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La Mura V, Bitto N, Tripodi A. Rational hemostatic management in cirrhosis: from old paradigms to new clinical challenges. Expert Rev Hematol 2022; 15:1031-1044. [PMID: 36342412 DOI: 10.1080/17474086.2022.2144217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
INTRODUCTION Patients with cirrhosis are at risk of both thrombotic and hemorrhagic events. Traditional hemostatic tests are inadequate to assess the complex and fragile balance of hemostasis in this setting, especially in advanced stages of disease such as decompensated cirrhosis or acute on chronic liver failure (ACLF). Furthermore, the indiscriminate use of pro-hemostatic agents for prophylaxis and treatment of bleeding episodes is still debated and often contraindicated. Alongside, splanchnic, and peripheral thrombotic events are frequent in this population and require management that involves a careful balance between risks and benefits of antithrombotic therapy. AREAS COVERED This review aims to address the state of the art on the clinical management of the hemostatic balance of cirrhosis in terms of established knowledge and future challenges. EXPERT OPINION The old paradigm of cirrhosis as a naturally anticoagulated condition has been challenged by more sophisticated global tests of hemostasis. Integrating this information in the clinical decision-making is still challenging for physicians and experts in hemostasis.
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Affiliation(s)
- Vincenzo La Mura
- Fondazione I.R.C.C.S. Ca' Granda, Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Milan, Italy.,Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - Niccolò Bitto
- Fondazione I.R.C.C.S. Ca' Granda, Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Milan, Italy.,Department of Biomedical Sciences for Health, Università degli studi di Milano, Milan, Italy
| | - Armando Tripodi
- Fondazione I.R.C.C.S. Ca' Granda, Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Milan, Italy
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52
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Durgham A, Tessier S, Ido F, Longo S, Nanda S. Congenital Portosystemic Shunts in Cirrhosis and Portal Vein Thrombosis: A Case Report. Cureus 2022; 14:e31587. [DOI: 10.7759/cureus.31587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/15/2022] [Indexed: 11/18/2022] Open
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Preprocedural prophylaxis with blood products in patients with cirrhosis: Results from a survey of the Italian Association for the Study of the Liver (AISF). Dig Liver Dis 2022; 54:1520-1526. [PMID: 35474168 DOI: 10.1016/j.dld.2022.03.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/23/2022] [Accepted: 03/25/2022] [Indexed: 02/08/2023]
Abstract
INTRODUCTION The concept of rebalanced hemostasis in cirrhosis challenges the policy of transfusing plasma or platelets before invasive procedures in patients with prolonged PT or severe thrombocytopenia. Recent guidelines recommend against plasma transfusion and suggest avoiding/minimizing platelet transfusions. AIM We assessed how hepato-gastroenterologists manage prolonged PT/INR or severe thrombocytopenia before invasive procedures. METHODS On May 2021, AISF members were sent a questionnaire addressing the PT/INR and platelet thresholds required before invasive procedures, the use of other markers of bleeding risk or other hemostatic treatments and the burden of pre-emptive plasma and platelet transfusions. RESULTS Of 62 respondents, 94% and 100% use PT/INR and platelet count to assess bleeding risk, respectively. Only 37% and 32% require less conservative PT/INR or platelet counts thresholds for low-risk procedures, respectively. As for those applying single thresholds, 68% require PT/INR <1,5 and 86% require platelet counts ≥50 × 109/L. Half respondents use additional indicators of bleeding risk and 63% other hemostatic treatments. Low-risk procedures account for 70% of procedures, and for 50% and 59% of plasma and platelets units transfused, respectively. CONCLUSIONS the survey indicates lack of compliance with guidelines that advise against plasma and platelet transfusions before invasive procedures and the need for prospective studies and inter-society consensus workshops.
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Odriozola A, Puente Á, Cuadrado A, Rivas C, Anton Á, González FJ, Pellón R, Fábrega E, Crespo J, Fortea JI. Portal Vein Thrombosis in the Setting of Cirrhosis: A Comprehensive Review. J Clin Med 2022; 11:6435. [PMID: 36362663 PMCID: PMC9655000 DOI: 10.3390/jcm11216435] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 10/26/2022] [Accepted: 10/28/2022] [Indexed: 08/06/2023] Open
Abstract
Portal vein thrombosis constitutes the most common thrombotic event in patients with cirrhosis, with increased rates in the setting of advanced liver disease. Despite being a well-known complication of cirrhosis, the contribution of portal vein thrombosis to hepatic decompensation and overall mortality is still a matter of debate. The incorporation of direct oral anticoagulants and new radiological techniques for portal vein recanalization have expanded our therapeutic arsenal. However, the lack of large prospective observational studies and randomized trials explain the heterogenous diagnostic and therapeutic recommendations of current guidelines. This article seeks to make a comprehensive review of the pathophysiology, clinical features, diagnosis, and treatment of portal vein thrombosis in patients with cirrhosis.
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Affiliation(s)
- Aitor Odriozola
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Ángela Puente
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Antonio Cuadrado
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Coral Rivas
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Ángela Anton
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | | | - Raúl Pellón
- Radiology Department, Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Emilio Fábrega
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Javier Crespo
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - José Ignacio Fortea
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
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Roberts LN, Hernandez-Gea V, Magnusson M, Stanworth S, Thachil J, Tripodi A, Lisman T. Thromboprophylaxis for venous thromboembolism prevention in hospitalized patients with cirrhosis: Guidance from the SSC of the ISTH. J Thromb Haemost 2022; 20:2237-2245. [PMID: 35948998 DOI: 10.1111/jth.15829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 07/08/2022] [Accepted: 07/18/2022] [Indexed: 11/26/2022]
Abstract
Hospital-associated venous thromboembolism (HA-VTE) is a major cause of morbidity and mortality and is internationally recognized as a significant patient safety issue. While cirrhosis was traditionally considered to predispose to bleeding, these patients are also at an increased risk of VTE, with an associated increase in mortality. Hospitalization rates of patients with cirrhosis are increasing, and decisions regarding thromboprophylaxis are complex due to the uncertain balance between thrombosis and bleeding risk. This is further accentuated by derangements of hemostasis in patients with cirrhosis that are often considered contraindications to pharmacological thromboprophylaxis. Due to the strict inclusion and exclusion criteria of seminal studies of VTE risk assessment and thromboprophylaxis, there is limited data to guide decision making in this patient group. This guidance document reviews the incidence and risk factors for HA-VTE in patients with cirrhosis, outlines evidence to inform the use of thromboprophylaxis, and provides pragmatic recommendations on VTE prevention for hospitalized patients with cirrhosis. In brief, in hospitalized patients with cirrhosis: We suggest inclusion of portal vein thrombosis as a distinct clinically important endpoint for future studies. We recommend against the use of thrombocytopenia and/or prolongation of prothrombin time/international normalized ratio as absolute contraindications to anticoagulant thromboprophylaxis. We suggest anticoagulant thromboprophylaxis in line with local protocols and suggest low molecular weight heparin (LMWH) or fondaparinux over unfractionated heparin (UFH). In renal impairment, we suggest LMWH over UFH. For critically ill patients, we suggest case-by-case consideration of thromboprophylaxis. We recommend research to refine VTE risk stratification, and to establish the optimal dosing and duration of thromboprophylaxis.
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Affiliation(s)
- Lara N Roberts
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital, London, UK
| | - Virginia Hernandez-Gea
- Barcelona Hepatic Hemodynamic Laboratory, Liver Unit, Hospital Clínic, IDIBAPS, University of Barcelona, Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Health Care Provider of the European Reference Network on Rare Liver Disorders (ERN-Liver), Barcelona, Spain
| | - Maria Magnusson
- Clinical Chemistry and Blood Coagulation Research, MMK, Department of Pediatrics, CLINTEC, Karolinska Institutet, Department of Hematology, Karolinska University Hospital, Stockholm, Sweden
| | - Simon Stanworth
- Transfusion Medicine, NHS Blood and Transplant, Oxford, UK
- Department of Haematology, Oxford University Hospitals, NHS Foundation Trust, Oxford, UK
- Radcliffe Department of Medicine, University of Oxford and NIHR Oxford Biomedical Research Centre (Haematology), Oxford, UK
| | - Jecko Thachil
- Department of Haematology, Manchester Royal Infirmary, Manchester, UK
| | - Armando Tripodi
- IRCCS Ca' Granda Maggiore Hospital Foundation, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center and Fondazione Luigi Villa, Milan, Italy
| | - Ton Lisman
- Surgical Research Laboratory and Section of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
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Wang L, Guo X, Bai Z, Yin Y, Xu S, Pan J, Mancuso A, Noronha Ferreira C, Qi X. Impact of Asymptomatic Superior Mesenteric Vein Thrombosis on the Outcomes of Patients with Liver Cirrhosis. Thromb Haemost 2022; 122:2019-2029. [PMID: 36179738 DOI: 10.1055/s-0042-1756648] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
BACKGROUND The impact of asymptomatic superior mesenteric vein (SMV) thrombosis on the outcomes of cirrhotic patients remains uncertain. METHODS Nonmalignant cirrhotic patients who were consecutively admitted between December 2014 and September 2021 and underwent contrast-enhanced computed tomography/magnetic resonance imaging scans were screened. Portal venous system thrombosis (PVST) was identified. Death and hepatic decompensation were the outcomes of interest. Nelson-Aalen cumulative risk curve analysis and competing risk regression analysis were performed to evaluate the impact of asymptomatic SMV thrombosis and portal vein thrombosis (PVT) on the outcomes. RESULTS Overall, 475 patients were included, of whom 67 (14.1%) had asymptomatic SMV thrombosis, 95 (20%) had PVT, and 344 (72.4%) did not have any PVST. Nelson-Aalen cumulative risk curve analyses showed that the cumulative incidences of death (p = 0.653) and hepatic decompensation (p = 0.630) were not significantly different between patients with asymptomatic SMV thrombosis and those without PVST, but the cumulative incidences of death (p = 0.021) and hepatic decompensation (p = 0.004) were significantly higher in patients with PVT than those without PVST. Competing risk regression analyses demonstrated that asymptomatic SMV thrombosis was not a significant risk factor for death (subdistribution hazard ratio [sHR] = 0.89, p = 0.65) or hepatic decompensation (sHR = 1.09, p = 0.63), but PVT was a significant risk factor for death (sHR = 1.56, p = 0.02) and hepatic decompensation (sHR = 1.50, p = 0.006). These statistical results remained in competing risk regression analyses after adjusting for age, sex, and Child-Pugh score. CONCLUSIONS Asymptomatic SMV thrombosis may not influence the outcomes of cirrhotic patients. The timing of intervention for asymptomatic SMV thrombosis in liver cirrhosis should be further explored.
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Affiliation(s)
- Le Wang
- Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command, Shenyang, China.,Postgraduate College, China Medical University, Shenyang, China
| | - Xiaozhong Guo
- Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command, Shenyang, China.,Postgraduate College, China Medical University, Shenyang, China
| | - Zhaohui Bai
- Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command, Shenyang, China.,Postgraduate College, Shenyang Pharmaceutical University, Shenyang, China
| | - Yue Yin
- Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command, Shenyang, China
| | - Shixue Xu
- Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command, Shenyang, China.,Postgraduate College, China Medical University, Shenyang, China
| | - Jiahui Pan
- Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command, Shenyang, China.,Postgraduate College, Shenyang Pharmaceutical University, Shenyang, China
| | - Andrea Mancuso
- Medicina Interna 1, Azienda di Rilievo Nazionale ad Alta Specializzazione Civico, Di Cristina-Benfratelli, Palermo, Italy
| | - Carlos Noronha Ferreira
- Serviço De Gastrenterologia e Hepatologia, Hospital De Santa Maria-Centro Hospitalar Lisboa Norte, Lisboa, Portugal
| | - Xingshun Qi
- Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command, Shenyang, China.,Postgraduate College, China Medical University, Shenyang, China.,Postgraduate College, Shenyang Pharmaceutical University, Shenyang, China
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Zurcher KS, Smith MV, Naidu SG, Saini G, Patel IJ, Knuttinen MG, Kriegshauser JS, Oklu R, Alzubaidi SJ. Transsplenic Portal System Catheterization: Review of Current Indications and Techniques. Radiographics 2022; 42:1562-1576. [PMID: 35984753 DOI: 10.1148/rg.220042] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Multiple diseases of the portal system require effective portal vein access for endovascular management. While percutaneous transhepatic and transjugular approaches remain the standard methods of portal vein access, transsplenic access (TSA) has gained recognition as an effective and safe technique to access the portal system in patients with contraindications to traditional approaches. Recently, the utility of percutaneous TSA has grown, with described treatments including recanalization of chronic portal vein occlusion, placement of stents for portal vein stenosis, portal vein embolization of the liver, embolization of gastric varices, placement of complicated transjugular intrahepatic portosystemic shunts, and interventions after liver transplant. The authors provide a review of percutaneous TSA, including indications, a summary of related portal vein diseases, and the different techniques used for access and closure. In addition, an imaging-based review of technical considerations of TSA interventions is presented, with a review of potential procedural complications. With technical success rates that mirror or rival the standard methods and reported low rates of major complications, TSA can be a safe and effective option in clinical scenarios where traditional approaches are not feasible. ©RSNA, 2022.
