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  1. Article ; Online: Bridging the critically ill patient with acute to chronic liver failure to liver transplantation.

    Fernández, Javier / Blasi, Annabel / Hidalgo, Ernest / Karvellas, Constantine J

    American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons

    2024  

    Abstract: Liver transplantation (LT) has emerged as an effective therapy for severe forms of acute-on-chronic liver failure (ACLF), an entity characterized by the development of multiorgan failure and high short-term mortality. The aim of critical care management ... ...

    Abstract Liver transplantation (LT) has emerged as an effective therapy for severe forms of acute-on-chronic liver failure (ACLF), an entity characterized by the development of multiorgan failure and high short-term mortality. The aim of critical care management of ACLF patients is to rapidly treat precipitating events and aggressively support failing organs to ensure that patients may successfully undergo LT or, less frequently, recover. Malnutrition and sarcopenia are frequently present, adversely impacting the prognosis of these patients. Management of critical care patients with ACLF is complex and requires the participation of different specialties. Once the patient is stabilized, a rapid evaluation for salvage LT should be performed because the time window for LT is often narrow. The development of sepsis and prolonged organ support may preclude LT or diminish its chances of success. The current review describes strategies to bridge severe ACLF patients to LT, highlights the minimal evaluation required for listing and the currently suggested contraindications to proceed with LT, and addresses different aspects of management during the perioperative and early posttransplant period.
    Language English
    Publishing date 2024-03-26
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2060594-8
    ISSN 1600-6143 ; 1600-6135
    ISSN (online) 1600-6143
    ISSN 1600-6135
    DOI 10.1016/j.ajt.2024.03.026
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Perturbations in human bile acid profiles following drug-induced liver injury investigated using semitargeted high-resolution mass spectrometry.

    Mireault, Myriam / Rose, Christopher F / Karvellas, Constantine J / Sleno, Lekha

    Rapid communications in mass spectrometry : RCM

    2024  Volume 38, Issue 9, Page(s) e9731

    Abstract: Rationale: Acetaminophen (APAP) overdose is the leading cause of acute liver failure (ALF) in North America. To investigate the effect of drug-induced liver injury (DILI) on circulating bile acid (BA) profiles, serum from ALF patients and healthy ... ...

    Abstract Rationale: Acetaminophen (APAP) overdose is the leading cause of acute liver failure (ALF) in North America. To investigate the effect of drug-induced liver injury (DILI) on circulating bile acid (BA) profiles, serum from ALF patients and healthy controls were analyzed using a semitargeted high-resolution mass spectrometry approach to measure BAs in their unconjugated and amidated forms and their glucuronide and sulfate conjugates.
    Methods: Human serum samples from 20 healthy volunteers and 34 ALF patients were combined with deuterated BAs and extracted, prior to liquid chromatography high-resolution tandem mass spectrometry analysis. A mix of 46 standards helped assign 26 BAs in human serum by accurate mass and retention time matching. Moreover, other isomers of unconjugated and amidated BAs, as well as glucuronide and sulfate conjugates, were assigned by accurate mass filtering. In vitro incubations of standard BAs provided increased information for certain peaks of interest.
    Results: A total of 275 BA metabolites, with confirmed or putative assignments, were measured in human serum samples. APAP overdose significantly influenced the levels of most BAs, promoting glycine conjugation, and, to a lesser extent, taurine conjugation. When patient outcome was considered, 11 BAs were altered significantly, including multiple sulfated species. Although many of the BAs measured did not have exact structures assigned, several putatively identified BAs of interest were further characterized using in vitro incubations.
    Conclusion: An optimized chromatographic separation tailored to BAs of ranging polarities was combined with accurate mass measurements to investigate the effect that DILI has on their complex profiles and metabolism to a much wider extent than previously possible. The analysis of complex BA profiles enabled in-depth analysis of the BA metabolism perturbations in ALF, including certain metabolites related to patient outcomes.
    MeSH term(s) Humans ; Bile Acids and Salts ; Acetaminophen/adverse effects ; Glucuronides ; Mass Spectrometry ; Chemical and Drug Induced Liver Injury/etiology ; Sulfates ; Liver
    Chemical Substances Bile Acids and Salts ; Acetaminophen (362O9ITL9D) ; Glucuronides ; Sulfates
    Language English
    Publishing date 2024-03-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 58731-x
    ISSN 1097-0231 ; 0951-4198
    ISSN (online) 1097-0231
    ISSN 0951-4198
    DOI 10.1002/rcm.9731
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Management of the acute on chronic liver failure in the intensive care unit.

