Stent deformations in the common iliac and iliofemoral veins as a result of hip flexion and extension

Stents implanted in the common iliac and iliofemoral veins exhibit greater deformation during high hip flexion and hyperextension, respectively, and iliofemoral venous stents interact with the superior ramus of the pubis during hyperextension. This suggests that device fatigue could be influenced by the type and level of patient physical activity, as well as anatomic positioning, opening up the potential benefit of activity modification and careful implantation strategy. The proximity of maximum diametric and bending deformations means that simultaneous multimodal deformations need to be considered for device design and evaluation.