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Affiliation(s)
- Kenneth S Zurcher
- From the Division of Vascular and Interventional Radiology, Mayo Clinic, 5777 E Mayo Blvd, Phoenix, AZ 85054
| | - Mathew V Smith
- From the Division of Vascular and Interventional Radiology, Mayo Clinic, 5777 E Mayo Blvd, Phoenix, AZ 85054
| | - Sailendra G Naidu
- From the Division of Vascular and Interventional Radiology, Mayo Clinic, 5777 E Mayo Blvd, Phoenix, AZ 85054
| | - Gia Saini
- From the Division of Vascular and Interventional Radiology, Mayo Clinic, 5777 E Mayo Blvd, Phoenix, AZ 85054
| | - Indravadan J Patel
- From the Division of Vascular and Interventional Radiology, Mayo Clinic, 5777 E Mayo Blvd, Phoenix, AZ 85054
| | - M Grace Knuttinen
- From the Division of Vascular and Interventional Radiology, Mayo Clinic, 5777 E Mayo Blvd, Phoenix, AZ 85054
| | - J Scott Kriegshauser
- From the Division of Vascular and Interventional Radiology, Mayo Clinic, 5777 E Mayo Blvd, Phoenix, AZ 85054
| | - Rahmi Oklu
- From the Division of Vascular and Interventional Radiology, Mayo Clinic, 5777 E Mayo Blvd, Phoenix, AZ 85054
| | - Sadeer J Alzubaidi
- From the Division of Vascular and Interventional Radiology, Mayo Clinic, 5777 E Mayo Blvd, Phoenix, AZ 85054
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58
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McMurry H, Sabile JM, Elstrott B, Chobrutskiy B, Mohinani A, Patel S, Gowda S, Martens K, Shatzel J. Clinical predictors for thrombus progression in cirrhotic patients with untreated splanchnic vein thrombosis. Thromb Res 2022; 216:1-7. [PMID: 35660708 PMCID: PMC9464500 DOI: 10.1016/j.thromres.2022.05.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/07/2022] [Accepted: 05/23/2022] [Indexed: 02/03/2023]
Abstract
INTRODUCTION Splanchnic vein thrombosis (SVT) occurs in a heterogenous group of patients secondary to a variety of risk factors including liver disease. Minimal data regarding natural history and outcomes of SVT exists to inform management decisions. As such, there is equipoise regarding the utility of anticoagulation in cirrhotic patients with SVT. We sought to identify clinical factors predictive of new or progressive thrombosis in a cohort of patients with untreated SVT. METHODS We conducted a retrospective cohort study of cirrhotic patients over 18 years of age diagnosed with SVT at the Oregon Health & Science University from 2015 to 2020, excluding those initially treated with anticoagulation. The primary study endpoint was a composite of the following: imaging-confirmed progression of SVT, development of cavernous transformation, intestinal ischemia, portal cholangiopathy or new venous or arterial thrombosis. RESULTS 261 patients were included in the analysis (median age 61 years, 68% male, 32% female). Forty percent of all patients experienced the primary composite endpoint. Multivariable logistic regression found that only the presence of pancreatitis or abdominal infection at diagnosis was associated with an increased likelihood of experiencing thrombus progression in patients with untreated SVT (OR 3.61, P = 0.02). There was a statistically significant overall survival difference between patients that did and did not experience the primary composite endpoint after controlling for confounding variables. (p = 0.0068). CONCLUSIONS Overall, only the presence of pancreatitis or intrabdominal infection were found to be significantly associated with thrombotic progression, with varices identified as marginally non-significant risk factor. Notably, thrombotic progression was associated with a significant reduction in overall survival.
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Affiliation(s)
- Hannah McMurry
- Division of Internal Medicine, Oregon Health & Science University, Portland, OR, United States of America,Corresponding author at: Department of Medicine, South Waterfront Office 3485, S. Bond Avenue, Portland, OR 97239, United States of America. (H. McMurry)
| | - Jean M.G. Sabile
- Division of Internal Medicine, Oregon Health & Science University, Portland, OR, United States of America
| | - Benjamin Elstrott
- Oregon Health and Science University Medical School, Portland, OR, United States of America
| | - Boris Chobrutskiy
- Division of Internal Medicine, Oregon Health & Science University, Portland, OR, United States of America
| | - Ajay Mohinani
- Division of Internal Medicine, Oregon Health & Science University, Portland, OR, United States of America
| | - Sarah Patel
- Division of Internal Medicine, Oregon Health & Science University, Portland, OR, United States of America
| | - Sonia Gowda
- Division of Internal Medicine, Oregon Health & Science University, Portland, OR, United States of America
| | - Kylee Martens
- Division of Hematology and Oncology, Oregon Health & Science University, Portland, OR, United States of America
| | - Joseph Shatzel
- Division of Hematology and Oncology, Oregon Health & Science University, Portland, OR, United States of America,Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, United States of America
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Sperry JD, Rose AE, Williams E, Dierks MR, Medow JE. Emergent Reversal of Antithrombotics and Treatment of Life-Threatening Bleeding from Coagulopathies: A Clinical Review. J Emerg Med 2022; 63:17-48. [PMID: 35918220 DOI: 10.1016/j.jemermed.2022.05.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 04/29/2022] [Accepted: 05/09/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Reversal of antithrombotic agents and treatment of life-threatening bleeding episodes from coagulopathies can be a stressful scenario for clinicians, especially when the selection of treatment options should occur quickly. Understanding the options available for these agents requires emergency physicians to be familiar with the current data surrounding new therapies and dosing strategies for the treatment of bleeding from reversible and nonreversible antithrombotics and coagulopathic conditions. OBJECTIVE To provide quick resource guides for the reversal of major or life-threatening bleeding caused by antithrombotic agents or in the setting of coagulopathies. METHODS A literature search for articles published through September 2021 related to antithrombotic reversal and treatment of acute bleeding from coagulopathies was conducted using the PubMed clinical database. Selected articles were used to generate 5 guidance tables in this clinical review. DISCUSSION Four guidance tables for how to treat major or life-threatening bleeding from antithrombotic agents and 1 table for how to manage life-threatening bleeding for coagulopathies are presented as a quick reference tool for the emergency physician. Additional information on upcoming reversal agents and possible treatment options are provided herein. CONCLUSIONS In this clinical review, a series of 5 tables were created to provide quick and comprehensive guidance for the emergency physician when treating major or life-threatening bleeding caused by antithrombotic agents or coagulopathies. © 2022 Elsevier Inc.
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Affiliation(s)
- Jeffrey D Sperry
- Department of Pharmacy, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin
| | - Anne E Rose
- Department of Pharmacy, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin
| | - Eliot Williams
- Department of Hematology, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin
| | - Matthew R Dierks
- Department of Pharmacy, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin
| | - Joshua Eric Medow
- Department of Neurosurgery, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin
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60
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Giannini EG, Lisman T. The international normalized ratio - Great for prediction of bleeding in patients taking vitamin K antagonists, useless for prediction of bleeding in patients with chronic liver disease. J Thromb Haemost 2022; 20:1565-1567. [PMID: 35754010 DOI: 10.1111/jth.15756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 05/07/2022] [Indexed: 11/26/2022]
Affiliation(s)
- Edoardo G Giannini
- Gastroenterology Unit, Department of Internal Medicine, University of Genoa, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Ton Lisman
- Surgical Research Laboratory and Section of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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61
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Martens K, McMurry HS, Koprowski S, Hum J, Haraga J, Jou JH, Shatzel JJ. Anticoagulation in Cirrhosis: Evidence for the Treatment of Portal Vein Thrombosis and Applications for Prophylactic Therapy. J Clin Gastroenterol 2022; 56:536-545. [PMID: 35537133 PMCID: PMC9189067 DOI: 10.1097/mcg.0000000000001713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The clinical utility of anticoagulation for patients with cirrhosis and asymptomatic portal vein thrombosis (PVT) is widely debated. Complex hemostatic derangements in cirrhosis that increase risk of both bleeding and thrombosis, as well as a lack of randomized controlled data, limit conclusive assessments regarding optimal management of anticoagulation in this setting. In this review, we summarize the relevant literature pertaining to PVT in cirrhosis, including the effect of untreated PVT on the natural progression of liver disease and the overall impact of anticoagulation on clot burden and other relevant clinical outcomes. Apart from patients who are symptomatic or listed for liver transplantation, data supporting anticoagulation for the treatment of PVT is limited and without clear consensus guidelines. In patients with cirrhosis without PVT, emerging evidence for the role of prophylactic anticoagulation to mitigate the progression of fibrosis suggests an optimal risk-benefit tradeoff with decreased rates of liver decompensation and mortality, without a heightened risk of bleeding. In summation, as our understanding of the role of both prophylactic and therapeutic anticoagulation in cirrhosis continues to evolve, ongoing risk stratification of patients with asymptomatic PVT demands further attention.
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Affiliation(s)
- Kylee Martens
- Division of Hematology-Oncology, Knight Cancer Institute, Oregon Health & Science University, Portland OR
| | | | - Steven Koprowski
- Division of Gastroenterology, Oregon Health & Science University, Portland OR
| | - Justine Hum
- Division of Gastroenterology, Oregon Health & Science University, Portland OR
| | - Jessica Haraga
- Division of Gastroenterology, University of California, Los Angeles, CA
| | - Janice H. Jou
- Division of Gastroenterology, Oregon Health & Science University, Portland OR
| | - Joseph J. Shatzel
- Division of Hematology-Oncology, Knight Cancer Institute, Oregon Health & Science University, Portland OR
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62
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Cecchini A, Othman A, Sanku K, Cecchini A, Pierce D. Small Bowel Perforation Secondary to Portal Vein Thrombosis. Cureus 2022; 14:e25911. [PMID: 35844306 PMCID: PMC9278985 DOI: 10.7759/cureus.25911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2022] [Indexed: 11/25/2022] Open
Abstract
Portal vein thrombosis (PVT) is a heterogeneous entity often described as either an acute or chronic occlusion of the portal vein or its tributaries. The clinical presentation is highly variable, and it often mimics other more common causes of abdominal pain. In most patients, imaging studies such as doppler ultrasound, computed tomography, or magnetic resonance imaging are adequate for diagnosis. Occasionally imaging studies may be inadequate, and the diagnosis may not be made until complications such as bowel necrosis and perforation have occurred. We present a case of a morbidly obese 45-year-old female who was initially treated for suspected small bowel enteritis and discharged home on several occasions after nonspecific findings on abdominal imaging were seen and interval improvement in symptoms occurred with intravenous fluids and antibiotics. She then presented with worsening symptoms and was found on abdominal imaging to have a large fluid collection in the peritoneal cavity requiring exploratory laparotomy with peritoneal washout and partial small bowel resection due to perforation. She was diagnosed with PVT with mesenteric extension after samples of the resected mesentery were evaluated in the pathology laboratory. Her treatment included a prolonged course of antibiotics, total parenteral nutrition, and anticoagulation.
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63
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Lisman T, Caldwell SH, Intagliata NM. Haemostatic alterations and management of haemostasis in patients with cirrhosis. J Hepatol 2022; 76:1291-1305. [PMID: 35589251 DOI: 10.1016/j.jhep.2021.11.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/31/2021] [Accepted: 11/02/2021] [Indexed: 12/12/2022]
Abstract
Patients with cirrhosis frequently acquire complex changes in their haemostatic system including a decreased platelet count and decreased levels of various haemostatic proteins. Although historically patients with cirrhosis were thought to have a haemostasis-related bleeding tendency, it is now widely accepted that the haemostatic system of patients with cirrhosis remains in balance as a result of simultaneous changes in pro- and anti-haemostatic systems. The concept of rebalanced haemostasis has led to changes in clinical management, although firm evidence from well-designed clinical studies is largely lacking. For example, many invasive procedures in patients with cirrhosis and a prolonged prothrombin time are now performed without prophylaxis with fresh frozen plasma. Conversely, clinicians have become more aware of the need for anti-thrombotic therapy, even in those patients with abnormal routine coagulation tests. This paper will outline recent advances in pathogenesis, prevention and treatment of both bleeding and thrombotic complications in patients with cirrhosis. Among other topics, we will discuss the haemostatic status of acutely ill patients with cirrhosis, the various causes of bleeding in patients with cirrhosis, and how best to prevent or treat bleeding. In addition, we will discuss the hypercoagulable features of patients with cirrhosis, new insights into the pathogenesis of portal vein thrombosis, and how best to prevent or treat thromboses.