    Karvellas, Constantine J / Gustot, Thierry / Fernandez, Javier

    Liver international : official journal of the International Association for the Study of the Liver

    2023  

    Abstract: Acute on chronic liver failure (ACLF) reflects the development of organ failure(s) in a patient with cirrhosis and is associated with high short-term mortality. Given that ACLF has many different 'phenotypes', medical management needs to take into ... ...

    Abstract Acute on chronic liver failure (ACLF) reflects the development of organ failure(s) in a patient with cirrhosis and is associated with high short-term mortality. Given that ACLF has many different 'phenotypes', medical management needs to take into account the relationship between precipitating insult, organ systems involved and underlying physiology of chronic liver disease/cirrhosis. The goals of intensive care management of patients suffering ACLF are to rapidly recognize and treat inciting events (e.g. infection, severe alcoholic hepatitis and bleeding) and to aggressively support failing organ systems to ensure that patients may successfully undergo liver transplantation or recovery. Management of these patients is complex since they are prone to develop new organ failures and infectious or bleeding complications. ICU therapy parallels that applied in the general ICU population in some complications but differs in others. Given that liver transplantation in ACLF is an emerging and evolving field, multidisciplinary teams with expertise in critical care and transplant medicine best accomplish management of the critically ill ACLF patient. The focus of this review is to identify the common complications of ACLF and to describe the proper management in critically ill patients awaiting liver transplantation in our centres, including organ support, prognostic assessment and how to assess when recovery is unlikely.
    Language English
    Publishing date 2023-06-27
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2102783-3
    ISSN 1478-3231 ; 1478-3223
    ISSN (online) 1478-3231
    ISSN 1478-3223
    DOI 10.1111/liv.15659
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Pretransplant management of the patient with severe acute-on-chronic liver failure.

    Kaur, Bhupinder / Cardenas, Andres / Karvellas, Constantine J

    Clinical liver disease

    2022  Volume 19, Issue 5, Page(s) 187–190

    Language English
    Publishing date 2022-05-26
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2657644-2
    ISSN 2046-2484
    ISSN 2046-2484
    DOI 10.1002/cld.1222
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: What every Intensivist should know about ... Ammonia in liver failure.

    Duarte, Tiago / Fidalgo, Pedro / Karvellas, Constantine J / Cardoso, Filipe S

    Journal of critical care

    2023  Volume 81, Page(s) 154456

    Abstract: Purpose: Acute liver failure (ALF) or acute-on-chronic liver failure (ACLF) patients have high short-term mortality and morbidity. In the context of liver failure, increased serum ammonia is associated with worse neurological outcomes, including high- ... ...

