Comparison of Mechanical Deformation Properties of Metallic Stents with Use of Stress-Strain Analysis

Physical Properties of Endovascular Stents: An Experimental Comparison

“…This is due to the fact that the angle between the struts of the Palmaz medium stent (4-9 mm, expanded diameter rec· ommendation) is wider in an ex· panded state of 8 mm diameter than the angle between the struts of the Palmaz Large stent (8-12 mm, expanded diameter recommen· dation) (22). This finding has al· ready been reported by Lossef and coworkers in 1994 (23). Small dif· ferences between hoop strength val· ues are likely to be caused by differ· ent experimental set-ups.…”

“…Small dif· ferences between hoop strength val· ues are likely to be caused by differ· ent experimental set-ups. Lossef and coworkers used an eccentric point load , whereas Schrader and Beyar used a hydrostatic pressure chamber (17,23). The hoop strength test that we used for balloon·ex· pandable stents and the radial force measurement of self·expanding stents using a Mylar loop exerted a circumferential stress.…”

“…This is probably the reason why many stainless·steal stents are cut from cannula. When an incomplete slent expansion or recoil of a single slent occurs, it is possible to implant an additional stent coaxially because there is an addition of stiffness (23). It remains unclear what the optimum radial resistance value might be.…”

MR imaging in the presence of vascular stents: A systematic assessment of artifacts for various stent orientations, sequence types, and field strengths

“…Although many experimental (1,2,7,9,12) and clinical studies (3,4,6) on stents have been published in the last several years, only a few studies have reported on MRI in the presence of stents of different materials and structures (13-18). Previous reports have focused on in vitro (13,14,16 -18) and animal (15) studies using particular settings, without systematic variations in imaging parameters.…”

Fracture of Cardiovascular Stents in Patients With Congenital Heart Disease

“…[54][55][56][57][58][59][60][61] A central element of preclinical testing of all stents and implantable medical devices is assessment of stress and fatigue-life. The US Food and Drug Administration has published an extensive guidance document summarizing recommended engineering tests for intravascular stents.…”