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Affiliation(s)
- Ton Lisman
- Surgical Research Laboratory and Section of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
| | - Stephen H Caldwell
- Division of Gastroenterology and Hepatology, Department of Medicine, Center for Coagulation in Liver Disease, University of Virginia Medical Center, Charlottesville VA, United States
| | - Nicolas M Intagliata
- Division of Gastroenterology and Hepatology, Department of Medicine, Center for Coagulation in Liver Disease, University of Virginia Medical Center, Charlottesville VA, United States
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Evans CR, Cuker A, Crowther M, Pishko AM. Prophylactic fresh frozen plasma versus prothrombin complex concentrate for preprocedural management of the coagulopathy of liver disease: A systematic review. Res Pract Thromb Haemost 2022; 6:e12724. [PMID: 36204546 PMCID: PMC9124952 DOI: 10.1002/rth2.12724] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 03/19/2022] [Accepted: 04/04/2022] [Indexed: 11/23/2022] Open
Abstract
Background The optimal prophylactic preprocedural management of patients with coagulopathy due to liver disease is not known. Objectives Our objective was to compare the efficacy and safety of fresh frozen plasma (FFP) with prothrombin complex concentrate (PCC) in the preprocedural management of patients with coagulopathy of liver disease. Methods We conducted a systematic review to examine published evidence regarding treatment with FFP or PCC in adults with coagulopathy of liver disease undergoing an invasive procedure. Direct comparisons and single‐arm studies were eligible. Efficacy outcomes included major bleeding, mortality, and correction of prothrombin time (PT) and/or international normalized ratio (INR). Safety outcomes included thrombosis and transfusion‐related complications. Results A total of 95 articles were identified for full‐text review. Nine studies were eligible and included in the review. No randomized trials comparing FFP versus PCC were identified. Only two studies directly compared FFP versus PCC. In these studies, PCC appeared to result in higher rates of correction of PT/INR, but bleeding outcomes were not different. In the single‐arm studies, bleeding events appeared low overall. Volume overload was the most common recorded adverse event in patients receiving FFP. Thromboembolic events occurred rarely, but exclusively in the PCC group. Due to heterogeneity in study definitions and bias, meta‐analysis was not possible. Our study found no evidence to favor a specific product over another. Conclusions Insufficient data exist on the effects of FFP versus PCC administration before invasive procedures in patients with coagulopathy of liver disease to make conclusions with respect to relative efficacy or safety.
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Affiliation(s)
- Christina R. Evans
- Department of Medicine Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
| | - Adam Cuker
- Department of Medicine Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
- Department of Pathology and Laboratory Medicine Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
| | - Mark Crowther
- Department of Medicine McMaster University Hamilton Ontario Canada
| | - Allyson M. Pishko
- Department of Medicine Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
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Wang L, Guo X, Shao X, Xu X, Zheng K, Wang R, Chawla S, Basaranoglu M, Qi X. Association of endoscopic variceal treatment with portal venous system thrombosis in liver cirrhosis: a case-control study. Therap Adv Gastroenterol 2022; 15:17562848221087536. [PMID: 35574427 PMCID: PMC9102139 DOI: 10.1177/17562848221087536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/25/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The association of endoscopic variceal treatment (EVT) with portal venous system thrombosis (PVST) in liver cirrhosis is still unclear. METHODS PVST was assessed by contrast-enhanced CT or MRI in 406 cirrhotic patients from our prospective database. Case and control groups, which are defined as patients with and without PVST, respectively, were matched at a ratio of 1:1 according to age, gender, Child-Pugh class, and MELD score. History of EVT was reviewed. Logistic regression analysis was used to identify the risk factors for PVST. Odds ratios (ORs) were calculated. Subgroup analyses were further performed in terms of degree and location of PVST. RESULTS Overall, 109 patients each were included in case and control groups. The case group had a significantly higher proportion of patients who had undergone EVT than the control group (53.2% versus 18.3%; p < 0.001). In detail, the case group had significantly higher proportions of patients who had undergone EVT for controlling bleeding (45.9% versus 14.7%; p < 0.001), endoscopic variceal ligation (EVL) alone (19.3% versus 9.2%; p = 0.033), and EVL combined with endoscopic cyanoacrylate glue injection (24.8% versus 5.5%; p < 0.001). EVT was independently associated with PVST (OR = 4.258; p < 0.001). In subgroup analyses, EVT remained independently associated with partial PVST (OR = 10.063; p < 0.001), complete PVST/fibrotic cord (OR = 4.889; p = 0.008), thrombosis within main portal vein (OR = 5.985; p < 0.001), and thrombosis within superior mesenteric and splenic veins (OR = 5.747; p < 0.001). CONCLUSIONS EVT may lead to a higher risk of PVST, especially more severe PVST, in liver cirrhosis. Screening for and prophylaxis of PVST after EVT should be further explored.
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Affiliation(s)
| | | | | | - Xiangbo Xu
- Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command (formerly called General Hospital of Shenyang Military Area), Shenyang, China
| | - Kexin Zheng
- Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command (formerly called General Hospital of Shenyang Military Area), Shenyang, China
| | - Ran Wang
- Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command (formerly called General Hospital of Shenyang Military Area), Shenyang, China
| | - Saurabh Chawla
- Division of Digestive Diseases, Department of Internal Medicine, School of Medicine, Emory University, Atlanta, GA, USA
| | - Metin Basaranoglu
- Division of Gastroenterology, Department of Internal Medicine, Medical School, Bezmialem Vakif University, Istanbul, Turkey
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Rivaroxaban for the treatment of noncirrhotic splanchnic vein thrombosis: an interventional prospective cohort study. Blood Adv 2022; 6:3569-3578. [PMID: 35439303 PMCID: PMC9631568 DOI: 10.1182/bloodadvances.2022007397] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 04/05/2022] [Indexed: 11/20/2022] Open
Abstract
SVT is a potentially life-threatening disease associated with a substantial risk of recurrence and bleeding. Rivaroxaban appears to be a reasonable alternative to standard anticoagulation for the treatment of SVT in patients without cirrhosis.
Heparins and vitamin K antagonists are the mainstay of treatment of splanchnic vein thrombosis (SVT). Rivaroxaban is a potential alternative, but data to support its use are limited. We aimed to evaluate the safety and efficacy of rivaroxaban for the treatment of acute SVT. In an international, single-arm clinical trial, adult patients with a first episode of noncirrhotic, symptomatic, objectively diagnosed SVT received rivaroxaban 15 mg twice daily for 3 weeks, followed by 20 mg daily for an intended duration of 3 months. Patients with Budd-Chiari syndrome and those receiving full-dose anticoagulation for >7 days prior to enrollment were excluded. Primary outcome was major bleeding; secondary outcomes included death, recurrent SVT, and complete vein recanalization within 3 months. Patients were followed for a total of 6 months. A total of 103 patients were enrolled; 100 were eligible for the analysis. Mean age was 54.4 years; 64% were men. SVT risk factors included abdominal inflammation/infection (28%), solid cancer (9%), myeloproliferative neoplasms (9%), and hormonal therapy (9%); 43% of cases were unprovoked. JAK2 V617F mutation was detected in 26% of 50 tested patients. At 3 months, 2 patients (2.1%; 95% confidence interval, 0.6-7.2) had major bleeding events (both gastrointestinal). One (1.0%) patient died due to a non–SVT-related cause, 2 had recurrent SVT (2.1%). Complete recanalization was documented in 47.3% of patients. One additional major bleeding event and 1 recurrent SVT occurred at 6 months. Rivaroxaban appears as a potential alternative to standard anticoagulation for the treatment of SVT in non-cirrhotic patients. This trial was registered at www.clinicaltrials.gov as #NCT02627053 and at eudract.ema.europa.eu as #2014-005162-29-36.
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67
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Hibi T. Nontransplant options for portomesenteric thrombosis. Curr Opin Organ Transplant 2022; 27:144-147. [PMID: 35143434 DOI: 10.1097/mot.0000000000000964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW Portomesenteric thrombosis (PMT) is a serious condition encountered mainly in cirrhotic patients awaiting liver transplantation. More recently, this potentially fatal complication has been described after bariatric surgery and inflammatory bowel disease. Several consensus guidelines have been published over the past few years and this mini review was conducted to discuss updated nontransplant treatment options based on currently available evidence. RECENT FINDINGS Anticoagulation is the mainstay of treatment for PMT involving <50% of the main portal vein. Transjugular intrahepatic portosystemic shunt are usually preserved for patients with more extensive disease or those with clinically significant portal hypertension that are treatment refractory. SUMMARY The extent of PMT, response to therapy, and complications related with PMT are the determinants of therapy.
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Affiliation(s)
- Taizo Hibi
- Department of Pediatric Surgery and Transplantation, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
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68
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Wei B, Huang Z, Tang C. Optimal Treatment for Patients With Cavernous Transformation of the Portal Vein. Front Med (Lausanne) 2022; 9:853138. [PMID: 35402447 PMCID: PMC8987530 DOI: 10.3389/fmed.2022.853138] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 02/21/2022] [Indexed: 01/10/2023] Open
Abstract
Cavernous transformation of the portal vein (CTPV) is a sequela of extrahepatic and/or intrahepatic portal vein obstruction caused by a combination of local and risk factors. It was ever taken as a relatively rare disease due to its scant literature, which was mainly based on clinical series and case reports. CTPV often manifests as gastroesophageal variceal bleeding, splenomegaly, and portal biliopathy after the long-term insidious presentation. It is unable for CTPV to be recanalized with anticoagulation because it is a complete obstruction of the mesentericoportal axis. Endoscopic therapy is mainly used for temporary hemostasis in acute variceal bleeding. Meso-Rex shunting characterized by portal-flow-preserving shunts has been widely performed in children with CTPV. The multitude of complications associated with CTPV in adults can be effectively addressed by various interventional vascular therapies. With the ubiquity of radiological examinations, optimal treatment for patients with CTPV becomes important. Multivisceral transplantation, such as liver-small intestinal transplantation, may be lifesaving and should be considered for patients with diffuse mesenteric venous thrombosis.
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Affiliation(s)
- Bo Wei
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Zhiyin Huang
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Chengwei Tang
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, China
- *Correspondence: Chengwei Tang
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69
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Sissingh NJ, Groen JV, Koole D, Klok FA, Boekestijn B, Bollen TL, van Santvoort HC, Verdonk RC, Bonsing BA, van Eijck CHJ, van Hooft JE, Mieog JSD. Therapeutic anticoagulation for splanchnic vein thrombosis in acute pancreatitis: A systematic review and meta-analysis. Pancreatology 2022; 22:235-243. [PMID: 35012902 DOI: 10.1016/j.pan.2021.12.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/19/2021] [Accepted: 12/17/2021] [Indexed: 12/11/2022]
Abstract
OBJECTIVES The optimal management of patients with acute pancreatitis (AP) and splanchnic vein thrombosis (SVT) remains unknown. This systematic review and meta-analysis aimed to see if therapeutic anticoagulation (AC) improves outcomes in patients with AP and SVT. METHODS A systematic review was performed according to PRISMA guidelines. Main outcomes were recanalization, recurrent venous thromboembolism, development of varices, collaterals or cavernoma, haemorrhage and mortality. Meta-analysis were performed with the Mantel-Haenszel random effect models. RESULTS Seven retrospective cohort studies (3495 patients) were included. SVT occurred in 233 (7%) patients and involved most frequently the splenic vein (44%). Therapeutic AC was administered to 109 (47%) patients, most frequently to those with triple vessel thrombosis (72%) and least to those with isolated splenic vein (22%) or superior mesenteric vein thrombosis (0%). Most studies administered (low molecular weight) heparin followed by warfarin (duration ranged between 1.5 and 12 months). This meta-analysis showed an absolute risk difference of 9% (95% confidence interval [CI] = -11-28%) for recanalization, -3% (95% CI = -19-12%) for the development of varices, collaterals or cavernoma, 3% (95% CI = -6-12%) for haemorrhage and 2% (95% CI = -8-12%) for mortality. CONCLUSIONS Based on the currently available data, it remains unclear if therapeutic anticoagulation provides benefit to acute pancreatitis patients with splanchnic vein thrombosis. These results are based on low quality data underlining the need for further higher quality studies.