    Abstract Purpose: Acute liver failure (ALF) or acute-on-chronic liver failure (ACLF) patients have high short-term mortality and morbidity. In the context of liver failure, increased serum ammonia is associated with worse neurological outcomes, including high-grade hepatic encephalopathy (HE), cerebral edema, and intracranial hypertension. Besides its neurotoxicity, hyperammonemia may contribute to immune dysfunction and the risk of infection, a frequent trigger for multi-organ failure in these patients.
    Material and methods: We performed a literature-based narrative review. Publications available in PubMed® up to June 2023 were considered.
    Results: In the ICU management of liver failure patients, serum ammonia may play an important role. Accordingly, in this review, we focus on recent insights about ammonia metabolism, serum ammonia measurement strategies, hyperammonemia prognostic value, and ammonia-targeted therapeutic strategies.
    Conclusions: Serum ammonia may have prognostic value in liver failure. Effective ammonia targeted therapeutic strategies are available, such as laxatives, rifaximin, L-ornithine-l-aspartate, and continuous renal replacement therapy.
    MeSH term(s) Humans ; Ammonia ; Hyperammonemia/complications ; Hepatic Encephalopathy ; Acute-On-Chronic Liver Failure/therapy ; Brain Edema
    Chemical Substances Ammonia (7664-41-7)
    Language English
    Publishing date 2023-11-07
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 632818-0
    ISSN 1557-8615 ; 0883-9441
    ISSN (online) 1557-8615
    ISSN 0883-9441
    DOI 10.1016/j.jcrc.2023.154456
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Role of Terlipressin in Patients With Hepatorenal Syndrome-Acute Kidney Injury Admitted to the ICU: A Substudy of the CONFIRM Trial.

    Karvellas, Constantine J / Subramanian, Ram / Olson, Jody C / Jamil, Khurram

    Critical care explorations

    2023  Volume 5, Issue 4, Page(s) e0890

    Abstract: This study assessed the potential advantages of treating hepatorenal syndrome-acute kidney injury (HRS-AKI) with terlipressin versus placebo in the ICU setting.: Design: Patients were randomly assigned in a 2:1 ratio to receive terlipressin or placebo ...

    Abstract This study assessed the potential advantages of treating hepatorenal syndrome-acute kidney injury (HRS-AKI) with terlipressin versus placebo in the ICU setting.
    Design: Patients were randomly assigned in a 2:1 ratio to receive terlipressin or placebo for up to 14 days.
    Setting: A retrospective analysis of data from the phase III CONFIRM study.
    Participants: Adult patients with HRS-AKI admitted to the ICU.
    Main outcomes and measures: In this substudy, we evaluated outcomes of the ICU stay and the need for organ support, including renal replacement therapy (RRT).
    Results: Among 300 patients with HRS-AKI from the CONFIRM study, 45 were treated in the ICU (terlipressin, 31/199 [16%]; placebo, 14/101 [14%]). On ICU admission, baseline demographics were similar across treatment arms, including severity of liver dysfunction. Among patients alive at the end of the ICU stay, those randomized to terlipressin had a significantly shorter median length of ICU stay than placebo (4 vs 11 d;
    Conclusions: In this subanalysis of CONFIRM, patients admitted to the ICU with HRS-AKI who received terlipressin were more likely to achieve renal function improvement, based on serum creatinine changes by the end of treatment, and had significantly shorter lengths of ICU stay than patients randomized to the placebo arm.
    Language English
    Publishing date 2023-03-28
    Publishing country United States
    Document type Journal Article
    ISSN 2639-8028
    ISSN (online) 2639-8028
    DOI 10.1097/CCE.0000000000000890
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Intensive care management of liver transplant recipients.

    Olson, Jody C / Subramanian, Ram / Karvellas, Constantine J

    Current opinion in critical care

    2022  Volume 28, Issue 6, Page(s) 709–714

    Abstract: Purpose of review: Liver transplantation remains the only definitive treatment for advanced liver disease and liver failure. Current allocation schemes utilized for liver transplantation mandate a 'sickest first' approach, thus most liver transplants ... ...

