Liver support systems today

2009 ◽  
Vol 150 (51) ◽  
pp. 2299-2307 ◽  
Author(s):  
Csaba Rikker
Keyword(s):  
Support Systems ◽  
High Flux ◽  
Albumin Dialysis ◽  
Liver Support ◽  
Dialysis Unit ◽  
Single Pass ◽  
Molecular Adsorbent Recirculating System ◽  
Molecular Adsorbent

A májelégtelenség – akár korábbi májbetegség fennállása nélkül alakult ki (akut májelégtelenség), akár krónikus májbetegség akut dekompenzációja („akut a krónikuson” májelégtelenség) következménye – magas halálozással jár. A végállapotú májbetegségek következtében kialakult májelégtelenség egyetlen kuratív megoldása ma a májtranszplantáció. Ennek fő gátját a rendelkezésre álló donorszervek hiánya képezi, emiatt sok, várólistán szereplő beteg exitál. A transzplantáció korlátai tették szükségessé olyan májtámogató rendszerek kifejlesztését, amelyek alkalmasak a beteg életben tartására a szervátültetésig vagy a máj regenerációjáig. A korai próbálkozások (hemodialízis, hemoperfúzió, cseretranszfúzió, kereszthemodialízis, keresztkeringés, plazmaferézis stb.) elégtelennek bizonyultak. Napjainkban a májpótló kezelésnek két fő iránya alakult ki: a sejtalapú, úgynevezett bioarteficiális és a nem sejtalapú, úgynevezett arteficiális rendszerek. A bioarteficiális rendszerek élő állati májsejteket vagy emberi májtumorsejteket tartalmaznak. Jellegzetességük, hogy a beteg vérét vagy szeparált plazmáját a májsejteket tartalmazó bioreaktoron áramoltatják át. Elviekben a májműködést ezek a metodikák modellezik a legtökéletesebben, mert a máj szintetizáló- és detoxikálófunkcióját egyaránt pótolják. Jelenlegi formájukban azonban még távol állnak az ideális megoldástól, alkalmazásuk számos immunológiai, infektológiai, onkológiai és financiális problémát vet fel, ezért egyelőre csak kísérleti célra állnak rendelkezésre. Az arteficiális rendszerek a klinikum számára már elérhetőek, bár széles körben még nem terjedtek el. Csak a máj detoxikálófunkcióját pótolják, a szintetikus funkció részben a hiányzó anyagok (plazmaproteinek, alvadási faktorok) szubsztitúciójával pótolható. Idetartozik a hemodiabszorpció, amely az Amerikai Egyesült Államokban terjedt el (liver dialysis unit), valamint a főleg Európában használatos albumindialízis és a legújabban kifejlesztett frakcionált plazmaszeparáció és -adszorpció (FPSA). Az albumindialízis egyszerű módszere a „single pass albumin dialysis” (SPAD), ennek továbbfejlesztett változata a „molecular adsorbent recirculating system” (MARS). Az FPSA high-flux hemodialízissel kiegészített változata a Prometheus-rendszer. Bár a felsorolt módszerek hatásosságát számos kísérleti és klinikai tanulmány támasztja alá, a konzervatív kezeléssel szemben a túlélésre kifejtett előnyös hatásuk bizonyítására még nagy esetszámot felölelő, randomizált, kontrollált vizsgálatok elvégzésére van szükség.

scholarly journals Extracorporal methods for liver failure treatment

2014 ◽  
Vol 95 (1) ◽  
pp. 75-79 ◽  
Author(s):  
D E Kutepov
Keyword(s):  
Liver Failure ◽  
Support Systems ◽  
Isolated Hepatocytes ◽  
Liver Support ◽  
Failure Treatment ◽  
Molecular Adsorbent Recirculating System ◽  
Extracorporeal Liver Support ◽  
Long Time ◽  
Biological Methods ◽  
Molecular Adsorbent

