Inari Medical announces first enrolment in DEFIANCE trial evaluating clinical outcomes of ClotTriever system in DVT


inariInari Medical has announced that the first patient has been enrolled in DEFIANCE, a prospective randomised controlled trial (RCT) comparing the clinical outcomes of patients with iliofemoral deep vein thrombosis (DVT) treated with the ClotTriever system versus anticoagulation only. The trial is led by principal investigators Xhorlina Marko, interventional radiologist at Beaumont Health (Dearborn, USA), Steven Abramowitz, chair of vascular surgery at MedStar Health (Washington DC/Leonardtown, USA), and Stephen Black, consultant vascular surgeon, Guy’s and St. Thomas’ Hospital (London, UK).

The first DEFIANCE patient was enrolled by Abdullah Shaikh, interventional radiologist at Allegheny Health Network (Pittsburgh, USA). DEFIANCE will enrol 300 DVT patients at up to 60 centres worldwide. DEFIANCE is Inari’s second RCT, enrolling in parallel to the PEERLESS pulmonary embolism trial.

“We are thrilled to enrol the first patient and officially kick off this important clinical trial,” said Shaikh. “ClotTriever is fundamentally different to other DVT treatments. This trial is designed to produce definitive evidence to change standard of care.”

“DEFIANCE is an important step forward and will answer critical questions about how we manage DVT patients,” said Abramowitz. “Prior RCTs have focused on thrombolytic-based interventions, which have known downsides and limited effectiveness. This ClotTriever RCT is the first to compare lytic-free thrombectomy to anticoagulation for DVT.”

“With six major clinical studies, including two ongoing RCTs, Inari is wholly committed to [venous thromboembolism] patients and producing definitive evidence to support our technologies,” said Thomas Tu, Inari’s chief medical officer. “None of this is possible without the collaboration and dedication of our clinical trial investigators, who continually push the field forward in the name of better patient outcomes.”


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