Development of flow measuring techniques to optimise stent designs

Closing the gap between in-vitro and in-vivo blood flow quantification using vector flow imaging in stents promoting swirling flow

Peripheral arterial disease (PAD) leads to the development of atherosclerotic plaques in the arteries. These may eventually cause stenosis or occlusion of the vessel, leading to intermittent claudication or critical limb ischemia, which can severely impact the quality of life and survival. Veryan has developed innovative technology to improve the performance of vascular stents by adopting the principle of biomimicry; developing structures that imitate those occurring naturally. The Veryan stent has a unique 3D helical geometry which imparts a gentle helical shape to the stented artery, thereby inducing swirling blood flow within the stented segment.

The aim of the current project is to perform in-vivo blood flow quantification in patients, using high frame rate contrast-enhanced ultrasound vector flow imaging (VFI) techniques. Prior to the in-vivo measurements the consortium will determine the accuracy of and optimise the VFI technique for capturing swirling flow using in-vitro models. Ultimately, this knowledge will be used to design stents for other peripheral vascular beds with the potential to enable endovascular techniques, thereby providing new treatment options to improve the quality of life, limb salvage and survival for PAD patients.

Summary

The prevalence of peripheral artery disease (PAD) continues to grow globally across all age groups. Blood flow patterns can influence the development of atherosclerosis and stent failure. By developing and optimising flow measuring techniques, this project will be a steppingstone in the optimisation of stent designs in the treatment of PAD.

Technology Readiness Level (TRL)

Time period

18 months

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