    Abstract Purpose of review: Liver transplantation remains the only definitive treatment for advanced liver disease and liver failure. Current allocation schemes utilized for liver transplantation mandate a 'sickest first' approach, thus most liver transplants occur in patients with severe systemic illness. For intensive care providers who care for liver transplant recipients, a foundation of knowledge of technical considerations of orthotopic liver transplantation, basic management considerations, and common complications is essential. This review highlights the authors' approach to intensive care management of the postoperative liver transplant recipient with a review of common issues, which arise in this patient population.
    Recent findings: The number of centers offering liver transplantation continues to increase globally and the number of patients receiving liver transplantation also continues to increase. The number of patients with advanced liver disease far outpaces organ availability and, therefore, patients undergoing liver transplant are sicker at the time of transplant. Outcomes for liver transplant patients continue to improve owing to advancements in surgical technique, immunosuppression management, and intensive care management of liver disease both pretransplant and posttransplant.
    Summary: Given a global increase in liver transplantation, an increasing number of intensive care professionals are likely to care for this patient population. For these providers, a foundational knowledge of the common complications and key management considerations is essential.
    MeSH term(s) Humans ; Liver Transplantation ; Liver Failure ; Critical Care ; Immunosuppression Therapy ; Liver Diseases
    Language English
    Publishing date 2022-10-13
    Publishing country United States
    Document type Review ; Journal Article
    ZDB-ID 1235629-3
    ISSN 1531-7072 ; 1070-5295
    ISSN (online) 1531-7072
    ISSN 1070-5295
    DOI 10.1097/MCC.0000000000001002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Using technology to assess nutritional status and optimize nutrition therapy in critically ill patients.

    Dong, Victor / Karvellas, Constantine J

    Current opinion in clinical nutrition and metabolic care

    2020  Volume 24, Issue 2, Page(s) 189–194

    Abstract: Purpose of review: Malnutrition is prevalent in critically ill patients and is linked to worse outcomes such as prolonged mechanical ventilation, length of intensive care unit (ICU) stay, and increased mortality. Therefore, nutritional therapy is ... ...

    Abstract Purpose of review: Malnutrition is prevalent in critically ill patients and is linked to worse outcomes such as prolonged mechanical ventilation, length of intensive care unit (ICU) stay, and increased mortality. Therefore, nutritional therapy is important. However, it is often difficult to accurately identify those at high malnutrition risk and to optimize nutritional support. Different technological modalities have therefore been developed to identify patients at high nutritional risk and to guide nutritional support in an attempt to optimize outcomes.
    Recent findings: Computed tomography (CT), ultrasound (US), and bioelectrical impedance analysis are tools that allow assessment of lean body mass and detection of sarcopenia, which is a significant marker of poor nutrition. The use of indirect calorimetry allows the determination of resting energy expenditure to serve as a guide to providing optimal nutrition intake in ICU patients.
    Summary: By using CT, US, or bioelectrical impedance analysis, detection of sarcopenia can be undertaken in patients admitted to the ICU. This allows for an accurate picture of underlying nutritional status to help clinicians focus on nutritional support for these patients. Subsequently, indirect calorimetry can be used to guide optimal nutrition therapy and caloric intake in critically ill patients. However, whether these methods result in improved outcomes in critically ill patients remains to be validated.
    MeSH term(s) Critical Illness ; Energy Intake ; Humans ; Intensive Care Units ; Nutrition Therapy ; Nutritional Status ; Nutritional Support ; Technology
    Language English
    Publishing date 2020-12-06
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1460178-3
    ISSN 1473-6519 ; 1363-1950
    ISSN (online) 1473-6519
    ISSN 1363-1950
    DOI 10.1097/MCO.0000000000000721
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Continuous renal replacement therapy and survival in acute liver failure: A systematic review and meta-analysis.

    Dong, Victor / Robinson, Andrea M / Dionne, Joanna C / Cardoso, Filipe S / Rewa, Oleksa G / Karvellas, Constantine J

    Journal of critical care

    2024  Volume 81, Page(s) 154513

    Abstract: Objective: Acute liver failure (ALF) is a rare syndrome leading to significant morbidity and mortality. An important cause of mortality is cerebral edema due to hyperammonemia. Different therapies for hyperammonemia have been assessed including ... ...