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Affiliation(s)
- Noor J Sissingh
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Research and Development, St. Antonius Hospital, Nieuwegein, the Netherlands.
| | - Jesse V Groen
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands
| | - Dylan Koole
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands
| | - Frederikus A Klok
- Thrombosis and Haemostasis, Leiden University Medical Center, Leiden, the Netherlands
| | - Bas Boekestijn
- Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands
| | - Thomas L Bollen
- Department of Radiology, St. Antonius Hospital, Nieuwegein, the Netherlands
| | - Hjalmar C van Santvoort
- Department of Surgery, St. Antonius Hospital, Nieuwegein, the Netherlands; Department of Surgery, University Medical Center, Utrecht, the Netherlands
| | - Robert C Verdonk
- Department of Gastroenterology and Hepatology, St. Antonius Hospital, Nieuwegein, the Netherlands
| | - Bert A Bonsing
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands
| | | | - Jeanin E van Hooft
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, the Netherlands
| | - J Sven D Mieog
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands.
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Interventional recanalization therapy in patients with non-cirrhotic, non-malignant portal vein thrombosis: comparison between transjugular versus transhepatic access. Abdom Radiol (NY) 2022; 47:1177-1186. [PMID: 35020007 PMCID: PMC8863683 DOI: 10.1007/s00261-022-03411-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/03/2022] [Accepted: 01/05/2022] [Indexed: 11/15/2022]
Abstract
Purpose To compare the safety and outcome of transjugular versus percutaneous technique in recanalization of non-cirrhotic, non-malignant portal vein thrombosis. Methods We present a retrospective bicentric analysis of 21 patients with non-cirrhotic, non-malignant PVT, who were treated between 2016 and 2021 by interventional recanalization via different access routes (percutaneous [PT] vs. transjugular in transhepatic portosystemic shunt [TIPS] technique). Complication rates with a focus on periprocedural bleeding and patency as well as outcome were compared. Results Of the 21 patients treated (median age 48 years, range of 19–78), seven (33%) patients had an underlying prothrombotic condition. While 14 (57%) patients were treated for acute PVT, seven (43%) patients had progressive thrombosis with known chronic PVT. Nine patients underwent initial recanalization via PT access and twelve via TIPS technique. There was no significant difference in complete technical success rate according to initial access route (55.5% in PT group vs. 83.3% in TIPS group, p = 0.331). However, creation of an actual TIPS was associated with higher technical success in restoring portal venous flow (86.6% vs. 33.3%, p = 0.030). 13 (61.9%) patients received thrombolysis. Nine (42.8%) patients experienced hemorrhagic complications. In a multivariate analysis, thrombolysis (p = 0.049) and PT access as the first procedure (p = 0.045) were significant risk factors for bleeding. Conclusion Invasive recanalization of the portal vein in patients with PVT and absence of cirrhosis and malignancy offers a good therapeutic option with high recanalization and patency rates. Bleeding complications result predominantly from a percutaneous access and high amounts of thrombolytics used; therefore, recanalization via TIPS technique should be favored.
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71
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Ageno W. Treatment of Atypical Clots. Hamostaseologie 2022; 42:10-18. [PMID: 35196729 DOI: 10.1055/a-1669-3336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
The term unusual site thrombosis refers to the occurrence of venous thromboembolism outside of the lower limbs and the pulmonary arteries. Unusual site thrombosis can virtually affect any venous segment, with the most common and/or clinically relevant sites including the upper limbs veins, the retinal veins, the splanchnic veins and the cerebral veins. Clinical features are obviously heterogeneous, while many predisposing factors are common, though with different prevalence among the various disorders. Antithrombotic therapy is prescribed to most patients, but the type, intensity, and duration of treatment vary both within and among patient groups. Increasing evidence is supporting the use of the direct oral anticoagulants in patients with upper limb deep vein thrombosis, cerebral vein thrombosis, and with splanchnic vein thrombosis. This article will review available evidence on the treatment of venous thrombosis occurring in unusual sites.
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Affiliation(s)
- Walter Ageno
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
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72
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Lawrence B, Siau K. Use of FFP to correct INR: time to drop this from the decompensated cirrhosis care bundle? Frontline Gastroenterol 2022; 13:456. [PMID: 36051953 PMCID: PMC9380763 DOI: 10.1136/flgastro-2022-102110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 01/31/2022] [Indexed: 02/04/2023] Open
Affiliation(s)
- Ben Lawrence
- Department of Gastroenterology, Royal Cornwall Hospitals NHS Trust, Truro, Cornwall, UK
| | - Keith Siau
- Department of Gastroenterology, Royal Cornwall Hospitals NHS Trust, Truro, Cornwall, UK
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73
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Luther J, Friedman LS. Management of Thrombocytopenia and Coagulopathy in Patients with Chronic Liver Disease Undergoing Therapeutic Endoscopic Interventions. Clin Liver Dis 2022; 26:1-12. [PMID: 34802655 DOI: 10.1016/j.cld.2021.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Management of coagulopathy in patients with advanced liver disease undergoing therapeutic endoscopic procedures is complex. Improvements in the understanding of hemostasis at a physiologic level have highlighted the inaccuracy of currently available clinical tests, like platelet count and prothrombin time, in estimating hemostasis in patients with cirrhosis. With identification of novel factors that contribute to bleeding risk in patients with cirrhosis, there is a dearth of clinical trial data that account for all potentially relevant factors and that examine interventions to reduce bleeding risk. Precise recommendations regarding transfusion strategies based on hemostatic test results in patients with cirrhosis are impractical.
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Affiliation(s)
- Jay Luther
- MGH Alcohol Liver Center, Boston, MA, USA; Division of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Blake 4, 55 Fruit Street, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Lawrence S Friedman
- Division of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Blake 4, 55 Fruit Street, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA; Department of Medicine, Newton-Wellesley Hospital, Newton, MA, USA; Department of Medicine, Tufts University School of Medicine, Boston, MA, USA.
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Abstract
In patients with cirrhosis and chronic liver disease, acute-on-chronic liver failure is emerging as a major cause of mortality. These guidelines indicate the preferred approach to the management of patients with acute-on-chronic liver failure and represent the official practice recommendations of the American College of Gastroenterology. The scientific evidence for these guidelines was evaluated using the Grading of Recommendations, Assessment, Development, and Evaluation process. In instances where the evidence was not appropriate for Grading of Recommendations, Assessment, Development, and Evaluation, but there was consensus of significant clinical merit, key concept statements were developed using expert consensus. These guidelines are meant to be broadly applicable and should be viewed as the preferred, but not only, approach to clinical scenarios.
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75
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Kuroiwa Y, Kusumoto K, Shimata K, Yamashita A, Hibi T, Asada Y, Imamura T. MRI diffusion-weighted imaging detects a fresh portal vein thrombus as a high intensity lesion in a patient with a liver transplant: A case report. Acta Radiol Open 2022; 10:20584601211069557. [PMID: 34992794 PMCID: PMC8725224 DOI: 10.1177/20584601211069557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 12/09/2021] [Indexed: 11/23/2022] Open
Abstract
Portal vein thrombosis is one of the most serious complications after liver
transplantation. It is important to determine the age of the thrombus for management of
portal vein thrombosis. We present a case report of histologically confirmed heterogenous
fresh portal vein thrombus which was depicted heterogenous high signal intensity on
magnetic resonance diffusion weighted imaging. The sequence may be a useful imaging tool
for detecting fresh thrombus components in the portal vein thrombosis.
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Affiliation(s)
- Yasuyoshi Kuroiwa
- Department of Radiological Technology,
Internal Medicine, Koga General Hospital, Miyazaki, Japan
- Department of Pathology, Faculty of
Medicine, University of Miyazaki, Miyazaki, Japan
| | | | - Keita Shimata
- Department of Pediatric Surgery and
Transplantation, Kumamoto University Graduate School of Medical
Sciences, Kumamoto, Japan
| | - Atsushi Yamashita
- Department of Pathology, Faculty of
Medicine, University of Miyazaki, Miyazaki, Japan
- Atsushi Yamashita, Department of Pathology, Faculty
of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan.
| | - Taizo Hibi
- Department of Pediatric Surgery and
Transplantation, Kumamoto University Graduate School of Medical
Sciences, Kumamoto, Japan
| | - Yujiro Asada
- Department of Pathology, Faculty of
Medicine, University of Miyazaki, Miyazaki, Japan
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Roberts LN, Lisman T, Stanworth S, Hernandez-Gea V, Magnusson M, Tripodi A, Thachil J. Periprocedural management of abnormal coagulation parameters and thrombocytopenia in patients with cirrhosis: Guidance from the SSC of the ISTH. J Thromb Haemost 2022; 20:39-47. [PMID: 34661370 DOI: 10.1111/jth.15562] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/05/2021] [Accepted: 10/11/2021] [Indexed: 12/12/2022]
Abstract
Prolonged prothrombin time and thrombocytopenia are common in patients with cirrhosis. These parameters do not reflect the overall hemostatic rebalance or bleeding risk in the periprocedural setting; however, attempts to correct these parameters remain frequent. We review the literature on periprocedural bleeding risk, bleeding risk factors, and the risk and benefits of hemostatic interventions in patients with cirrhosis. We provide guidance recommendations on evaluating bleeding risk in this patient group and management of hemostatic abnormalities in the periprocedural setting.
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Affiliation(s)
- Lara N Roberts
- King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital, London, UK
| | - Ton Lisman
- Surgical Research Laboratory and Section of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Simon Stanworth
- Transfusion Medicine, NHS Blood and Transplant, Oxford, UK
- Department of Haematology, Oxford University Hospitals, NHS Foundation Trust, Oxford, UK
- Radcliffe Department of Medicine, University of Oxford and NIHR Oxford Biomedical Research Centre (Haematology), Oxford, UK
| | - Virginia Hernandez-Gea
- Barcelona Hepatic Hemodynamic Laboratory, Liver Unit, Hospital Clínic, IDIBAPS, Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Health Care Provider of the European Reference Network on Rare Liver Disorders (ERN-Liver), University of Barcelona, Barcelona, Spain
| | - Maria Magnusson
- Department of Pediatrics, Clinical Chemistry and Blood Coagulation Research, MMK, CLINTEC, Karolinska Institutet, Stockholm, Sweden
- Department of Haematology, Karolinska University Hospital, Stockholm, Sweden
| | - Armando Tripodi
- IRCCS Ca' Granda Maggiore Hospital Foundation, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center and Fondazione Luigi Villa, Milano, Italy
| | - Jecko Thachil
- Department of Haematology, Manchester Royal Infirmary, Manchester, UK
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Zhang Z, Zhao Y, Han B, Zhu Z, Sun L, Cui X. The Efficacy and Safety of Anticoagulants in the Treatment of Cirrhotic Portal Vein Thrombosis: A Systematic Review and Meta-Analysis. Clin Appl Thromb Hemost 2022; 28:10760296221104797. [PMID: 35656719 PMCID: PMC9168872 DOI: 10.1177/10760296221104797] [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] [Indexed: 11/15/2022] Open
Abstract
Objective To evaluate the efficacy and safety of anticoagulant therapy in patients with
cirrhotic PVT, and compare differences in efficacy and safety among
different anticoagulants. Methods We comprehensively searched Pubmed, Cochrane Library, EMBASE, and
ClinicalTrials.gov from inception to April 2022 for studies using
anticoagulants for cirrhotic PVT. Meta-analysis was performed to calculate
odds ratios (ORs) with 95% confidence intervals (CIs). Results 3 RCTs and 14 cohort studies involving 1270 patients were included.
Anticoagulant therapy can increase the recanalization rate compared with
non-anticoagulation therapy (OR 4.44, 95% CI 3.11-6.32,
I2 = 2.5%) and can decrease the extension rate of cirrhotic PVT
(OR 0.33, 95% CI 0.18-0.62, I2 = 41.0%), without increasing the
incidence of total bleeding (OR 1.21, 95% CI 0.75-1.97,
I2 = 9.8%), major bleeding (OR 0.98, 95% CI 0.49-1.95,
I2 = 19.7%), and variceal bleeding (OR 0.35, 95% CI
0.12-1.01, I2 = 39.9%). Subgroup analysis showed that VKA, LMWH,
and DOACs could increase the recanalization rate of PVT and were not
associated with the risk of bleeding. Studies that compared direct oral
anticoagulants (DOACs) with warfarin directly showed that the recanalization
rate of PVT in the DOACs group might be higher than that in the warfarin
group (OR 30.99, 95% CI 7.39-129.87, I2 = 0.0%), and there was no
difference in the rate of total bleeding (OR 0.30, 95% CI 0.01-8.65,
I2 = 79.6%). Conclusions Anticoagulants are safe and effective in patients with cirrhotic PVT. The
rate of PVT recanalization associated with DOACs may be higher than
warfarin.
