US Pivotal Clinical Study of the Adient Absorbable Filter for the Prevention of Pulmonary Embolism

Phase

N/A

Condition

Thrombosis

Claudication

Deep Vein Thrombosis

Treatment

best practice VTE prophylaxis

Adient absorbable filter + best practice VTE prophylaxis

Clinical Study ID

NCT05127915

PROT-CI2021

Ages > 18
All Genders
Accepts Healthy Volunteers

Study Summary

The objective of the study is to evaluate the safety and efficacy of the Adient absorbable filter for the prevention of pulmonary embolism (PE: blood clot in the lungs). PE claims the lives of over 100,000 Americans each year, more than breast cancer, traffic fatalities and HIV combined.

Pharmaceutical anticoagulation (blood thinners) that reduce blood clot formation represent the standard of care for treating patients at risk for PE. However, for people who are temporarily unable to use anticoagulants, such as those who have suffered major trauma or those who are scheduled for surgical procedures, inferior vena cava (IVC) filters are used to help protect against PE. These blood filters prevent large blood clots that originate in the deep veins of the legs (deep vein thrombosis (DVT)) from reaching your lungs causing a potentially life-threatening PE.

Conventional metal IVC filters have been proven effective at reducing the incidence of PE, however, most require retrieval. If not retrieved within a timely manner (months), they can perforate the IVC, impale nearby organs with their barbed struts, and cause blood clots.

In contrast, the Adient absorbable filter traps blood clots similar to conventional metal IVC filters, but following the 8 week protection period, the filter itself breaks down into carbon dioxide and water. Hence no filter retrieval is required and complications are less likely due to the shortened indwell time. Once blood clots are trapped in the absorbable filter, the body's thrombolytic enzymes dissolve the clots within weeks while the filter itself resorbs in 6 to 8 months. The absorbable filter is braided from absorbable suture that has been proven safe over 4 decades.

The question being addressed with the randomized controlled trial portion is whether the placement of the absorbable filter in addition to current best practice PE prevention (sequential compression machines, compression stockings, and anticoagulants when indicated) significantly reduces the incidence of clinically significant PE in high risk subjects.

The absorbable filter will be indicated for the temporary prevention of PE in patients with transient high risk for venous thromboembolism (DVT and/or PE) with or without venous thromboembolic disease and as an enhancement to pharmaceutical anticoagulation and mechanical prophylaxis.

Eligibility Criteria

Inclusion

INCLUSION CRITERIA: Aged 18 years or older Willing to comply with the specified follow-up requirements including contrast enhanced CTsfor the 9-month duration of the study For female subjects of childbearing potential: a negative pregnancy test within 48 hoursprior to the implantation procedure For the prophylactic cohort, high risk VTE denoted by either: Caprini score > 8 for surgical ICU, Parvizi score ≥ 150 for TKA (total knee replacement),ISS score ≥ 24 for trauma. For the therapeutic cohort, documented VTE per the following: Pulmonary thromboembolism when anticoagulants are contraindicated, Failure of anticoagulanttherapy in thromboembolic diseases, Emergency treatment following massive pulmonaryembolism where anticipated benefits of conventional therapy are reduced. Requirement of temporary PE protection (8 weeks) based on clinical judgment Fully informed subject or caretaker consent having executed an Institutional Review Board (IRB) or approved informed consent.

Exclusion

EXCLUSION CRITERIA: Expected high VTE risk to extend beyond 8 weeks. Vena cava filter currently implanted History of abdominal or pelvic radiation therapy Previous IVC filter placement/retrieval within 6 months prior to randomization Confirmed positive blood cultures within the last 48 hours if there is bacteremia Known sensitivity to radiographic contrast medium that cannot be adequatelyprophylactically pre-medicated Known allergy or intolerance to IVC filter materials (i.e. PDSII absorbable suture) Pregnant, lactating, or plans to become pregnant during investigation follow-up period Renal insufficiency (GFR < 60) or requiring renal replacement therapy IVC effective diameter (D) <16 mm or >28 mm anywhere within L1-L4, D = √(AP*Lat) Less than 7cm from inferior-most renal vein to the iliac vein confluence Duplication of the IVC Any thrombus or occlusion in IVC on pre-procedural CT cavogram Life expectancy of < 12 months Simultaneous participation in another investigative drug or device trial that has notreached its primary endpoint Other co-morbid condition that, in the opinion of the Investigator, could limit thesubject's ability to participate in or would affect the scientific integrity of the study Previously enrolled in a clinical investigation of the Adient filter. For Roll In, patient has advanced heart failure or recent (6 weeks) myocardial infarction.

Advanced heart failure is defined by NYHA class IV or AHA/ACC/HFSA stage D or LVEF < 40%.Subjects with MI diagnosed with ECG alone without MI history and symptoms are not excluded.

Study Design

best practice VTE prophylaxis

January 27, 2023

December 31, 2026

Connect with a study center

University of Colorado Anschutz Medical Campus
Aurora, Colorado 80045
United States
Site Not Available
IU Health University Hospital
Indianapolis, Indiana 46202
United States
Site Not Available

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