Our technology


Deep Vein Thrombosis (DVT) affects close to 1 million people each year and occurs when a blood clot (thrombus) forms in the deep veins in the body. Between 25 to 60% of these DVT patients suffers from Post Thrombotic Syndrome (PTS) which includes painful swollen legs leading to immobility and other skin issues, decreasing their quality of life significantly.


Deep Vein Thrombosis (DVT) is a blood clot (thrombus) that obstructs one or more of the deep veins in the body, usually in the legs (2M/year)


25% of these DVT cases is an Iliofemoral DVT potentially treated with a thrombectomy after which 50% needs to be stented (0,25M/year)


After a DVT, 25 % develops a Post Thrombotic Syndrom (PTS) due to a central venous obstruction (15M prevalence)


PTS is treated by anti-coagulation, compression and mobilisation. Stenting is a better alternative to this treatment.


To date stents still have a failure rate of 15-25%, and patients are often forced to use anti-coagulants life long.

There is a clear need for a new generation venous stent


Veins are constantly changing in form and shape and therefore axial and longitudinal flexibility is needed


Nitinol, is a memory metal and therefore implanted stents will try to regain the shape they had in the factory which could hinder the blood flow through the stent


Venous Stent B.V. develops the world’s first in length adjustable multi-segmented tapered venous stent: The WStent. This design is based on the fact that in venous stenting it is not necessary to cover the complete endothelial wall as in arteries, but it is just there to prevent the vein from collapsing. The novel segmented design allows for high radial force per segment and high flexibility due to thin connections between the segments. This, combined with the adjustable intersegmental distances, leads to less stent material against the vein wall, nurturing faster endothelial healing and higher porosity for inflow through covered sidebraches, and therefore reducing the necessity to anticoagulants use in the long run.

WStent Design

WStent is a novel, dedicated and segmental venous stent with a design that allows for major clinical improvement


  • More flexibility (segmental)
  • High radial force (closed cell segments)
  • Higher porosity
  • Length adjustable
  • Tapered from proximal to distal
  • Better positioning
  • Flairing of the proximal segment improving exact placement
  • Anti-jump mechanism for the distal segment

Potential advantages

  • Better patency rate
  • Better clinical improvement
  • Better healing
  • Better endothelisation
  • Less anti-coagulation

Leuven University Hospital Animal Study (3 x 3 sheep, 6 months)

Leuven University Hospital Animal Study (3 x 3 sheep, 6 months)

100% tissue coverage of the stent.

1 month

60 – 80% coverage

3 months

80 – 100% coverage

6 months

100% coverage

This study demonstrates that lengthening the W-Stent by increasing skipped segments and reducing metallic

burden does not adversely affect the development of neointimal formation or cause migration.

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