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Affiliation(s)
- Zhiqi Zhang
- Department of Pharmacy, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,College of Pharmacy, 26455Capital Medical University, Beijing, China
| | - Ying Zhao
- Department of Pharmacy, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Baofeng Han
- Department of Pharmacy, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,College of Pharmacy, 26455Capital Medical University, Beijing, China
| | - Zhijun Zhu
- Liver Transplantation Center, National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Liying Sun
- Liver Transplantation Center, National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiangli Cui
- Department of Pharmacy, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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78
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The American Journal of Gastroenterology in 2022 and Beyond: A Vision for "Our" Journal. Am J Gastroenterol 2022; 117:1-2. [PMID: 34904963 DOI: 10.14309/ajg.0000000000001579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 11/17/2021] [Indexed: 12/11/2022]
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Hwang J, Han YJ, Yon DK, Lee SW, Kim BK, Lee SB, Lee MH, Park SH, Koyanagi A, Jacob L, Tizaoui K, Kim SU, Shin JI, Smith L. Clinical significance of hepatosplenic thrombosis in vaccine-induced immune thrombotic thrombocytopenia after ChAdOx1 nCoV-19 vaccination. Int J Infect Dis 2021; 116:114-121. [PMID: 34958931 DOI: 10.1016/j.ijid.2021.12.352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 12/18/2021] [Accepted: 12/20/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Vaccine-induced immune thrombotic thrombocytopenia (VITT) is a rare, serious complication after adenoviral COVID-19 vaccine administration that can involve various organ systems. We aimed to investigate the clinical significance of hepatosplenic thrombosis in patients with VITT. METHODS We searched PubMed ePubs, Scopus, Embase, and Web of Science databases for studies published until April 28, 2021 involving patients with VITT after ChAdOx1 nCoV-19 vaccination. Demographic and clinical characteristics including laboratory measurements were collected and compared. RESULTS Four case series and three case reports involving 48 cases of VITT were included. Hepatosplenic thrombosis was present in eight cases (17%). Patients with hepatosplenic thrombosis had lower platelet counts (13,000 vs. 29,500/μL, p=0.016) and higher D-dimer levels (140.0 vs. 57.3 times upper limit of normal range, p=0.028). Multiple-site thrombosis was also associated with hepatosplenic thrombosis (88% vs. 15%, p<0.001). CONCLUSIONS This is the first study comparing clinical profiles of patients with VITT according to the presence of hepatosplenic thrombosis. Patients with hepatosplenic thrombosis had more severe presentations with lower platelet counts, higher D-dimer levels, and higher rate of multiple-site thromboses. Further studies with larger sample sizes are required to establish definitive evidence regarding the significance of hepatosplenic thrombosis in VITT.
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Affiliation(s)
- Jimin Hwang
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
| | - Young Joo Han
- Hospital medicine center, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - Dong Keon Yon
- Medical Science Research Institute, Kyung Hee University College of Medicine, Seoul, Republic of Korea; Department of Pediatrics, Kyung Hee University Medical Center, Kyung Hee University College of Medicine, Seoul, Republic of Korea
| | - Seung Won Lee
- Department of Data Science, Sejong University College of Software Convergence, Seoul, Republic of Korea; Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Beom Kyung Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Republic of Korea; Yonsei Liver Center, Severance Hospital, Seoul, Republic of Korea
| | - Se Bee Lee
- Ulsan University College of Medicine, Seoul, Republic of Korea
| | - Min Ho Lee
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Seung Hyun Park
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Ai Koyanagi
- Parc Sanitari Sant Joan de Deu/CIBERSAM, Universitat de Barcelona, Fundacio Sant Joan de Deu, Sant Boi de Llobregat, Barcelona, Spain; ICREA, Pg. Lluis Companys 23, Barcelona, Spain
| | - Louis Jacob
- Parc Sanitari Sant Joan de Deu/CIBERSAM, Universitat de Barcelona, Fundacio Sant Joan de Deu, Sant Boi de Llobregat, Barcelona, Spain; Faculty of Medicine, University of Versailles Saint-Quentin-en-Yvelines, Montigny-le-Bretonneux, France
| | - Kalthoum Tizaoui
- Department of Basic Sciences, Medicine Faculty of Tunis, Tunis El Manar University, Tunis, Tunisia
| | - Seung Up Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Republic of Korea; Yonsei Liver Center, Severance Hospital, Seoul, Republic of Korea.
| | - Jae Il Shin
- Department of Pediatrics, Yonsei University College of Medicine, Seoul, Republic of Korea.
| | - Lee Smith
- Centre for Health, Performance and Wellbeing, Anglia Ruskin University, Cambridge, UK
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Roberts LN. Rebalanced hemostasis in liver disease: a misunderstood coagulopathy. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2021; 2021:485-491. [PMID: 34889414 PMCID: PMC8791121 DOI: 10.1182/hematology.2021000283] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The combination of frequently abnormal hemostatic markers and catastrophic bleeding as seen with variceal hemorrhage has contributed to the longstanding misperception that chronic liver disease (CLD) constitutes a bleeding diathesis. Laboratory studies of hemostasis in liver disease consistently challenge this with global coagulation assays incorporating activation of the protein C pathway demonstrating rebalanced hemostasis. It is now recognized that bleeding in CLD is predominantly secondary to portal hypertension (rather than a coagulopathy) and additionally that these patients are at increased risk of venous thrombosis, particularly in the portal venous system. This narrative review describes the current understanding of hemostasis in liver disease, as well as the periprocedural management of hemostasis and anticoagulation for management of venous thromboembolism in patients with CLD.
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Affiliation(s)
- Lara N. Roberts
- Correspondence Lara N. Roberts, King's Thrombosis Centre, Department of Haematological Medicine, King's College Hospital NHS Foundation Trust, Denmark Hill, London SE5 9RS, UK; e-mail:
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81
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Long-term outcomes of individualized interventional treatment for primary Budd-Chiari syndrome complicated by inferior vena cava thrombosis. Eur J Gastroenterol Hepatol 2021; 33:e642-e649. [PMID: 34034280 DOI: 10.1097/meg.0000000000002191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Various endovascular treatments were used for Budd-Chiari syndrome (BCS) patients complicated by inferior vena cava (IVC) thrombosis. The best treatment for this disease remains unknown. To evaluate safety and efficacy of individualized interventional treatment for primary BCS with IVC thrombosis. METHODS Forty-seven consecutive patients with IVC involvement BCS complicated by IVC thrombosis between June 2002 and August 2020 were analyzed retrospectively. They were treated with individualized interventional treatment based on thrombus type and size. Agitation thrombolysis, transcatheter thrombus aspiration, and catheter-directed thrombolysis were initially used for fresh and mixed thrombus (n = 20), then stent implantation for compressing thrombus and IVC recanalization were performed according to the size of the residual thrombus. Direct balloon angioplasty was used for old thrombus (n = 27). RESULTS Median follow-up duration was 109 (5-223) months (average 114 ± 60 months). IVC recanalization were attempted in forty patients and failed in one. The technical successful rate of IVC recanalization was 97.5%. Thrombus was completely lysed in eight patients with fresh thrombus (40%, 8/20), partially lysed in 11 patients with mixed thrombus (55%, 11/20), and no response in one patient with mixed thrombus (5%, 1/20). Thrombolytic-related complications occurred in one patient (5%, 1/20). No symptomatic pulmonary embolism occurred. Among the 11 patients with thrombus partially lysed, five patients underwent stent implantation for compressing thrombus, six patients received conservative treatment. Old thrombus was completely lysed in 15 patients (55.6%, 15/27) during follow-up. Restenosis occurred in six patients (15.4%, 6/39). Primary patency rates at 1, 5, 10 and 15 years were 92, 92, 86 and 80%, respectively. Hepatocellular carcinoma (HCC) occurred in four patients (8.5%, 4/47). One patient died of HCC. The survival rate was 97.9%. CONCLUSIONS The individualized interventional treatment based on thrombus type and size for primary BCS complicated by IVC thrombosis patients is safe and effective with long-term patency and survival.
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Comparison of long-term outcomes of balloon angioplasty with or without stent placement for hepatic vein type Budd-Chiari syndrome. Eur J Gastroenterol Hepatol 2021; 33:e843-e850. [PMID: 34402468 DOI: 10.1097/meg.0000000000002277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
PURPOSE To compare percutaneous transluminal balloon angioplasty (PTBA) alone with PTBA plus stent placement for Budd-Chiari syndrome (BCS) patients with short-segmental obstruction of hepatic vein. METHODS Between May 2001 and December 2010, 91 hepatic vein type BCS patients (mean age, 32.8 ± 10.8; M:F ratio 50:41) were included and divided into two groups (PTBA alone, as group A, n = 48; PTBA plus stent, as group B, n = 43). The incidence of restenosis, long-term patency, and survival were evaluated. RESULTS All 91 patients were successfully treated with hepatic vein recanalization. During follow-up period (median 161 months, range: 84-234), group B had a significantly higher proportion of hepatic vein restenosis (56%, 24/43) than group A (33%, 16/48; P < 0.05). Cumulative primary patency rates at 1, 5, 10, 15 years were 96%, 81%, 69%, 65% and 91%, 60%, 47%, 47% in group A and group B, respectively (log-rank P < 0.05). Secondary technical success rates of target hepatic vein were 93% and 57% in group A and group B, respectively (P < 0.05). Clinical complete response rates were 94% and 86% in group A and group B, respectively (P > 0.05). The 15-year cumulative survival rates were 98% and 95% in group A and group B, respectively (P > 0.05). Major procedure-related complications occurred in 3 (3%) patients (1 in group A, 2 in group B). CONCLUSIONS Hepatic vein recanalization is safe and efficient for hepatic vein type BCS patients with hepatic vein short segmental obstruction. Restenosis after hepatic vein stenting is more common and difficult to manage than that after hepatic vein balloon angioplasty alone.
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83
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Vaccine-induced immune thrombotic thrombocytopenia. LANCET HAEMATOLOGY 2021; 9:e73-e80. [PMID: 34774202 PMCID: PMC8585488 DOI: 10.1016/s2352-3026(21)00306-9] [Citation(s) in RCA: 98] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/12/2021] [Accepted: 09/17/2021] [Indexed: 01/07/2023]
Abstract
In response to the COVID-19 pandemic, vaccines for SARS-CoV-2 were developed, tested, and introduced at a remarkable speed. Although the vaccine introduction had a major impact on the evolution of COVID-19, some potential rare side-effects of the vaccines were observed. Within a short period, three scientific groups from Norway, Germany, and the UK reported cerebral venous sinus thrombosis with thrombocytopenia and anti-platelet factor 4 (anti-PF4) antibodies in individuals following AstraZeneca–Oxford vaccination and named this new syndrome vaccine-induced immune thrombotic thrombocytopenia (VITT). This syndrome was subsequently reported in individuals who received Johnson & Johnson vaccination. In this Viewpoint, we discuss the epidemiology, pathophysiology, and optimal diagnostic and therapeutic management of VITT. Presentation of an individual with possible VITT should raise prompt testing for anti-PF4 antibodies and initiation of treatment targeting autoimmune processes with intravenous immunoglobulin and prothrombotic processes with non-heparin anticoagulation.
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84
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Riva N, Attard LM, Vella K, Squizzato A, Gatt A, Calleja-Agius J. Diagnostic accuracy of D-dimer in patients at high-risk for splanchnic vein thrombosis: A systematic review and meta-analysis. Thromb Res 2021; 207:102-112. [PMID: 34600286 DOI: 10.1016/j.thromres.2021.09.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/21/2021] [Accepted: 09/23/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND D-dimer is included in the diagnostic algorithm for deep vein thrombosis and pulmonary embolism. However, its role in the diagnosis of splanchnic vein thrombosis (SVT) is still controversial. The aim of this study was to evaluate the diagnostic accuracy of D-dimer for SVT. METHODS We performed a systematic review of the literature with meta-analysis (PROSPERO protocol registration number: CRD42020184300). The electronic databases MEDLINE, EMBASE, and CENTRAL were searched from inception to March 2021 week 4. Studies which evaluated D-dimer accuracy for SVT in any category of patients were selected. The index test was any D-dimer assay; the reference standard was any radiological imaging. The QUADAS-2 checklist was used for the risk of bias assessment. A bivariate random-effects regression model was used to calculate summary estimates of sensitivity and specificity. RESULTS 12 studies (with a total of 1298 patients) evaluating the accuracy of D-dimer in patients at high risk of SVT (surgical patients, patients with liver cirrhosis or hepatocellular carcinoma) were included. None of the included studies was at low risk of bias. The weighted mean prevalence of SVT was 33.4% (95% CI, 22.5-45.2%, I2 = 94.8%). D-dimer accuracy was expressed by sensitivity 96% (95% CI, 72-100%); specificity 25% (95% CI, 5-67%); positive likelihood ratio 1.3 (95% CI, 0.9-1.9); negative likelihood ratio 0.16 (95% CI, 0.03-0.84); area under the ROC curve 0.80 (95% CI, 0.76-0.83). CONCLUSIONS D-dimer seems to have high sensitivity in the diagnosis of patients at high-risk for SVT. However, there is a strong need for more robust evidence on this topic.
