfractionated heparin in MARS. This was a prospective, observational study of 15 MARS treatment sessions (mean duration per treatment cycle = 12.2 +/- 4.5 h) in four patients with severe acute decompensation of chronic liver disease (n = 3) and fulminant hepatic failure (n = 1) treated with intermittent MARS. All patients were critically ill (APACHE II 24.8 +/- 3.3). Renal dialysis was with continuous hemofiltration and/or slow low-efficiency dialysis. One MARS session was terminated because of vascular access occlusion (1/15; 6.7%). Bleeding was noted in two sessions (2/15; 13%). Twelve MARS sessions were heparin-free and three treatments were with mean heparin dose of 833 +/- 382 IU. Serum biochemical parameters pre- and post-MARS were total bilirubin (micromol/L): 409.4 +/- 141.6 versus 282.9 +/- 90, P < 0.05; plasma ammonia (micromol/L): 44.3 +/- 21.2 versus 28.8 +/- 20.2, P = 0.002; urea (mmol/L): 15.9 +/- 11.8 versus 7.9 +/- 6.6, P = 0.002; creatinine (micromol/L): 252.4 +/- 151.9 versus 150.1 +/- 96.6, P = 0.003. Pre-MARS versus post-MARS systolic (SBPs) and diastolic (DBPs) blood pressures (mm Hg) were SBP = 129.2 +/- 27.7 versus 124 +/- 25, P = 0.838; and DBP = 60.7 +/- 15.3 versus 56 +/- 13, P = 0.595. Prothrombin time (PT), activated partial thromboplastin time (aPTT) and platelet count (Plt) pre- and post-MARS were PT(s): 22 +/- 7.9 versus 23.8 +/- 10.2, P = 0.116; aPTT (s): 64.5 +/- 40.9 versus 85.5 +/- 50.6, P = 0.092; and Plt (x10(3)/mm(3)): 87 +/- 67.6 versus 68.8 +/- 39, P = 0.098. MARS priming with heparin saline was safe. Heparin-minimized MARS did not compromise circuit function and longevity in extended intermittent MARS.
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Affiliation(s)
- Han Khim Tan
- Department of Renal Medicine, Singapore General Hospital, Outram Road, Singapore 169608.
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Westerholt A, Maier S, Traeger T, Gründling M, Heidecke CD. Management bei abdomineller Sepsis. Visc Med 2007. [DOI: 10.1159/000100519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Hetz H, Faybik P, Berlakovich G, Baker A, Bacher A, Burghuber C, Sandner SE, Steltzer H, Krenn CG. Molecular adsorbent recirculating system in patients with early allograft dysfunction after liver transplantation: a pilot study. Liver Transpl 2006; 12:1357-64. [PMID: 16741899 DOI: 10.1002/lt.20804] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Early allograft dysfunction (EAD) after orthotopic liver transplantation (OLT) causes marked morbidity and mortality. We conducted a prospective pilot study to assess the safety and efficacy of molecular adsorbent recirculating system (MARS) in treatment of EAD after OLT. Twelve consecutive adult liver allograft recipients with a median age of 48 years, 9 of whom were male, were prospectively included and supported with MARS. EAD was defined as the presence of at least 2 of the following: serum bilirubin >10 mg/dL, prothrombin time <40%, aspartate aminotransferase or alanine transferase >1,000 U/L, and plasma disappearance rate of indocyanine green (PDR(ICG)) <10% per minute within 72 hours after reperfusion. One-year patient and graft survival was 66%. There was a significant decrease in serum bilirubin (P = 0.002), serum creatinine (P = 0.006), and aspartate aminotransferase (P = 0.005) and a significant increase in PDR(ICG) (P = 0.007) after MARS treatment. Prothrombin time, albumin level, and platelet count remained stable. Sustained improvement of renal and neurological function and of mean arterial pressure were observed. No MARS-related adverse effects occurred. MARS treatment provides a safe approach to the treatment of EAD after OLT. On the basis of this pilot study, a multicenter randomized clinical trial that uses MARS treatment in EAD after OLT has been initiated.
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Affiliation(s)
- Hubert Hetz
- Department of Anesthesiology and General Intensive Care, Medical University of Vienna, Vienna, Austria.
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Saliba F. The Molecular Adsorbent Recirculating System (MARS) in the intensive care unit: a rescue therapy for patients with hepatic failure. Crit Care 2006; 10:118. [PMID: 16542471 PMCID: PMC1550821 DOI: 10.1186/cc4825] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Treatment in the intensive care unit of patients with end-stage liver disease has been limited. Liver transplantation has been a major improvement in this and has become standard in the management of these patients. However, many patients die awaiting liver transplantation, mainly due to the scarcity of organ donors. Conventional hemodialysis techniques have little or no effect on liver detoxification and do not improve the prognosis of these patients. In patients with acute hepatic failure, the majority of endogenous toxins leading to organ failure and accumulating in the blood are bound to albumin; therefore, the concept of albumin dialysis is of major interest. To date, the most widely developed system has been the Molecular Adsorbent Recirculating System (MARS), which is based on the selective removal of albumin-bound toxins from the blood. MARS enables simultaneous liver and kidney detoxification, improving the patient's clinical condition. It is a major improvement in the management of patients with hepatic failure that could permit, when appropriately indicated, recovery from an acute episode and enhance the chances of survival while waiting for an available organ donor.
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Affiliation(s)
- Faouzi Saliba
- AP-HP, Hôpital Paul Brousse, Service d'hépato-gastroentérologie, Villejuif, 94804, France.
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