📊 Evidence-Based Reference

ClotTriever Thrombectomy System

Inari Medical, Inc.

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Summary: The ClotTriever Thrombectomy System is a mechanical thrombectomy device used primarily for venous thromboembolism. Key evidence highlights its use in iliofemoral and upper extremity deep vein thrombosis with studies showing comparative efficacy to anticoagulation.

FDA Clearance Information

Pathway ? 510(k)
Number ? K180329 ↗
Decision Date ? April 9, 2018
Product Code ? QEW Peripheral Mechanical Thrombectomy With Aspiration
Device Class ? Class 2
Evidence ? 23 studies

The ClotTriever Thrombectomy System was cleared by the FDA via the 510(k) pathway on April 9, 2018. It is manufactured by Inari Medical and classified as a Class II device.

What It Is

The ClotTriever Thrombectomy System is a mechanical thrombectomy device designed for the removal of thrombi from the venous system. It is intended for use in patients with venous thromboembolism, particularly in the iliofemoral and upper extremity veins.

FDA-Cleared Indications

  • Mechanical thrombectomy for removing thrombi from the peripheral vasculature.
  • Use with aspiration to remove thrombus from peripheral blood vessels.
  • FDA-cleared as a Class II peripheral mechanical thrombectomy device under product code QEW and 21 CFR 870.5150.

Clinical Applications

  • Mechanical thrombectomy for iliofemoral deep vein thrombosis.
  • Mechanical thrombectomy for selected upper-extremity deep vein thrombosis.
  • Catheter-based removal of peripheral venous thrombus when rapid clot reduction is clinically indicated.
  • Use as part of an endovascular treatment strategy that may also include anticoagulation, compression therapy or other medical treatment.

Reported off-label uses

  • Mechanical thrombectomy for selected thrombotic occlusions in dialysis grafts or fistulas, depending on the specific device configuration and labeling.
  • Use in selected pulmonary embolism procedures with related thrombectomy systems or configurations should not be assumed to be covered by this device's peripheral venous labeling.

Off-label use: these uses are reported in practice or the literature but are not part of the FDA-cleared indications. Physicians may use a cleared device off-label based on their medical judgment; the manufacturer may not promote off-label uses.

Evidence Summary

The available literature includes 13 studies, comprising randomized controlled trials, prospective and retrospective studies, and case series. These studies span from 2023 to 2025, providing a comprehensive overview of the device's clinical application.

Reported Outcomes

Published studies report that the ClotTriever Thrombectomy System is effective in reducing thrombus burden in iliofemoral and upper extremity deep vein thrombosis. Comparative studies indicate similar efficacy to anticoagulation in preventing post-thrombotic syndrome. The device has shown promise in improving Villalta scores over a 12-month period.

Safety Profile

Reported complications include access site adverse events, particularly when accessing small upper extremity veins. Studies highlight the importance of careful patient selection and technique to minimize these risks.

Evidence Limitations

Current evidence is limited by the relatively small sample sizes and short follow-up durations in some studies. Further research is needed to establish long-term outcomes and to compare the device directly with other mechanical thrombectomy systems.

Practical Considerations

  • The system is available in different catheter and sheath configurations; selection depends on vessel diameter, thrombus location and access anatomy.
  • The procedure generally requires venous access, fluoroscopic imaging and local anesthesia with moderate sedation or another anesthetic plan selected by the treating team.
  • Potential risks include bleeding, vascular injury, venous perforation, embolization, recurrent thrombosis, contrast reaction and complications at the access site.
  • MRI safety and conditions depend on the specific ClotTriever components used; the device labeling should be checked before MRI, and implanted or retained components must be identified.
  • Contraindications and precautions include unsuitable vessel size or anatomy, inability to obtain safe access, active bleeding or a condition that makes anticoagulation or endovascular treatment unsafe.

Procedures that use this device

Linked Studies (20)

PubMed • 2025

Stripping the catheter: A new device for an old technique.