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Affiliation(s)
- Nicoletta Riva
- Department of Pathology, Faculty of Medicine and Surgery, University of Malta, Msida, Malta.
| | - Laura Maria Attard
- Department of Anatomy, Faculty of Medicine and Surgery, University of Malta, Msida, Malta.
| | - Kevin Vella
- Coagulation Medicine Laboratory, Department of Pathology, Mater Dei Hospital, Msida, Malta.
| | | | - Alex Gatt
- Department of Pathology, Faculty of Medicine and Surgery, University of Malta, Msida, Malta; Coagulation Medicine Laboratory, Department of Pathology, Mater Dei Hospital, Msida, Malta.
| | - Jean Calleja-Agius
- Department of Anatomy, Faculty of Medicine and Surgery, University of Malta, Msida, Malta.
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85
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Bos I, Blondeau M, Wouters D, Camus C, Houssel-Debry P, van der Plas WS, Nieuwenhuis LM, Bardou-Jacquet E, Lisman T, de Meijer VE, Porte RJ, Rayar M. Therapeutic anticoagulation after liver transplantation is not useful among patients with pre-transplant Yerdel-grade I/II portal vein thrombosis: A two-center retrospective study. J Thromb Haemost 2021; 19:2760-2771. [PMID: 34297481 DOI: 10.1111/jth.15472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 07/14/2021] [Accepted: 07/21/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Portal vein thrombosis (PVT) is no longer a contraindication for liver transplantation (LT). While therapeutic anticoagulation (tAC) is recommended during the waiting period, there is no evidence for its usefulness in the prevention of PVT recurrence after LT. OBJECTIVES The aim of our study was to evaluate the role of tAC post-LT in the prevention of PVT recurrence. PATIENTS/METHODS All adult LTs performed in two high-volume centers between 2003 and 2018 were retrospectively analysed. Only patients with PVT classified as Yerdel grade I or II and with standard portal reconstruction were included. PVT recurrence and tAC-associated morbidity within 1 year were compared between patients receiving tAC or not. RESULTS During the study period, of 2612 LTs performed, 235 (9%) patients with PVT were included; 113 patients (48.1%) received post-LT tAC (tAC group) while 122 (51.9%) did not (non-tAC group). The incidence of bleeding events was significantly higher in the tAC group (26 [23%] vs. 5 [4.1%], P < .01) and the initial hospitalization duration was longer (21 vs. 17.5 days, P < .01). Within the first year, PVT recurrence was observed for 9 (3.8%) patients without any difference between the tAC and non-tAC groups (6 [5.1%] vs. 3 [2.5%], P = .39). The only identified risk factor for PVT recurrence was the recipients' age (odds ratio= 0.94, P = .03). Graft (P = .11) and patient (P = .44) survival were similar between the two groups. CONCLUSION Therapeutic anticoagulation is not necessary in the prevention of grade I/II PVT recurrence and is associated with higher morbidity and longer hospital stay.
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Affiliation(s)
- Isabel Bos
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
- Surgical Research Laboratory, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Marc Blondeau
- Service de Chirurgie Hépatobiliaire et Digestive, CHU Rennes, Rennes, France
| | - Dune Wouters
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
- Surgical Research Laboratory, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Christophe Camus
- Service de Maladies Infectieuses et Réanimation Médicale, CHU Rennes, Rennes, France
- INSERM, Rennes, France
| | | | - Willemijn S van der Plas
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
- Surgical Research Laboratory, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Lianne M Nieuwenhuis
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
- Surgical Research Laboratory, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | | | - Ton Lisman
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
- Surgical Research Laboratory, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Vincent E de Meijer
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
- Surgical Research Laboratory, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Robert J Porte
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
- Surgical Research Laboratory, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Michel Rayar
- Service de Chirurgie Hépatobiliaire et Digestive, CHU Rennes, Rennes, France
- INSERM, Rennes, France
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86
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Kalbitz S, Ermisch J, Schmidt JM, Wallstabe I, Lübbert C. Unhappy Triad: Infection with Leptospira spp. Escherichia coli and Bacteroides uniformis Associated with an Unusual Manifestation of Portal Vein Thrombosis. Case Rep Gastroenterol 2021; 15:598-602. [PMID: 34616262 PMCID: PMC8454222 DOI: 10.1159/000517094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 05/03/2021] [Indexed: 01/11/2023] Open
Abstract
Portal vein thrombosis (PVT) is a rare disease with an incidence of 0.7/100,000 inhabitants per year. Septic PVT (pylephlebitis) usually occurs secondary to infection in the anatomic region drained by the portal venous system. We report on a 76-year-old German male who was admitted with a history of recurrent fever and acute renal failure. Blood cultures taken on admission showed Escherichia coli, as well as Bacteroides uniformis after an extended incubation period of 90 h. In addition, infection with Leptospira spp. was diagnosed serologically. Computerized tomography of the abdomen revealed an extensive PVT along with signs of colonic diverticulitis. Symptoms resolved under prolonged antimicrobial therapy with beta-lactams and adequate heparinization. A myeloproliferative disorder could be excluded. There was no evidence of an underlying coagulation disorder. Imaging controls showed an almost complete resolution of the PVT after 6 months of anticoagulation therapy. To the best of our knowledge, this is the first report of such an “unhappy triad,” which includes atypical manifestations of leptospirosis and involvement of other intestinal bacteria.
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Affiliation(s)
- Sven Kalbitz
- Department of Infectious Diseases, Tropical Medicine, Nephrology and Rheumatology, St. Georg Hospital, Leipzig, Germany
| | - Jörg Ermisch
- Department of Infectious Diseases, Tropical Medicine, Nephrology and Rheumatology, St. Georg Hospital, Leipzig, Germany
| | - Jonathan M Schmidt
- Department of Infectious Diseases, Tropical Medicine, Nephrology and Rheumatology, St. Georg Hospital, Leipzig, Germany.,Department of Gastroenterology, Hepatology, Diabetology and Endocrinology, St. Georg Hospital, Leipzig, Germany
| | - Ingo Wallstabe
- Department of Gastroenterology, Hepatology, Diabetology and Endocrinology, St. Georg Hospital, Leipzig, Germany
| | - Christoph Lübbert
- Department of Infectious Diseases, Tropical Medicine, Nephrology and Rheumatology, St. Georg Hospital, Leipzig, Germany.,Division of Infectious Diseases and Tropical Medicine, Leipzig University Hospital, Leipzig, Germany.,Interdisciplinary Center for Infectious Diseases, Leipzig University Hospital, Leipzig, Germany
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87
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Xu S, Guo X, Yang B, Romeiro FG, Primignani M, Méndez-Sánchez N, Yoshida EM, Mancuso A, Tacke F, Noronha Ferreira C, De Stefano V, Qi X. Evolution of Nonmalignant Portal Vein Thrombosis in Liver Cirrhosis: A Pictorial Review. Clin Transl Gastroenterol 2021; 12:e00409. [PMID: 34597281 PMCID: PMC8483868 DOI: 10.14309/ctg.0000000000000409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 08/22/2021] [Indexed: 02/07/2023] Open
Abstract
Portal vein thrombosis (PVT) is a common complication in liver cirrhosis, especially in advanced cirrhosis. It may be related to a higher risk of liver-related events and liver function deterioration. Imaging examinations can not only provide an accurate diagnosis of PVT, such as the extent of thrombus involvement and the degree of lumen occupied, but also identify the nature of thrombus (i.e., benign/malignant and acute/chronic). Evolution of PVT, mainly including development, recanalization, progression, stability, and recurrence, could also be assessed based on the imaging examinations. This article briefly reviews the pathophysiology, diagnosis, classification, and evolution of PVT with an emphasis on their computed tomography imaging features.
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Affiliation(s)
- Shixue Xu
- Liver Cirrhosis Study Group, Department of Gastroenterology, The General Hospital of Northern Theater Command (formerly General Hospital of Shenyang Military Area), Shenyang, China
- Graduate School, China Medical University, Shenyang, China
| | - Xiaozhong Guo
- Liver Cirrhosis Study Group, Department of Gastroenterology, The General Hospital of Northern Theater Command (formerly General Hospital of Shenyang Military Area), Shenyang, China
| | - Benqiang Yang
- Department of Radiology, The General Hospital of Northern Theater Command, Shenyang, China
| | - Fernando Gomes Romeiro
- Department of Internal Medicine, Botucatu Medical School, UNESP-Univ Estadual Paulista. Av. Prof. Mário Rubens Guimarães Montenegro, s/n Distrito de Rubião Jr, Botucatu, Brazil
| | - Massimo Primignani
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Division of Gastroenterology and Hepatology, Milan, Italy
| | - Nahum Méndez-Sánchez
- Liver Research Unit, Medica Sur Clinic and Foundation and Faculty of Medicine. National Autonomous University of Mexico, Mexico City, Mexico
| | - Eric M. Yoshida
- Division of Gastroenterology, University of British Columbia and Vancouver General Hospital, Vancouver, Canada
| | - Andrea Mancuso
- Medicina Interna 1, Azienda di Rilievo Nazionale ad Alta Specializzazione Civico, Di Cristina-Benfratelli, Palermo, Italy
| | - Frank Tacke
- Department of Hepatology and Gastroenterology, Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum and Campus Charité Mitte, Berlin, Germany
| | - Carlos Noronha Ferreira
- Serviço de Gastrenterologia e Hepatologia, Hospital de Santa Maria-Centro Hospitalar Universitário Lisboa Norte, Lisboa, Portugal
| | - Valerio De Stefano
- Dipartimento Di Diagnostica Per Immagini, Radioterapia Oncologica Ed Ematologia, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Roma, Italy
| | - Xingshun Qi
- Liver Cirrhosis Study Group, Department of Gastroenterology, The General Hospital of Northern Theater Command (formerly General Hospital of Shenyang Military Area), Shenyang, China
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88
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Bridwell RE, Clerkin S, Walker NR, Long B, Goss S. Portal Venous Thrombosis in a Special Operations Paratrooper: A Case Report. Mil Med 2021; 187:256-258. [PMID: 34591088 DOI: 10.1093/milmed/usab387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 08/17/2021] [Accepted: 09/09/2021] [Indexed: 11/14/2022] Open
Abstract
Portal vein thrombosis is the thrombotic occlusion of the extrahepatic portal system, which can propagate towards the vena caval system. Although rare, it occurs primarily in those with cirrhosis, intra-abdominal infections, malignancy, or hypercoagulable disorders. This report describes the first reported case of a soldier within special operations without identifiable risk factors who was found to have a completely occlusive portal vein thrombosis after approximately 10 days of insidious abdominal pain. This case emphasizes the importance of considering this rare but dangerous pathology among this highly screened and capable special operations population.
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Affiliation(s)
- Rachel E Bridwell
- United States Army Special Operations Aviation Command, Fort Bragg, NC 28310, USA
| | - Sean Clerkin
- United States Army Special Operations Aviation Command, Fort Bragg, NC 28310, USA
| | - Nathaniel R Walker
- United States Army Special Operations Aviation Command, Fort Bragg, NC 28310, USA
| | - Brit Long
- Department of Emergency Medicine, San Antonio Uniformed Services Health Education Consortium, Fort Sam Houston, TX 78234, USA
| | - Sarah Goss
- Department of Emergency Medicine, San Antonio Uniformed Services Health Education Consortium, Fort Sam Houston, TX 78234, USA
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89
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Dong S, Qi H, Li Y, Men P, Alifu M, Zhang Y, Li Y, Zhao R. A systematic review and meta-analysis of anticoagulation therapy for portal vein thrombosis in patients with cirrhosis: to treat or not to treat? Hepatol Int 2021; 15:1356-1375. [PMID: 34487316 DOI: 10.1007/s12072-021-10233-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 07/01/2021] [Indexed: 01/01/2023]
Abstract
PURPOSE To date, the optimal treatment for portal vein thrombosis (PVT) in cirrhotic patients has not been established in guidelines or consensus. We conducted a systematic review and meta-analysis to evaluate the effect of anticoagulation therapy in patients with cirrhosis and PVT. METHODS PubMed, Embase, the Cochrane Central Register of Controlled Trials, and ClinicalTrials.gov were searched (until 31st October 2020) for studies evaluating the effect of anticoagulation therapy on treating PVT in patients with cirrhosis. Odds ratios (ORs) and their 95% confidence intervals (CIs) were pooled using the Mantel-Haenszel method. RESULTS A total of 13 studies were included in the analysis, comprising 6005 patients. Of these, three were prospective cohort studies, nine were retrospective cohort studies and one was case-control study. Compared to no treatment, anticoagulation therapy was associated with higher rates of PVT recanalization (OR 4.29; 95% CI 3.01-6.13). Anticoagulation therapy demonstrated a significant 74% reduction in PVT extension compared to no treatment (OR 0.26; 95% CI 0.14-0.49). Anticoagulation therapy was associated with a nonsignificantly lower risk of death (OR 0.53; 95% CI 0.20-1.40). However, anticoagulation therapy was associated with slightly higher risk of bleeding compared to no treatment (OR 1.16; 95% CI 1.02-1.32). CONCLUSIONS In cirrhotic patients with PVT, anticoagulation therapy helps increase rate of PVT recanalization and improve survival, but may also carry higher risks of bleeding compared to no treatment. Our findings support the use of anticoagulation in cirrhotic patients with PVT.