    Abstract Objective: Acute liver failure (ALF) is a rare syndrome leading to significant morbidity and mortality. An important cause of mortality is cerebral edema due to hyperammonemia. Different therapies for hyperammonemia have been assessed including continuous renal replacement therapy (CRRT). We conducted a systematic review and meta-analysis to determine the efficacy of CRRT in ALF patients.
    Materials and methods: We searched MEDLINE, EMBASE, Cochrane Library, and Web of Science. Inclusion criteria included adult patients admitted to an ICU with ALF. Intervention was the use of CRRT for one or more indications with the comparator being standard care without the use of CRRT. Outcomes of interest were overall survival, transplant-free survival (TFS), mortality and changes in serum ammonia levels.
    Results: In total, 305 patients underwent CRRT while 1137 patients did not receive CRRT. CRRT was associated with improved overall survival [risk ratio (RR) 0.83, 95% confidence interval (CI) 0.70-0.99, p-value 0.04, I
    Conclusion: Use of CRRT in ALF patients is associated with improved overall and transplant-free survival compared to no CRRT.
    MeSH term(s) Adult ; Humans ; Continuous Renal Replacement Therapy ; Renal Replacement Therapy/adverse effects ; Ammonia ; Hyperammonemia/etiology ; Liver Failure, Acute/therapy ; Acute Kidney Injury/therapy
    Chemical Substances Ammonia (7664-41-7)
    Language English
    Publishing date 2024-01-09
    Publishing country United States
    Document type Meta-Analysis ; Systematic Review ; Journal Article
    ZDB-ID 632818-0
    ISSN 1557-8615 ; 0883-9441
    ISSN (online) 1557-8615
    ISSN 0883-9441
    DOI 10.1016/j.jcrc.2023.154513
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Acute Liver Failure: Biomarkers Evaluated by the Acute Liver Failure Study Group.

    Rakela, Jorge L / Karvellas, Constantine J / Koch, David G / Vegunta, Suneela / Lee, William M

    Clinical and translational gastroenterology

    2023  Volume 14, Issue 4, Page(s) e00565

    Abstract: There has been a growing interest in identifying prognostic biomarkers that alone or with available prognostic models (King's College Criteria, KCC; MELD and ALFSG Prognostic Index) would improve prognosis in acute liver failure (ALF) patients being ... ...

    Abstract There has been a growing interest in identifying prognostic biomarkers that alone or with available prognostic models (King's College Criteria, KCC; MELD and ALFSG Prognostic Index) would improve prognosis in acute liver failure (ALF) patients being assessed for liver transplantation. The Acute Liver Failure Study Group (ALFSG) has evaluated 15 potential prognostic biomarkers: serum AFP; apoptosis-associated proteins; serum actin-free Gc-globulin; serum glycodeoxycholic acid; sRAGE/RAGE ligands; plasma osteopontin; circulating MBL, M-, L-, H-ficolin and CL-1; plasma galectin-9; serum FABP1; serum Lct2; miRNAs; factor V; thrombocytopenia, and sCD163. The ALFSG also has reported on 4 susceptibility biomarkers: keratins 8 and 18 (K8/K18) gene variants; polymorphisms of genes encoding putative APAP-metabolizing enzymes ( UGT1A1 , UGT 1A0 , UGT 2B15 , SULT1A1 , CYP2E1 , and CYP3A5 ) as well as CD44 and BHMT1

    single nucleotide polymorphisms (SNPs) of genes associated with human behavior, rs2282018 in the arginine vasopressin ( AVP ) gene and rs11174811 in the AVP receptor 1A gene. Finally, rs2277680 of the CSCL16 gene in HBV-ALF patients. In conclusion, we have reviewed the prognostic and susceptibility biomarkers studied by the ALFSG. We suggest that a better approach to predicting the clinical outcome of an ALF patient will require a combination of biomarkers of pathogenic processes such as cell death, hepatic regeneration, and degree of inflammation that could be incorporated into prognostic models such as KCC, MELD or ALFSG PI.
    MeSH term(s) Humans ; ROC Curve ; Biomarkers ; Prognosis ; Liver Failure, Acute/diagnosis ; Liver Failure, Acute/genetics ; Polymorphism, Single Nucleotide
    Chemical Substances Biomarkers
    Language English
    Publishing date 2023-04-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2581516-7
    ISSN 2155-384X ; 2155-384X
    ISSN (online) 2155-384X
    ISSN 2155-384X
    DOI 10.14309/ctg.0000000000000565
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