2022年11月4日 · Flexibility is critical to the braided stent in curing vascular diseases, but there is no theoretical method to characterize its bending stiffness. In this paper, firstly based on the theory of mechanical spring, derivations of an explicit theoretical formula are made to calculate the bending stiffness of the braided stent.

2022年11月4日 · In this paper, firstly based on the theory of mechanical spring, derivations of an explicit theoretical formula are made to calculate the bending stiffness of the braided stent. The formula...

In this study, a braided wire stent was developed using Aba-qus=Explicit 6.10 (Dassault Syste`mes Simulia Corp., Providence, RI, USA), and its performance in a moderate stenosed artery was investigated and compared with its welded form. The braided Nitinol self-expandable ExpanderTM stent (Medi-corp S. A., Villers les Nancy, France) was studied.

The novel braided composite stent (BCS), woven with both nitinol wires and polyethylene terephthalate (PET) strips, were characterized and compared with the braided nitinol stent in the same weaving pattern. Finite element models simulating the stent compression and bending were developed to quantify its radial strength and longitudinal ...

Numerous techniques have been reported to help overcome difficult stent delivery. 1 These include the “buddy wire” technique, 2 using a stiffer wire, bending the wire, selecting a different stent, slightly inflating the balloon tip, using the anchor balloon technique, performing additional predilation, and changing sheath size or curvature. 1

2020年3月1日 · At present, the Supera® stent (Abbott Vascular, Santa Clara, CA) is the only commercially available wire braided stent for treatment in the lower peripheral vessels and initial clinical results show promise, with short- and medium-term follow-up data suggesting improved patency and reduced stent fracture rates compared to other commercially ...

2021年3月1日 · In this study, a computational framework was developed to predict the functional performance of bare and covered self-expanding wire braided stents, with a systematic evaluation on the effect of various braid and cover parameters presented.

2021年7月1日 · Analytical models are proposed to reduce the efforts during the design of innovative braided stents. Knowing radial rigidity of braided stents before production is fundamental for optimal design. Knowing diameter variation range due to forming process in braided stents before production is fundamental for optimal design.

In this work, the influence of five main design factors (number of nitinol wires, braiding angle, diameter of nitinol wire, thickness and stiffness of the PET strip) on the surface coverage, radial strength, and flexibility of the BCS were systematically studied using computational models.

Results: The reaction force and bending stiffness of the braided stent increased with the wire diameter, braiding density, and external stent diameter, while wire diameter resulted as the...