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Affiliation(s)
- Shujie Dong
- Department of Pharmacy, Peking University Third Hospital, No.49 Huayuan North Road, Beijing, 100191, China
| | - Huihong Qi
- Department of Pharmacy, Tangshan Gongren Hospital, Tangshan, Hebei, China
| | - Yan Li
- Department of Pharmaceutical Outcomes and Policy, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - Peng Men
- Department of Pharmacy, Peking University Third Hospital, No.49 Huayuan North Road, Beijing, 100191, China
| | - Maiwujudan Alifu
- Department of Pharmacy, The Sixth Affiliated Hospital of Xinjiang Medical University, Ürümqi, China
| | - Yatong Zhang
- Department of Pharmacy, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Yongjun Li
- Department of Vascular Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, No.1 Dahua Road, Beijing, 100730, China.
| | - Rongsheng Zhao
- Department of Pharmacy, Peking University Third Hospital, No.49 Huayuan North Road, Beijing, 100191, China.
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90
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Gupta S, Hidalgo J, Singh B, Iyer A, Yang Y, Short A, Singh S, Bhatt H, Gupta S. Usage of Direct Acting Oral Anticoagulants in Cirrhotic and Non-Cirrhotic Portal Vein Thrombosis: A Systematic Review. Cureus 2021; 13:e16922. [PMID: 34367844 PMCID: PMC8342267 DOI: 10.7759/cureus.16922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/05/2021] [Indexed: 12/15/2022] Open
Abstract
Thrombosis of the portal vein (PVT) is generally seen in the setting of liver cirrhosis and to a lesser extent in the absence of cirrhosis. There is no clear guidance in relation to approaching treatment with anticoagulation in this condition. The professional societies and guidelines recommend treatment with traditional anticoagulation like low-molecular-weight heparin and vitamin-K antagonists in patients presenting with acute portal vein thrombosis. There is no clarity in relation to treatment in the setting of chronic PVT and in patients with cirrhosis. Also, the role of direct-acting oral anticoagulants (DOACs) that are becoming a preferred choice for anticoagulation for various other indications is not clear in the case of PVT. There are a very few studies in the medical literature that have investigated the role of DOACs in patients with PVT in different settings. Thus, we performed a systematic review of the literature to study the use of DOACs in PVT in patients with and without cirrhosis. The results of the available studies show that DOACS appears to be a promising choice for the treatment of patients with PVT. The availability of more data in the future along with better availability of the approved reversal agents for various DOACs is expected to make DOACS a preferred choice for the clinicians to treat patients with PVT.
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Affiliation(s)
- Sachin Gupta
- Hospital Medicine, Tower Health Reading Hospital, West Reading, USA
| | - Jessica Hidalgo
- Internal Medicine, San Francisco de Quito University, Quito, ECU
| | - Balraj Singh
- Hematology/Oncology, Saint Joseph's University Medical Center, Paterson, USA
| | - Aditya Iyer
- Internal Medicine, Washington Hospital Center, Washington DC, USA
| | - Yang Yang
- Internal Medicine, Thomas Jefferson University Hospital, Philadelphia, USA
| | - Alexandra Short
- Library Services, Tower Health Reading Hospital, West Reading, USA
| | - Sandeep Singh
- Internal Medicine, Indiana University School of Medicine, South Bend, USA
| | - Harshil Bhatt
- Internal Medicine, Indiana University School of Medicine, South Bend, USA.,Internal Medicine, Goshen Hospital, Goshen, USA
| | - Sorab Gupta
- Oncology, Bronx Care Health System, New York, USA
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91
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Senzolo M, Garcia-Tsao G, García-Pagán JC. Current knowledge and management of portal vein thrombosis in cirrhosis. J Hepatol 2021; 75:442-453. [PMID: 33930474 DOI: 10.1016/j.jhep.2021.04.029] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 04/20/2021] [Accepted: 04/20/2021] [Indexed: 12/13/2022]
Abstract
Portal vein thrombosis (PVT) is an increasingly recognised complication of cirrhosis whose incidence increases in parallel with the severity of cirrhosis. Several risk factors have been associated with the occurrence and progression of PVT. Although the negative effect of complete PVT on the surgical outcome of liver transplant recipients is clear, its impact on cirrhosis progression remains uncertain. Treatment options include anticoagulants and interventional thrombolytic therapies, which are chosen almost on a case-by-case basis depending on the characteristics of the patient and the thrombus. In this manuscript, we review current knowledge regarding the epidemiology, risk factors, diagnosis and classification, natural history, clinical consequences and treatment of non-neoplastic PVT in cirrhosis.
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Affiliation(s)
- Marco Senzolo
- Multivisceral Transplant Unit-Gastroenterology, Department of Surgery, Oncology and Gastroenterology, Padua University Hospital, Padua, Italy(†).
| | - Guadalupe Garcia-Tsao
- Section of Digestive Diseases, VA-Connecticut Healthcare System, West Haven, CT, USA; Section of Digestive Diseases, Yale University School of Medicine, New Haven, CT, USA
| | - Juan Carlos García-Pagán
- Barcelona Hepatic Hemodynamic Laboratory, Liver Unit, Hospital Clínic, Barcelona, Spain; Institut de Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Spain; CIBEREHD (Centro de Investigación Biomédica en Red Enfermedades Hepáticas y Digestivas), Spain(†)
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92
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Anticoagulation and Transjugular Intrahepatic Portosystemic Shunt for the Management of Portal Vein Thrombosis in Cirrhosis: A Prospective Observational Study. Am J Gastroenterol 2021; 116:1447-1464. [PMID: 33630766 DOI: 10.14309/ajg.0000000000001194] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Accepted: 01/22/2021] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Current guidelines recommend anticoagulation as the mainstay of portal vein thrombosis (PVT) treatment in cirrhosis. However, because of the heterogeneity of PVT, anticoagulation alone does not always achieve satisfactory results. This study aimed to prospectively evaluate an individualized management algorithm using a wait-and-see strategy (i.e., no treatment), anticoagulation, and transjugular intrahepatic portosystemic shunt (TIPS) to treat PVT in cirrhosis. METHODS Between February 2014 and June 2018, 396 consecutive patients with cirrhosis with nonmalignant PVT were prospectively included in a tertiary care center, of which 48 patients (12.1%) were untreated, 63 patients (15.9%) underwent anticoagulation, 88 patients (22.2%) underwent TIPS, and 197 patients (49.8%) received TIPS plus post-TIPS anticoagulation. The decision of treatment option mainly depends on the stage of liver disease (symptomatic portal hypertension or not) and degree and extension of thrombus. RESULTS During a median 31.7 months of follow-up period, 312 patients (81.3%) achieved partial (n = 25) or complete (n = 287) recanalization, with 9 (3.1%) having rethrombosis, 64 patients (16.2%) developed major bleeding (anticoagulation-related bleeding in 7 [1.8%]), 88 patients (22.2%) developed overt hepatic encephalopathy, and 100 patients (25.3%) died. In multivariate competing risk regression models, TIPS and anticoagulation were associated with a higher probability of recanalization. Long-term anticoagulation using enoxaparin or rivaroxaban rather than warfarin was associated with a decreased risk of rethrombosis and an improved survival, without increasing the risk of bleeding. However, the presence of complete superior mesenteric vein thrombosis was associated with a lower recanalization rate, increased risk of major bleeding, and poor prognosis. DISCUSSION In patients with cirrhosis with PVT, the individualized treatment algorithm achieves a high-probability recanalization, with low rates of portal hypertensive complications and adverse events.
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93
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Alukal JJ, Zhang T, Thuluvath PJ. Mortality and health care burden of Budd Chiari syndrome in the United States: A nationwide analysis (1998-2017). World J Hepatol 2021; 13:686-698. [PMID: 34239703 PMCID: PMC8239494 DOI: 10.4254/wjh.v13.i6.686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/27/2021] [Accepted: 05/20/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The Budd Chiari syndrome (BCS) is a rare and potentially fatal disease, but there is a paucity of data on the in- hospital mortality as well its economic burden on the health care system.
AIM To evaluate trends in mortality, length of hospital stays and resource utilization among inpatients with BCS.
METHODS Data on all adult patients with a diagnosis of BCS were extracted from the National Inpatient Sample (NIS) from 1998 to 2017. To make inferences regarding the national estimates for the total number of BCS discharges across the study period, sample weights were applied to each admission per recommendations from the NIS.
RESULTS During the study period, there were 3591 (8.73%) in-patient deaths. The overall in-hospital mortality rates among BCS patients decreased from 18% in 1998 to 8% in 2017; the mortality decreased by 4.41% (P < 0.0001) every year. On multivariate analysis, older age, higher comorbidity score, acute liver failure, acute kidney injury, acute respiratory failure, hepatic encephalopathy, hepatorenal syndrome, inferior vena cava thrombosis, intestinal infarct, sepsis/septic shock and cancer were associated increased risk of mortality. The average of length of stay was 8.8 d and it consistently decreased by 2.04% (95%CI: -2.67%, -1.41%, P < 0.001) from 12.7 d in 1998 to 7.6 d in 2017.The average total charges after adjusted for Medical Care Consumers Price Index to 2017 dollars during the time period was $94440 and the annual percentage change increased by 1.15% (95%CI: 0.35%, 1.96%, P = 0.005) from $95515 in 1998 to $103850 in 2017.
CONCLUSION The in-hospital mortality rate for patients admitted with BCS in the United States has reduced between 1998 and 2017 and this may a reflection of better management of these patients.
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Affiliation(s)
- Joseph J Alukal
- Institute of Digestive Health and Liver Diseases, Mercy Medical Center, Baltimore, MD 21202, United States
| | - Talan Zhang
- Institute of Digestive Health and Liver Diseases, Mercy Medical Center, Baltimore, MD 21202, United States
| | - Paul Joseph Thuluvath
- Institute of Digestive Health and Liver Diseases, Mercy Medical Center, Baltimore, MD 21202, United States
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21202, United States
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94
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Ballantine A, Martin D, Thakrar SV. The coagulopathy of liver disease: a shift in thinking. Br J Hosp Med (Lond) 2021; 82:1-9. [PMID: 34191571 DOI: 10.12968/hmed.2021.0111] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The coagulopathy of chronic liver disease causes derangement of the results of traditional laboratory tests. As such, there is an expectation that when undergoing invasive procedures patients with cirrhosis are at increased risk of bleeding. Standard practice is to optimise laboratory values with prophylactic transfusions of platelets, plasma and fibrinogen to reduce perceived bleeding risk. There has been a shift in thinking regarding coagulation in patients with chronic liver disease, whereby a rebalancing of haemostasis occurs with reduction in both procoagulants and anticoagulants. Guidelines for the preprocedural management of patients with chronic liver disease are inconsistent and may not account for this new paradigm. The risk of prophylactic transfusion should be measured against the risk of bleeding while considering the rebalancing of haemostasis. Future management may be guided by whole blood viscoelastic tests or use of thrombopoietin receptor agonists to optimise patients in these scenarios.
