PREPIC 2 : Prevention of Recurrent Pulmonary Embolism by Vena Cava Interruption

Study Overview
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Brief Summary
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The purpose of this study is to assess efficacy and safety of optional vena cava filter implanted 3 months in prevention of recurrent pulmonary embolism in patients presenting with acute pulmonary embolism associated with thrombotic risk factors

Detailed Description
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Pulmonary embolism is a common pathology, which could be fatal (about 10 000 death/year in France). It mainly originates from a deep vein thrombosis. In order to reduce mortality, prevention of new or recurrent PE is a major therapeutic aim. Only one randomised trial (PREPIC) assessed the interest of a vena cava filter in patients treated by anticoagulant treatment for a deep vein thrombosis (DVT). Results show a significant 50 % reduction of the embolic risk with the filter. This benefit occurs from the first days, but are counterbalanced by a long-term increasing risk of recurrent DVT. The filter appears promising in patients with a high risk of PE, for exemple the elderly, presenting with a thromboembolic history, cancer, heart failure or respiratory insufficiency, or a recent PE. Moreover, retrievable filters, which may be either left in place permanently or retrieved after some days or weeks, could limit the filter thrombosis risk. The aim of PREPIC 2 study is to assess, in a multicenter randomised trial, efficacy and safety of a retrievable vena cava filter implanted 3 months versus no filter in 400 patients treated with anticoagulant drugs for a symptomatic PE associated with at least one thrombotic risk factor. A clinical follow-up will be performed at 6 months. The primary outcome is the incidence of recurrent PE at 3 months, including symptomatic and fatal PE. It will be adjudicated by an independent committee, blinded to patients' allocation. This study will assess the benefit risk ratio of the retrievable filter for the prevention of recurrent PE, without increasing the thrombotic risk and the disadvantage due to post thrombotic syndrome.

Official Title
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PREPIC 2 : Interruption of Inferior Vena Cava by a Retrievable Filter for the Prevention of Recurrent Pulmonary Embolism : a Randomised, Open Label Study

Conditions
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Venous Thrombosis, Pulmonary Embolism

Intervention / Treatment
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* Device: ALN optional filter


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Informed consent Acute symptomatic pulmonary embolism; AND Deep or superficial vein thrombosis; AND At least one of the risk factors below : More than 75 years old Evolutiv cancer (excepting locally cutaneous cancer) Known chronic heart failure treated Chronic respiratory insufficiency treated Bilateral deep vein thrombosis Ilio-cava thrombosis Ischemic stroke > 3 days and < 6 months, with lower limb deficit Cardiac repercussion of pulmonary embolism assessed by echocardiography or increasing troponin I or T, or Brain Natriuretic Peptid or proBNP Exclusion Criteria: Contrindication to an anticoagulant treatment or recurrent thromboembolic event despite adequate anticoagulation Vena cava filter already inserted Filter insertion impossible due to caval thrombosis More than 72 hours pre-randomized treatment with therapeutic dosage of anticoagulant therapy Non carcinologic surgery within 3 months prior randomization Carcinologic surgery within 10 days prior randomization Hypersensitivity to contrast media Access port in place or programmed within 3 months Woman who are child bearing Life expectancy < 6 months

Ages Eligible for Study
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Minimum Age: 18 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: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: 1<br>ALN optional filter | Device: ALN optional filter<br>* J1 : ALN optional filter M3 : ALN optional filter removed<br>|
| No Intervention: 2<br>No ALN optional filter | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| at 3 months, combined criteria including recurrent PE confirmed by objective tests and fatal PE confirmed by autopsy and death which can not be attribuated to a documented cause and for which PE/DVT can't be ruled out |  | 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| recurrent pulmonary embolism, fatal or not, at 6 months (combined criteria including recurrent pulmonary ambolism confirmed by objective tests and fatal PE confirmed by autopsy and death which can not be attribuated to a documented cause and for which P |  | 6 months | 
| current or new symptomatic DVT confirmed by objective tests |  | 6 months | 
| mecanical complication of filter (migration, tilt, transfixion) and or puncture site hematoma, and/or local or general infection due to filter |  | 6 months | 
| filter thrombosis |  | 6 months | 
| filter retrieval failure |  | 6 months | 
| total death |  | 6 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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pulmonary embolism, inferior vena cava filters, venous thrombosis, randomized controlled trial