Safety and Effectiveness Assessment of AneuFix Injectable Polymer Sac Filling to Assure Long-term Durability of EVAR. (SEAL-EVAR)

November 3, 2026 updated by: TripleMed B.V.

SEAL-EVAR: Safety and Effectiveness Assessment of AneuFix Injectable Polymer Sac Filling to Assure Long-term Durability of EVAR. A Randomized Controlled Multicenter Trial.

The goal of this clinical trial is to evaluate the safety and effectiveness of adding AneuFix Injectable Polymer sac filling to standard endovascular aneurysm repair (EVAR) in patients with an infrarenal abdominal aortic aneurysm (AAA) who are at high risk of developing a Type II endoleak after EVAR. The study will include adult men and women who are candidates for elective EVAR and meet predefined imaging criteria indicating a high risk of post-procedural Type II endoleak.

The main questions it aims to answer are:

  • Does the addition of AneuFix Injectable Polymer to standard EVAR reduce the occurrence of Type II endoleaks, prevent aneurysm sac growth, and reduce the need for AAA-related reinterventions within 12 months after treatment?
  • Is treatment with AneuFix Injectable Polymer safe, as measured by the rate of major adverse events within 30 days after the procedure?

Researchers will compare EVAR plus AneuFix Injectable Polymer sac filling with standard EVAR alone to determine whether sac filling improves aneurysm-related outcomes and reduces complications associated with persistent blood flow into the aneurysm sac following EVAR.

Participants will:

  • Undergo screening assessments, including review of medical history, imaging studies, and eligibility criteria.
  • Be randomly assigned in a 2:1 ratio to receive either:
  • Standard EVAR with AneuFix Injectable Polymer sac filling, or
  • Standard EVAR alone.
  • Attend follow-up visits at approximately 1 month, 6 months, 1 year, 2 years, 3 years, 4 years, and 5 years after treatment.
  • Undergo imaging assessments, including CT angiography and ultrasound or magnetic resonance angiography, to evaluate the presence of endoleaks, aneurysm sac size, and other aneurysm-related outcomes.
  • Be monitored for adverse events, reinterventions, aneurysm-related complications, and survival throughout the 5-year follow-up period.
  • Complete quality-of-life questionnaires at selected study visits.

This multicenter, randomized, controlled study plans to enroll approximately 150 participants at sites across Europe and follow them for up to 5 years after treatment.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Abdominal aortic aneurysm (AAA) is a progressive disease that can lead to aneurysm rupture if left untreated. Endovascular aneurysm repair (EVAR) has become a widely used treatment option for infrarenal AAA because it is less invasive than open surgical repair. However, long-term durability of EVAR can be affected by complications, particularly endoleaks that allow persistent blood flow within the aneurysm sac. Persistent sac pressurization may result in continued aneurysm sac enlargement, the need for secondary interventions, and, in some cases, aneurysm rupture. These complications contribute substantially to the long-term follow-up burden and healthcare costs associated with EVAR.

Type II endoleaks are among the most common endoleak types observed following EVAR and occur when retrograde blood flow enters the aneurysm sac through aortic side branches, such as the inferior mesenteric artery or lumbar arteries. Patients with specific anatomical characteristics are known to be at increased risk for development of Type II endoleaks and subsequent aneurysm sac enlargement.

AneuFix Injectable Polymer is an investigational injectable polymer designed to fill the aneurysm sac at the time of EVAR and interrupt blood flow through aortic side branches communicating with the sac. The polymer is delivered into the aneurysm sac after endograft placement, where it cures in situ to form a durable implant. The approach is intended to provide more complete occlusion of the aneurysm sac environment and associated side-branch ostia compared with selective embolization techniques.

Previous clinical experience with the AneuFix technology, including pilot, feasibility, and Type II endoleak treatment studies, has demonstrated procedural feasibility and provided preliminary evidence supporting further evaluation in a randomized controlled study.