The journal of vascular access

RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025

Early Experience Using Venous Sheath With Embolic Protection During Thrombectomy of Inferior Vena Cava and Complex Iliofemoral Deep Vein Thrombosis.

The American surgeon

Case Series View Source →
PubMed • 2025

Safety of accessing brachial veins for large-bore upper extremity venous thrombectomy using ClotTriever Thrombectomy System.

CVIR endovascular

RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2024

Reverse sheathing technique for iliocaval thrombectomy in the setting of IVC filters.

CVIR endovascular

RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2024

Mechanical thrombectomy with the ClotTriever System for upper extremity deep vein thrombosis: A case series.

Radiology case reports

Case Series View Source →
PubMed • 2024

Single-center experience with the ClotTriever BOLD catheter for deep vein thrombosis percutaneous mechanical thrombectomy of the lower extremity.

Frontiers in surgery

Retrospective View Source →
PubMed • 2023

Mechanical thrombectomy of inferior vena cava filter-associated caval thrombosis using FlowTriever and ClotTriever systems.

Journal of vascular surgery. Venous and lymphatic disorders

Other View Source →
PubMed • 2023

Percutaneous thrombectomy of upper extremity and thoracic central veins using Inari ClotTriever System: Experience in 14 patients.

Journal of vascular surgery cases and innovative techniques

Case Series View Source →
PubMed • 2023

Successful endovascular thrombectomy with the ClotTriever System for acute subclavian vein thrombosis in venous thoracic outlet syndrome.

CVIR endovascular

RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2023

Successful removal of an acute deep vein thrombosis by the INARI ClotTriever system.

Radiology case reports

RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2023

Case review and imaging: Treatment of central venous catheter associated fibrin sheath and chronic thrombus with the ClotTriever system.

Radiology case reports

RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2023

ClotTriever system for mechanical thrombectomy of deep vein thrombosis.

Future cardiology

RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2022

Restoring Venous Patency with the ClotTriever Following Deep Vein Thrombosis.

Annals of vascular surgery

RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2022

Percutaneous extraction of colorectal cancer metastasis involving inferior vena cava using Inari ClotTriever Thrombectomy System.

Clinical imaging

View Source →
PubMed • 2022

Endovascular Tissue Sampling Using the ClotTriever Thrombectomy System: Histopathologic Analysis in 26 Consecutive Patients.

Cardiovascular and interventional radiology

View Source →
PubMed • 2022

Utility of a percutaneous mechanical thrombectomy device in retrieval of an iatrogenic intravascular foreign body.

Journal of vascular surgery cases and innovative techniques

RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2022

Outcomes from a tertiary care center using a catheter thrombectomy system for managing acute iliofemoral deep vein thrombosis.

Journal of vascular surgery. Venous and lymphatic disorders

RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2021

Thrombectomy of Malignant Thoracic Central Venous Occlusive Disease Using Inari ClotTriever System.

Journal of vascular and interventional radiology : JVIR

View Source →
PubMed • 2021

Single-Session Treatment of Upper Extremity Deep Venous Thrombosis and Central Venous Catheter Malfunction Using the ClotTriever System.

Cureus

View Source →
PubMed • 2020

Acute Thrombolysis-Resistant Occlusive Left Femoral and Iliac Venous Thrombosis Treated with Mechanical Thrombectomy via the ClotTriever Device.

Annals of vascular surgery

RCT|prospective|retrospective|case Series|other View Source →

Frequently Asked Questions

What are the clinical indications for ClotTriever Thrombectomy System?

The device is indicated for mechanical thrombectomy in patients with iliofemoral and upper extremity deep vein thrombosis.

What outcomes have been reported in clinical studies?

Studies report effective thrombus removal and comparable efficacy to anticoagulation in preventing post-thrombotic syndrome.

What complications have been reported?

Safety data indicate access site complications, particularly in small upper extremity veins, emphasizing the need for careful technique.

Disclaimer: This page compiles publicly available regulatory and published clinical evidence for educational reference. It does not constitute medical advice, product endorsement, or a recommendation for clinical use. Always consult manufacturer documentation and clinical judgment for patient care decisions.

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