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Affiliation(s)
| | - Daniel Martin
- Peninsula Medical School, University of Plymouth, Plymouth, UK.,Department of Intensive Care Medicine, Derriford Hospital, Plymouth, UK
| | - Sonali V Thakrar
- Department of Anaesthesia, Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, UK
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95
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Giannini EG, Kano T, Ochiai T, Bentley R, Shrestha P, Afdhal N. Bleeding events in lusutrombopag-treated thrombocytopenic patients. Eur J Clin Invest 2021; 51:e13503. [PMID: 33523482 PMCID: PMC8243945 DOI: 10.1111/eci.13503] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 01/22/2021] [Accepted: 01/26/2021] [Indexed: 12/12/2022]
Affiliation(s)
- Edoardo Giovanni Giannini
- Gastroenterology Unit, Department of Internal Medicine, University of Genoa, IRCCS-Ospedale Policlinico San Martino, Genoa, Italy
| | - Takeshi Kano
- Global Project Management Department, Shionogi & Co., Ltd., Osaka, Japan
| | | | - Roy Bentley
- US Global Market Access, Shionogi Inc., Florham Park, NJ, USA
| | - Pomy Shrestha
- Product Safety and Pharmacovigilance, Shionogi Inc., Florham Park, NJ, USA
| | - Nezam Afdhal
- Liver Center, Beth Israel Deaconess Medical Center, Boston, MA, USA
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96
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Alukal JJ, Zhang T, Thuluvath PJ. Outcomes of status 1 liver transplantation for Budd-Chiari Syndrome with fulminant hepatic failure. Am J Transplant 2021; 21:2211-2219. [PMID: 33236517 DOI: 10.1111/ajt.16410] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 10/22/2020] [Accepted: 11/10/2020] [Indexed: 01/25/2023]
Abstract
There is a paucity of data on the outcome of liver transplantation (LT) in Budd-Chiari Syndrome (BCS) patients who are listed as status 1. The objective of our study was to determine patient or graft survival following LT in status 1 BCS patients. We utilized United Network for Organ Sharing (UNOS) database to identify all adult patients (> 18 years of age) listed as status 1 with a primary diagnosis of BCS in the United States from 1998 to 2018, and analyzed their outcomes and compared it to non-status 1 BCS patients. Four hundred and forty-six patients with BCS underwent LT between 1998 and 2018, and of these 55 (12.3%) were listed as status 1. There was no difference in long-term post-liver transplant or "intention-to-treat" survival from the time of listing to death or the last day of follow-up between status 1 and non-status 1 groups. Graft and patient survival at 5 years for status 1 patients were 75% and 82%, respectively. Cox regression analysis showed that patients listed as status 1 (aHR: 0.45, p < .02) were associated with a better survival. BCS patients listed as status 1 have excellent survival following emergency LT.
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Affiliation(s)
- Joseph J Alukal
- Institute of Digestive Health & Liver Diseases, Mercy Medical Center, Baltimore, Maryland, USA
| | - Talan Zhang
- Institute of Digestive Health & Liver Diseases, Mercy Medical Center, Baltimore, Maryland, USA
| | - Paul J Thuluvath
- Institute of Digestive Health & Liver Diseases, Mercy Medical Center, Baltimore, Maryland, USA.,Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
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97
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Caiano LM, Riva N, Carrier M, Gatt A, Ageno W. Treatment of portal vein thrombosis: an updated narrative review. Minerva Med 2021; 112:713-725. [PMID: 33832217 DOI: 10.23736/s0026-4806.21.07526-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Portal vein thrombosis (PVT) is the most frequent among the splanchnic vein thrombosis, accounting for 90% of cases. More than half of PVT are provoked by liver cirrhosis, solid cancer or myeloproliferative neoplasms. The remaining cases are non-malignant non-cirrhotic PVT and include either unprovoked events or thrombosis secondary to other less common risk factors (e.g. abdominal surgery, intrabdominal inflammations/infections, or hormonal stimuli). Anticoagulant therapy in patients with acute symptomatic PVT should be started early after diagnosis, if no active bleeding, to obtain greater vessel recanalization and reduce the occurrence of portal-hypertension related complications. Gastroesophageal varices do not represent a contraindication to anticoagulant treatment, as long as adequate measures have been undertaken for the prophylaxis of gastroesophageal bleeding. Different treatment options (unfractionated or low molecular weight heparin, vitamin K antagonists and direct oral anticoagulants [DOACs]) can be considered. In this narrative review we will discuss the treatment of PVT in the three most common scenarios (cirrhosis-associated, cancer-associated and non-malignant non-cirrhotic PVT). We will also discuss the role of the DOACs and summarise recent guidelines on this topic.
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Affiliation(s)
- Lucia M Caiano
- Department of Medicine and Surgery, University of Insubria, Varese, Italy.,Department of Medicine, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada
| | - Nicoletta Riva
- Department of Pathology, Faculty of Medicine and Surgery, University of Malta, Msida, Malta -
| | - Marc Carrier
- Department of Medicine, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada
| | - Alex Gatt
- Department of Pathology, Faculty of Medicine and Surgery, University of Malta, Msida, Malta
| | - Walter Ageno
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
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98
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Sinz S, Glaser-Gallion F, Steffen T. Portal vein thrombosis in COVID-19 infection. Surg Case Rep 2021; 7:87. [PMID: 33830380 PMCID: PMC8027970 DOI: 10.1186/s40792-021-01173-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 04/02/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND The COVID-19 pandemic has rapidly spread worldwide. As it is a novel disease, we have less experience in its possible appearances. Predominantly affecting the respiratory tract, about 20-43% patients also present with extrapulmonary manifestations such as coagulation disorders with thrombotic angiopathy. CASE PRESENTATION In our institution, a patient presented to the emergency department with acute abdominal pain which was caused by portal vein thrombosis. As a COVID-19 nasopharyngeal antigen swab few days earlier was negative, we performed several tests to find out its etiology. After all tests were inconclusive and the patient suffered flu-like symptoms 2 weeks before, we repeated COVID-19 molecular testing and received a positive test result. The patient was treated symptomatically and received therapeutic anticoagulation. CONCLUSION A COVID-19 infection can also be present without typical pulmonary symptoms. In patients with severe abdominal pain and new diagnosed portal vein thrombosis, it is important to think of a COVID-19 infection. Also, the reliability of antigen nasopharyngeal swab should be considered critically, especially if performed wrongly. We recommended to perform molecular tests when in doubt. After the diagnosis of portal vein thrombosis, immediate anticoagulation is recommended to reduce the risk of further complications like intestinal infarction.
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Affiliation(s)
- Stefanie Sinz
- Department of General, Visceral, Endocrine and Transplantation Surgery, Kantonsspital St. Gallen, 9007, Saint Gallen, Switzerland.
| | | | - Thomas Steffen
- Department of General, Visceral, Endocrine and Transplantation Surgery, Kantonsspital St. Gallen, 9007, Saint Gallen, Switzerland
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99
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Brown RS, Imawari M, Izumi N, Osaki Y, Bentley R, Ochiai T, Kano T, Peck-Radosavljevic M. Assessing the periprocedural magnitude of platelet count change in response to lusutrombopag. JHEP Rep 2021; 3:100228. [PMID: 33644726 PMCID: PMC7887643 DOI: 10.1016/j.jhepr.2021.100228] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/20/2020] [Accepted: 12/08/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND & AIMS Despite limitations, platelet transfusion has been used to minimise bleeding risk in patients with thrombocytopaenia. Lusutrombopag is an oral, thrombopoietin receptor agonist approved for treatment of thrombocytopaenia associated with chronic liver disease in patients undergoing planned invasive procedures. This post-hoc analysis assessed the magnitude of platelet count change based on the integrated per-protocol population from 2 similar phase III multicentre, randomised, double-blind, placebo-controlled trials. METHODS Adults with chronic liver disease-induced thrombocytopaenia and platelet count <50 (× 109/L) received lusutrombopag 3 mg or placebo ≤7 days before invasive procedure scheduled 9-14 days after randomisation. Platelet transfusion was required per protocol if the platelet count remained <50 no more than 2 days before the planned invasive procedure. Post-hoc analysis included: proportion of patients with platelet count ≥50, ≥1.5-fold increase, and a doubling of platelet count; maximum and maximum change in platelet count; and platelet count time course. RESULTS Platelet count ≥50, a platelet count increase ≥1.5-fold, and at least a doubling in platelet count were achieved in 88.3%, 86.9%, and 52.6% of patients in the lusutrombopag group (n = 137) vs. 58.6%, 32.3%, and 6.0% of patients in the placebo group (n = 133), respectively. In the lusutrombopag group, median maximum platelet count across baseline platelet counts of <30, ≥30 to <40, and ≥40 was 46, 76, and 87, respectively. Median maximum change in platelet count by baseline platelet count was +24, +42, and +40, respectively. Patients who received lusutrombopag without platelet transfusion achieved a median platelet count ≥50 for 3 weeks. CONCLUSIONS Patients treated with lusutrombopag experienced a clinically relevant response in platelet count for a substantial duration of time. LAY SUMMARY Patients with low platelet counts caused by chronic liver disease may not receive planned invasive procedures or surgeries because of an increased risk of bleeding. Lusutrombopag has previously demonstrated efficacy in raising platelet counts and is approved to treat chronic liver disease patients with low platelet counts in advance of a planned surgery. Physicians need to understand more clearly what to expect in terms of platelet count change when using lusutrombopag; this integrated analysis provides data to help guide its clinical application.
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Key Words
- AE, adverse event
- CLD, chronic liver disease
- CT, computerised tomography
- GCP, Good Clinical Practice
- HR, hazard ratio
- ICF, informed consent form
- ICH, International Conference on Harmonisation
- ITT, intention-to-treat
- LUSU, lusutrombopag
- Lusutrombopag
- MRI, magnetic resonance imaging
- Magnitude
- PBO, placebo
- PP, per protocol
- PT, platelet transfusion
- Platelet
- Procedural
- TCP, thrombocytopaenia
- TEAE, treatment-emergent adverse event
- Thrombocytopaenia
- US, ultrasonography
- WHO, World Health Organization
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Affiliation(s)
- Robert S. Brown
- Division of Gastroenterology and Hepatology, Weill Cornell Medical College, New York, NY, USA
| | - Michio Imawari
- Institute for Gastrointestinal and Liver Disease, Shin-Yurigaoka General Hospital, Kawasaki, Japan
| | - Namiki Izumi
- Department of Gastroenterology and Hepatology, Musashino Red Cross Hospital, Tokyo, Japan
| | | | - Roy Bentley
- Global Market Access, Shionogi Inc., Florham Park, NJ, USA
| | | | - Takeshi Kano
- Global Project Management Department, Shionogi & Co., Ltd., Osaka, Japan
| | - Markus Peck-Radosavljevic
- Abteilung Innere Medizin & Gastroenterologie (IMuG), mit Zentrale Aufnahme & Erstversorgung (ZAE), Klinikum Klagenfurt am Wörthersee, Klagenfurt, Austria
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100
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Al Moosawi M, Trudeau J, Smith T, Lefebvre A, Shih AW. ROTEM in the setting of liver transplant surgery reduces frozen plasma transfusion. Transfus Apher Sci 2021; 60:103125. [PMID: 33775554 DOI: 10.1016/j.transci.2021.103125] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 02/28/2021] [Accepted: 03/19/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND INR is traditionally used as a marker of clinical coagulopathy, but is suboptimal in liver disease patients due to rebalanced hemostasis and its ineffectiveness to predict bleeding. Rotational thromboelastometry (ROTEM) testing evaluates whole blood hemostasis, which may provide more accurate assessments with the EXTEM CT parameter than INR. Thus, in end-stage liver disease (ESLD) patients, we hypothesized that elevated INRs are associated with normal EXTEM CT values. METHODS A retrospective study assessing adult (>18) patients with ESLD and elevated INRs undergoing liver transplantation, was performed to assess correlations between INR and EXTEM CT. This included patients post-ROTEM implementation where all had pre-operative ROTEM testing; and patients up to one year pre-ROTEM implementation to compare transfusion utilization. Data abstracted also included patient demographics, coagulation testing results, liver disease etiology, and MELD score. RESULTS The study included 138 patients in the post-ROTEM group and 59 patients in the pre-ROTEM group. Normal EXTEM CT was observed in 95.3 % and 93 % of patients with INR of 1.3-1.8 and up to 3 respectively. There was no correlation between INR of 1.3-1.8 and EXTEM CT (⍴ = 0.239), and only moderate correlation was observed with higher INRs (⍴ = 0.617 with INRs >1.8). ROTEM-guided transfusion in liver transplant surgeries was associated with reduced plasma transfusion (OR 0.27, 95 % CI 0.12-0.58, p = 0.001) after adjusting for red cell utilization and coagulation testing. CONCLUSION Our study suggests ROTEM may be advantageous for evaluating coagulopathy in patients with liver disease and ROTEM-guided transfusion reduces plasma transfusion.
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Affiliation(s)
- Muntadhar Al Moosawi
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jacqueline Trudeau
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Department of Anesthesiology, Pharmacology, and Therapeutics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Tyler Smith
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Alexandre Lefebvre
- Department of Cardiothoracic Anesthesiology, Copenhagen University Hospital, Copenhagen, Denmark
| | - Andrew W Shih
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, Canada.
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