The SEAL-EVAR study is a prospective, multicenter, randomized controlled trial designed to evaluate whether adjunctive aneurysm sac filling with AneuFix Injectable Polymer, when used in combination with standard EVAR, improves clinical outcomes compared with standard EVAR alone in patients at increased risk of developing Type II endoleaks. The study will assess both safety and effectiveness outcomes, including freedom from Type II endoleak, prevention of aneurysm sac enlargement, and reduction in AAA-related reinterventions. Long-term follow-up will be performed to evaluate durability of treatment effects and continued safety.

The results of this study are intended to provide high-quality clinical evidence regarding the role of prophylactic aneurysm sac filling as an adjunct to EVAR and to support future clinical, regulatory, and health-economic evaluations of this treatment strategy.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
150

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

22 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Age over 22 years

  • Presence of an infrarenal AAA with a maximum diameter of at least 5 cm for women and 5.5 cm for men

  • High risk of developing T2EL after the EVAR procedure, based on one or more of the following criteria observed on a preoperative CTA scan. High risk participants are those with:

    • A patent inferior mesenteric artery with a luminal diameter at its origin >3 mm OR
    • At least three pairs of patent lumbar arteries OR
    • Two pairs of lumbar arteries and a median sacral artery or an accessory renal artery

  • Subject or legal caregiver's willingness and ability to comply with the requirements of this clinical study and provide written informed consent

Exclusion Criteria:

General

  • Inability to provide informed consent.
  • Enrolled in another clinical study that could interfere with the outcomes being studied in this trial.
  • Unable or unwilling to comply with study follow-up requirements.
  • Prisoner or member of other vulnerable population

Anatomical

  • Vascular disease and/or anatomy that preclude the safe access and positioning of a catheter to deliver the investigational product into the AAA sac.
  • Aorto-Iliac aneurysms
  • Aneurysm sac requiring more than 100ml of AneuFix Injectable Polymer to fill
  • Ruptured, leaking, inflammatory or mycotic (infected) aneurysm.
  • Connective tissue disorder (e.g., Marfan's syndrome)
  • Aneurysmal disease of the descending thoracic aorta
  • Proximal abdominal aneurysm extent including or above the renal arteries
  • Calcification at the aortic bifurcation to common/internal iliac bifurcation, that might lead to access difficulties

Procedural

  • Use of endograft without support struts in the bifurcation (e.g. Endologix - Alto)
  • Use of an aortic stent graft other than those specified for a particular site
  • Planned off-label use of the chosen stent graft
  • Use of fenestrated stent grafts or chimney techniques
  • Use of embolic products to prophylactically or concomitantly embolize the inferior mesenteric artery, lumbar arteries, renal accessory arteries, or internal iliac arteries
  • Inability to land the distal-most portion of the EVAR stent graft limbs, including extensions, above the internal iliac arteries, except when the internal iliac artery pre-procedure is already occluded.

Medical History/Conditions

  • Coagulopathy or uncontrolled bleeding disorder
  • Serum creatinine level > 2.5 mg/dL
  • Cerebrovascular accident within 3 months prior to the procedure
  • Myocardial infarction and/or major heart surgery within 3 months prior to the procedure
  • Atrial fibrillation that is not well rate controlled
  • Life expectancy of <2 years post-procedure
  • Known hypersensitivity or other contraindication to tantalum
  • Active infection at the time of the index procedure documented by pain, fever, drainage, positive culture, or leukocytosis (WBC>11,000/mm3)
  • A condition that inhibits radiographic visualization during the implantation procedure
  • History of allergy to contrast medium that cannot be managed medically, or subject is unable to have a CTA with contrast for any reason.
  • Uncontrolled co-morbid medical condition, including mental health issues, that would adversely affect participation in the trial
  • Pregnant or lactating female: for females of child-bearing potential, based on a positive pregnancy test within 7 days prior to the procedure or refusal to use a medically accepted method of birth control for the duration of the trial.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: EVAR + AneuFix Injectable Polymer

Participants will undergo standard EVAR followed by delivery of AneuFix Injectable Polymer into the aneurysm sac according to the study procedure. The polymer is intended to fill the aneurysm sac and occlude blood flow pathways that may contribute to the development of Type II endoleaks.
Device: AneuFix Injectable Polymer

Injectable polymer intended for delivery into the abdominal aortic aneurysm sac during EVAR to provide aneurysm sac filling and occlusion of blood flow pathways associated with Type II endoleak formation.