A mortality rate in patients with liver failure remains high. Currently the main causes for liver failure are viral hepatitis and alcoholic liver disease. As a result of liver detoxification malfunction a number of complications, including hepatic encephalopathy, hepatorenal syndrome, circulatory disorders develop. Different types of extracorporeal therapies and their combination are used to treat the liver failure for a long time. Figuratively, extracorporeal liver support systems can be divided into two groups: biological and non-biological. Biological methods are based on the use of isolated hepatocytes suspension. Non-biological methods include dialysis, hemofiltration, plasma exchange, hemosorption, Molecular Adsorbent Recirculating System (MARS) and fractionated plasma separation and adsorption (FPSA or Prometheus). Modern technologies allowed to combine liver support systems into a whole and to create an additional method of liver failure treatment — Molecular Adsorbent Recirculating System (MARS). Currently, MARS is a promising trend of liver failure treatment, as it allows support the liver function for a long time until restored or an optimal donor will be found.

scholarly journals Outcome of patients treated with molecular adsorbent recirculating system albumin dialysis: A national multicenter study

JGH Open ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 757-763
Author(s):  
Christophe Camus ◽  
Clara Locher ◽  
Faouzi Saliba ◽  
Bernard Goubaux ◽  
Agnès Bonadona ◽  
...  
Keyword(s):  
Multicenter Study ◽  
Albumin Dialysis ◽  
Molecular Adsorbent Recirculating System ◽  
Molecular Adsorbent

scholarly journals Successful elimination of bilirubin in critically ill patients with acute liver dysfunction using a cytokine adsorber and albumin dialysis: a pilot study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Christina Scharf ◽  
Uwe Liebchen ◽  
Michael Paal ◽  
Andrea Becker-Pennrich ◽  
Michael Irlbeck ◽  
...  
Keyword(s):  
Liver Dysfunction ◽  
Total Bilirubin ◽  
Wilcoxon Test ◽  
Organ Support ◽  
Relative Reduction ◽  
High Flux ◽  
Albumin Dialysis ◽  
Liver Support ◽  
Artificial Liver Support ◽  
Significant Difference

AbstractThere are different methods of artificial liver support for patients with acute liver dysfunction (ALD). However, CytoSorb (CS) might be a new approved option for those patients. Question of interest is whether the elimination performance of CS was comparable to that of advanced organ support (ADVOS). Patients, treated with CS (integrated into high-flux dialysis) or ADVOS and a total bilirubin > 10 mg/dl were included. Laboratory parameters were evaluated before starting therapy (d0) and 12–24 h thereafter (d1). The Wilcoxon-test with associated samples was used for statistical analysis. Thirty-nine patients (33 CS, 6 ADVOS) were included. The median bilirubin at d0 was 16.9 and 17.7 mg/dl and at d1 was 13.2 and 15.9 mg/dl, in the CS and ADVOS group, respectively. There was a significant bilirubin reduction as well in the CS group (p < 0.001, median relative reduction: 22.5%) as in the ADVOS group (p = 0.028, median relative reduction: 22.8%). There was no significant difference in the relative bilirubin reduction between CS and ADVOS therapies. The use of CytoSorb and ADVOS in patients with ALD led to a significant and comparable decrease in total bilirubin. The easy use of CS might be an advantage compared to other procedures.

scholarly journals Meta-analysis of individual patient data of albumin dialysis in acute-on-chronic liver failure: focus on treatment intensity

2019 ◽  
Vol 12 ◽  
pp. 175628481987956 ◽  
Author(s):  
Rafael Bañares ◽  
Luis Ibáñez-Samaniego ◽  
Josep María Torner ◽  
Marco Pavesi ◽  
Carmen Olmedo ◽  
...  
Keyword(s):  
Liver Failure ◽  
Individual Patient Data ◽  
Meta Analysis ◽  
Patient Data ◽  
Chronic Liver ◽  
Treatment Intensity ◽  
Chronic Liver Failure ◽  
Albumin Dialysis ◽  
Liver Support ◽  
Molecular Adsorbent Recirculating System

