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BY-NC-ND 4.0 license Open Access Published by De Gruyter September 7, 2017

Expansion characteristics of coronary stents in focal stenoses

  • Wolfram Schmidt EMAIL logo , Klaus-Peter Schmitz , Peter Behrens , Niels Grabow , Hüseyin Ince and Alper Öner


The presented experimental in vitro approach was designed to assess the expansion behavior of stent systems in a resistant focal stenosis model with respect to a potential dog-boning effect. Five different stent systems (nominal diameter 3.0 mm) were investigated. The focal stenosis was simulated by a stainless steel tube (ID ≤ 1.20 mm). Stent expansion was performed using a proprietary test device consisting of a test chamber with 37 °C water, 2-axis laser scanner and a pressure controller.

All stents could be properly expanded up to recommended maximum pressure (RBP). At nominal pressure (NP) maximum diameters ranged from 2.923 to 3.560 mm while at RBP the maximum diameters were 3.391 to 3.984 mm. Only minimal flaring of stent struts from the expanded balloon was observed. None of the stent systems failed under the extremely high stress at the edges of the focal stenosis.

Published Online: 2017-09-07

©2017 Wolfram Schmidt et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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