📊 Evidence-Based Reference

ClotTriever Thrombectomy System

Inari Medical, Inc.

Contact a rep Compare similar devices

Summary: The ClotTriever Thrombectomy System is a mechanical thrombectomy device used primarily for venous thromboembolism. Key evidence highlights its efficacy in treating deep vein thrombosis with a focus on safety and clinical outcomes.

FDA Clearance Information

Pathway ? 510(k)
Number ? K221531 ↗
Decision Date ? February 6, 2023
Product Code ? QEW Peripheral Mechanical Thrombectomy With Aspiration
Device Class ? Class 2
Evidence ? 23 studies

The ClotTriever Thrombectomy System received FDA 510(k) clearance on February 6, 2023. Manufactured by Inari Medical, it is classified as a Class 2 device under product code QEW.

What It Is

The ClotTriever Thrombectomy System is designed for mechanical thrombectomy in venous thromboembolism cases. It functions by physically removing clots from the venous system, aiming to restore normal blood flow and reduce thrombus burden.

FDA-Cleared Indications

  • Mechanical thrombectomy for the removal of thrombus from peripheral blood vessels.
  • Use with aspiration to remove thrombus from peripheral vessels.
  • Intended for use in patients with peripheral venous thromboembolism when mechanical clot removal is clinically appropriate.

Clinical Applications

  • Mechanical thrombectomy for lower-extremity deep vein thrombosis, including iliofemoral DVT.
  • Mechanical thrombectomy for upper-extremity venous thrombosis.
  • Removal of thrombus associated with inferior vena cava filter thrombosis.
  • Catheter-based removal of thrombus from peripheral veins when aspiration-assisted mechanical thrombectomy is selected.

Reported off-label uses

  • Use in selected pulmonary embolism thrombectomy procedures, depending on the specific device configuration, anatomy, and applicable labeling.
  • Removal of thrombus from dialysis fistulas or grafts when clinicians use the system outside its cleared peripheral venous indication.

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 RCTs, case series, and retrospective analyses, published between 2023 and 2025. These studies provide insights into the device's efficacy and safety profile.

Reported Outcomes

Published studies report that the ClotTriever Thrombectomy System effectively reduces thrombus burden and improves clinical outcomes in patients with deep vein thrombosis. Technical and clinical outcomes have been favorable in both upper extremity and thoracic central vein thrombosis cases.

Safety Profile

Reported complications include access site adverse events, particularly when accessing small upper extremity veins. Overall, the safety profile is consistent with other mechanical thrombectomy devices, with no significant increase in major complications.

Evidence Limitations

Current evidence is limited by the small sample sizes and the lack of long-term follow-up data. Further research is needed to establish the device's efficacy across diverse patient populations and to evaluate long-term outcomes.

Practical Considerations

  • The system includes different catheter and sheath configurations; device selection depends on vessel diameter, clot location, access route, and thrombus burden.
  • The procedure is usually performed through venous access, commonly from the popliteal, femoral, or internal jugular vein, with fluoroscopic or other imaging guidance.
  • Large-bore venous access may be required, and aspiration can cause blood loss; operators should monitor hemodynamics and consider blood-conservation measures.
  • Contraindications and precautions include inability to obtain suitable vascular access, severe vessel disease or injury, active bleeding risk, and anatomic conditions that make mechanical thrombectomy unsafe.
  • MRI compatibility depends on the specific components and configuration. The device should be checked against the current manufacturer labeling before MRI, particularly while any component remains implanted.

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 ClotTriever Thrombectomy System is indicated for mechanical thrombectomy in venous thromboembolism, including deep vein thrombosis and inferior vena cava filter-associated thrombosis.

What outcomes have been reported in clinical studies?

Clinical studies have reported effective thrombus removal and improved clinical outcomes, particularly in iliofemoral and upper extremity deep vein thrombosis.

What complications have been reported?

Safety data indicate access site adverse events, especially when accessing small upper extremity veins, but no significant increase in major complications.

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.

📬 The IR Device Brief

One email a month: new FDA clearances, recalls and device pages in vascular & interventional radiology.

We'll email you a link to confirm. Unsubscribe any time.

Suggest edits

For manufacturers and their teams. Each field shows what the page says now: add, remove or rewrite anything, and leave the rest as is. LA Vascular reviews every change before it goes live.

About you