Philips Launches Implantable Device to Treat Symptomatic Venous Outflow Obstruction

Royal Philips announced the launch and first implant of the Duo Venous Stent System, an implantable medical device indicated to treat symptomatic venous outflow obstruction in patients with chronic venous insufficiency (CVI), following premarket approval (PMA) from the FDA.

Dr Erin Murphy – vascular surgeon and director of the Venous and Lymphatic Program at the renowned Sanger Heart & Vascular Institute, Atrium Health, in Charlotte, NC, and an investigator in the VIVID study, which contributed to the device’s FDA approval – successfully used the Duo Venous Stent System for the first time outside of a clinical trial.

Deep venous disease results from venous thromboembolism, a condition that occurs when a blood clot forms in the vein. Deep venous anatomy and obstructions can present a multitude of complexities and mechanical challenges.

Engineered for the unique demands of venous anatomy and obstructions, the Duo Venous Stent System is comprised of two stents – Duo Hybrid and Duo Extend – of various sizes. Duo Hybrid has a distinct integrated design that combines multiple zones of differing mechanical properties into a single stent. For long lesions, Duo Extend smoothly overlaps with the Duo Hybrid to extend therapy. These two stents are designed to work together and minimize the risk of stent fracture and corrosion, while providing an option to stent within caudal veins with smaller diameters.

“Duo is the first stent that offers a differential design for the challenges of venous anatomy – a focal area that withstands the forces of compression as well as the flexibility to accommodate curvature of the vessel,” said Dr Kush Desai, a highly regarded interventional radiologist and associate professor of Radiology, Surgery and Medicine at Northwestern University in Chicago, as well as a leading enroller and investigator for the VIVID study.

“Consequently, Philips is well positioned to support CVI treatment by offering a robust portfolio of medical technology that includes both intravascular ultrasound and a differentiated venous stenting system.”

The VIVID study is a global, prospective, multi-center, single-arm, non-blinded clinical trial conducted in the US and Poland, evaluating the safety and efficacy of the Philips Duo Venous Stent System in the treatment of nonmalignant iliofemoral occlusive disease. It enrolled 162 subjects at 30 centers with three patient populations – non-thrombotic iliac vein lesion (NIVL), post-thrombotic syndrome (PTS) and acute deep vein thrombosis (aDVT). The VIVID study is now in 36-month follow-up and upon FDA PMA approval transitioned from an investigational device exemption (IDE) study to a post-approval study (PAS): NCT04580160.

The VIVID study met all of its primary safety and efficacy performance goals.

• The 12-month effectiveness endpoint for primary patency reached 90.2%, which exceeded the performance target goal of 77.3%.
• The 12-month primary safety endpoint of 98.7% also exceeded the corresponding performance goal of 89%.

In addition, quality of life and venous functional assessments that were performed in the VIVID study – including Clinical-Etiology-Anatomy-Pathophysiology (CEAP), Venous Clinical Severity Score (VCSS), Villalta, EQ-5D-3L and VEINES scores –showed sustained improvements compared to baseline at 12 months.

“The VIVID study’s 12-month results demonstrate the safety and efficacy of the Duo Venous Stent System in the treatment of chronic venous insufficiency, a vascular condition affecting millions of people worldwide,” said principal investigator Dr Mahmood Razavi, MD, an interventional radiologist with St. Joseph Vascular in Orange County, Calif.

“Duo represents a meaningful addition to the tools that clinicians can use to treat CVI patients,” Dr Razavi added, “especially when used in conjunction with intravascular ultrasound, or IVUS. Ultimately, the new device promises to enable excellent clinical outcomes and drive significant quality of life improvements.”

The VIVID study was the first clinical trial to mandate IVUS use to aid in lesion assessment and stent sizing prior to device implantation. According to prior published research, IVUS supports accurate diagnosis of venous disease and has been shown to change 57% of treatment plans compared to venography alone. Intravascular imaging is used in more than 70% of venous stent procedures.

“The launch of the Duo Venous Stent System represents another step forward in achieving our aspiration to innovate interventional procedures with advanced medical technology,” said Heather Hudnut Page, Vice President and Business Leader of Peripheral Vascular at Philips. “In this context, we look forward to bringing the combined offering of intravascular ultrasound and Duo to the interdisciplinary teams – from vascular surgeons to interventional radiologists and interventional cardiologists – who share our overarching goal of enhancing patient care.”