Assessment of the trackability, flexibility, and conformability of coronary stents: A comparative analysis - Archive ouverte HAL
Article Dans Une Revue Catheterization and Cardiovascular Interventions Année : 2003

Assessment of the trackability, flexibility, and conformability of coronary stents: A comparative analysis

Résumé

The efficacy and safety of coronary stent implantation depend on the mechanical features of these devices when deployed in atheromatous lesions of various morphologies. We evaluated the trackability, flexibility, and conformability of 17 coronary stents using specific mechanical bench tests. The quantifications used a dynamometer for assessment of trackability (maximal strength) and flexibility (stiffness) and a 3D optical gauging machine for assessment of conformability (distance between stent and arterial wall in a curvature). The maximal strength (measuring the trackability) ranged respectively from 0.24 ± 0.06 and 0.38 ± 0.03 N (Seaquest) to 1.31 ± 0.42 and 1.34 ± 0.35 N (Carbostent), concerning respectively curvatures of 90° (P < 0.0001) and 135° (P < 0.0001). The stiffness (measuring the flexibility) ranged from 0.53 ± 0.16 (Seaquest) to 1.28 ± 0.10 N/mm (NIR Royal; P < 0.0001). The mean distance between stent and external curvature (external conformability) ranged from 0.15 ± 0.06 mm (S7) to 0.57 ± 0.4 mm (NIR Royal; P < 0.0001). The mean distance between stent and internal curve (internal conformability) ranged from 0.26 ± 0.13 (S7) to 0.44 ± 0.12 mm (S670; P < 0.0001). These results may influence the choice of a particular stent adapted to a specific coronary anatomy.

Mots clés

Dates et versions

hal-00092259 , version 1 (08-09-2006)

Identifiants

Citer

Régis Rieu, Paul Barragan, Vincent Garitey, Pierre Roquebert, Jean Fuseri, et al.. Assessment of the trackability, flexibility, and conformability of coronary stents: A comparative analysis. Catheterization and Cardiovascular Interventions, 2003, 59, n° 4, pp.496-503. ⟨10.1002/ccd.10583⟩. ⟨hal-00092259⟩
79 Consultations
0 Téléchargements

Altmetric

Partager

More