Procedure: Endovascular AneuRysm Repair (EVAR)

Endovascular placement of a commercially available stent graft to exclude the abdominal aortic aneurysm from systemic blood flow.
Active Comparator: Standard EVAR

Participants will undergo standard EVAR according to the site's standard practice without adjunctive treatment with AneuFix Injectable Polymer.
Procedure: Endovascular AneuRysm Repair (EVAR)

Endovascular placement of a commercially available stent graft to exclude the abdominal aortic aneurysm from systemic blood flow.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Composite Treatment Success at 12 Months
Time Frame: 12 Months

Proportion of subjects achieving treatment success at 12 months, defined as single composite of:

  • Freedom from incidence of Type II endoleak;
  • Freedom from Sac Growth (>5 mm);
  • Freedom from AAA-related secondary intervention.
12 Months
Major Adverse Event (MAE) rate within the 30-day follow-up period after the procedure
Time Frame: 30 Days Post-Procedure

Major Adverse Event (MAE) rate within the 30-day follow-up period after the procedure.

  • MAE related to the AneuFix Injectable Polymer Sac Filling procedure: ischemia in end organs (bowel, spine, legs) or paraplegia due to non-target embolization, perforation, rupture
  • MAE related to the EVAR procedure: all-cause mortality, AAA-related mortality, myocardial infarction, renal failure, respiratory failure, stroke or procedural blood loss >1000 ml.
  • Conversion to Open Repair
30 Days Post-Procedure

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Incidence of Type II Endoleak (T2EL)
Time Frame: 1 month, 6 months, 2 years, 3 years, 4 years, and 5 years Post-Procedure

Percentage of subjects with a persistent or recurrent Type II endoleak confirmed by imaging assessment.
1 month, 6 months, 2 years, 3 years, 4 years, and 5 years Post-Procedure
Incidence of Type I, III or IV Endoleak
Time Frame: 1 month, 6 months, 2 years, 3 years, 4 years, and 5 years Post-Procedure

Percentage of subjects with a Type I, III or IV endoleak identified on imaging assessment.
1 month, 6 months, 2 years, 3 years, 4 years, and 5 years Post-Procedure
Change in Aneurysm Sac Diameter
Time Frame: 2 years, 3 years, 4 years, and 5 years Post-Procedure

Change in maximum aneurysm sac diameter measured in millimeters (mm) compared with baseline.
2 years, 3 years, 4 years, and 5 years Post-Procedure
Change in Aneurysm Sac Volume
Time Frame: 2 years, 3 years, 4 years, and 5 years Post-Procedure

Change in aneurysm sac volume measured in cubic centimeters (cm³) compared with baseline.
2 years, 3 years, 4 years, and 5 years Post-Procedure
Aneurysm-Related Reintervention Rate
Time Frame: Until the end of study (5 years)

Percentage of subjects requiring aneurysm-related reintervention. Reinterventions will be categorized as open surgical or endovascular procedures and the reason will be recorded.
Until the end of study (5 years)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
TripleMed B.V.

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Clinfidence B.V.
Xper Research

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Hans Brom, Dr., TripleMed B.V.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 15, 2027

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 31, 2029

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 3, 2033

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 19, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 3, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 10, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 10, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 3, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • TripleMed 004

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

The Clinical Investigation Plan does not include provisions for sharing individual participant data with external researchers. Study results will be reported through the Clinical Investigation Report and scientific publications.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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