Background: Acute-on-chronic liver failure (ACLF) is a common complication of cirrhosis characterized by single or multiple organ failures and high short-term mortality. Treatment of ACLF consists of standard medical care (SMC) and organ(s) support. Whether the efficacy of artificial liver support (ALS) depends on the severity of ACLF or on the intensity of this treatment, or both, is unclear. This study aimed to further assess these issues. Methods: We performed an individual patient data meta-analysis assessing the efficacy of Molecular Adsorbent Recirculating System (MARS) in ACLF patients enrolled in prior randomized control trials (RCTs). The meta-analysis was designed to assess the effect of patient severity (ACLF grade) and treatment intensity [low-intensity therapy (LIT), SMC alone or SMC plus ⩽ 4 MARS sessions, high-intensity therapy (HIT), SMC plus > 4 MARS sessions] on mortality. Results: Three RCTs suitable for the meta-analysis ( n = 285, ACLF patients = 165) were identified in a systematic review. SMC plus MARS (irrespective of the number of sessions) did not improve survival compared with SMC alone, neither in the complete population nor in the ACLF patients. Survival, however, was significantly improved in the subgroup of patients receiving HIT both in the entire cohort (10-day survival: 98.6% versus 82.8%, p = 0.001; 30-day survival: 73.9% versus 64.3%, p = 0.032) and within the ACLF patients (10-day survival: 97.8% versus 78.6%, p = 0.001; 30-day survival: 73.3% versus 58.5%, p = 0.041). Remarkably, HIT increased survival independently of ACLF grade. Independent predictors of survival were age, Model for End-Stage Liver Disease (MELD), ACLF grade, number of MARS sessions received, and intensity of MARS therapy. Conclusion: HIT with albumin dialysis may improve survival in patients with ACLF. Appropriate treatment schedules should be determined in future clinical trials.

scholarly journals Albumin dialysis with molecular adsorbent recirculating system (MARS) for the treatment of hepatic encephalopathy in liver failure

2011 ◽  
Vol 10 ◽  
pp. S70-S76 ◽  
Author(s):  
Ramón A. Kobashi-Margáin ◽  
Juan G. Gavilanes-Espinar ◽  
Ylse Gutiérrez-Grabe ◽  
Ángel A. Gutiérrez-Jiménez ◽  
Norberto Chávez-Tapia ◽  
...  
Keyword(s):  
Hepatic Encephalopathy ◽  
Liver Failure ◽  
Albumin Dialysis ◽  
Molecular Adsorbent Recirculating System ◽  
Molecular Adsorbent

scholarly journals Single-Pass Albumin Dialysis in the Treatment of Children with Liver Failure

2019 ◽  
Vol 49 (1-2) ◽  
pp. 55-62
Author(s):  
Johannes Holle ◽  
Alexander Gratopp ◽  
Sophie Balmer ◽  
Verena Varnholt ◽  
Stephan Henning ◽  
...  
Keyword(s):  
Liver Failure ◽  
Pediatric Patients ◽  
Serum Levels ◽  
Albumin Dialysis ◽  
Liver Support ◽  
Single Pass ◽  
Medical Chart Review ◽  
Extracorporeal Liver Support ◽  
Life Threatening ◽  
Catecholamine Therapy

Background and Aims: Acute and acute on chronic liver failure are life-threatening conditions, and bridging to transplantation is complicated by a paucity of suitable organs for children. While different modalities of extracorporeal liver support exist, their use in children is complicated by a large extracorporeal volume, and data on their use in children is limited. The aim of this analysis was to investigate the efficacy and safety of single-pass albumin dialysis (SPAD) in children with liver failure. Methods: Retrospective medical chart review of pediatric patients with liver failure treated with SPAD. The decrease in hepatic encephalopathy (HE) and the serum levels of bilirubin and ammonia were measured to determine efficacy. Adverse events were documented to assess safety. Results: Nineteen pediatric patients with a median age of 25.5 months and a median body weight of 11.9 kg were treated with SPAD between January 2011 and March 2018. Total bilirubin (p < 0.001) and ammonia (p = 0.02) significantly decreased after treatment with SPAD. As clinical outcome parameter, HE significantly improved (p = 0.001). Twelve patients were bridged successfully to liver transplantation. In all patients, 71 SPAD sessions were run. Clotting in the dialysis circuit was observed in 49% of all sessions. Heparin and citrate were used for anticoagulation and were significantly superior to dialysis without any anticoagulation (p= 0.03). Transfusion of packed blood cells (57%) and catecholamine therapy (49%) were frequently necessary. Conclusions: Treatment with SPAD was effective in detoxification, as measured by significant improvement of HE and clearance from surrogate laboratory parameters.

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