Efficacy and Safety of Rivaroxaban in Acute Non-neoplastic Portal Vein Thrombosis in HCV

Study Overview
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Brief Summary
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Portal vein thrombosis (PVT) in patients with liver cirrhosis may be due to neoplastic growth or non-neoplastic causes. Treating PVT with anticoagulation in liver cirrhosis is difficult to be established but may be of great benefit in acute symptomatic PVT. The ultimate goal is complete recanalization of the portal vein without inducing major bleeding, abnormal liver function tests or increased mortality.

Detailed Description
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Out of 220 patients with chronic HCV who had undergone splenectomy due to hypersplenism in the period extending from May 2014 until August 2016; 36 participants (16.4%) were selected. They were presented with acute PVT. Also, the investigators enrolled 4 patients who were presented with PVT due to portal pyemia complicated infected thrombosed internal piles (n=1), appendicular abscess (n=1), ulcerative colitis (n=2). Control group It included 30 patients who had acute non-neoplastic PVT with the same inclusion criteria and were given symptomatic therapy for ascites, abdominal pain and followed synchronously with the study group. Laboratory investigations They included investigation preliminary to splenectomy as liver function tests, coagulation profile, renal function tests, complete blood count, reticulocyte count and bone marrow aspiration. For each patient, Child-Pugh (CTP) and MELD scores were calculated. Abdominal Ultrasonography (USG) Cirrhotic echo pattern, criteria of portal hypertension, ascites, HCC were excluded Color Doppler Sonography to confirm the diagnosis of PVT. Upper GI Endoscopy All the patients before splenectomy were exposed to upper GI endoscopy to detect the presence and grading of gastro-esophageal varices. Protocol of therapy Enoxaparin was initiated at a dose of 1mg/kg every 12 hours subcutaneously for 3 days then treatment was continued with rivaroxaban 10mg/12 hr. Rivaroxaban was started 2 hours before the next dose of enoxaparin. Follow up every week with a questionnaire about symptoms of bleeding (hematemesis, melena, epistaxis, gum bleeding, vaginal bleeding, subcutaneous bleeding), worsening or improvement of abdominal pain. Bedside ultrasonography for detection of thrombus resolution and presence or improvement of ascites every 2 weeks Laboratory follow-up which included serum creatinine, complete blood count, and liver function tests to detect if there any side effects of the therapy every 2 weeks.

Official Title
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Efficacy and Safety of Rivaroxaban in the Management of Acute Non-neoplastic Portal Vein Thrombosis in HCV Related Compensated Cirrhosis

Conditions
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Portal Vein Thrombosis

Intervention / Treatment
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* Drug: Rivaroxaban
* Other: symptomatic therapy for ascites, abdominal pain


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Acute non-neoplastic portal vein thrombosis Compensated cirrhosis (Child class A-B) The onset of PVT is within 1 week. Exclusion Criteria: Decompensated liver disease Bleeding tendency or recent bleeding event as bleeding peptic ulcer or oesophageal varices Neoplastic invasion of the portal vein Renal impairment with the creatinine clearance ≤ 30 ml/min Pregnancy and breastfeeding Hypersensitivity to rivaroxaban Concomitant treatment with another anticoagulant Concomitant use of clopidogrel.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: 40 patients received rivaroxaban
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: study group<br>acute non-neoplastic PVT, compensated cirrhosis, acute PVT onset within 1 week after initial diagnosis - treated with rivaroxaban | Drug: Rivaroxaban<br>* Rivaroxaban 10 mg/12 hour<br>|
| Placebo Comparator: control group<br>acute non-neoplastic PVT, compensated cirrhosis, acute PVT onset within 1 week after initial diagnosis receive placebo | Other: symptomatic therapy for ascites, abdominal pain<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| complete recanalization of the portal vein | bedside ultrasonography for detection of thrombus resolution | 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| major bleeding | Questionnaire about symptoms of bleeding (hematemesis, melena, epistaxis, gum bleeding, vaginal bleeding, subcutaneous bleeding) | 6 months | 
| Hepatotoxicity | liver function tests as AST, ALT (IU/L), total bilirubin (mg/dl) | 6 MONTHS | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Portal vein, thrombosis, acute, rivaroxaban