Full-field microscale strain measurements of a nitinol medical device using digital image correlation.

Computational modeling and simulation are commonly used during the development of cardiovascular implants to predict peak strains and strain amplitudes and to estimate the associated durability and fatigue life of these devices. However, simulation validation has historically relied on comparison with surrogate quantities like force and displacement due to barriers to direct strain measurement-most notably, the small spatial scale of these devices. We demonstrate the use of microscale two-dimensional digital image correlation (2D-DIC) to directly characterize full-field surface strains on a nitinol medical device coupon under emulated physiological and hyperphysiological loading.

The Triple Wire Technique for Delivery of Endovascular Components in Difficult Anatomy.

We describe a novel endovascular technique in which three 0.014″ guidewires are placed in parallel through a 0.035″ lumen catheter, in order to create a stiff platform to allow for delivery of 0.