DOI | Trouver le DOI : https://doi.org/10.1117/12.874705 |
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Auteur | Rechercher : Dufour, M.L.1; Rechercher : Bisaillon, C.-E.1; Rechercher : Lamouche, G.1; Rechercher : Vergnole, S.1; Rechercher : Hewko, M.; Rechercher : D'Amours, F.1; Rechercher : Padioleau, C.1; Rechercher : Sowa, M. |
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Affiliation | - Conseil national de recherches du Canada
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Format | Texte, Article |
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Conférence | SPIE BiOS, January 22-24, 2011, San Francisco, CA, USA |
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Sujet | catheterized probes; coronary arteries; NURD; OCT; pullback force; blood vessels; catheters; friction; probes; tomography; torsional stress; tribology; heart |
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Résumé | The Industrial Material Institute (IMI) together with the Institute for Biodiagnostic (IBD) has developed its own optical catheters for cardiovascular imaging applications. Those catheters have been used experimentally in the in vitro coronary artery model of the Langendorff beating heart and in a percutaneous coronary intervention procedure in a porcine model. For some catheter designs, non-uniform rotational distortion (NURD) can be observed as expected from past experience with intra-vascular ultrasound (IVUS) catheters. A two-dimensional (2D) coronary artery test bench that simulates the path into the coronary arteries has been developed. The presence or absence of NURD can be assessed with the test bench using a custom-built cardiovascular Optical Coherence Tomography (OCT) imaging system. A square geometry instead of the circular shape of an artery is used to simulate the coronary arteries. Thereby, it is easier to visualize NURD when it is present. The accumulated torsion induced by the friction on the catheter is measured along the artery path. NURD is induced by the varying friction force that is balanced by the accumulated torsion force. The pullback force is measured and correlated with NURD observed in the 2D test bench. Finally, a model is presented to help understanding the mechanical constraint that leads to the friction force variations. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE). |
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Date de publication | 2011 |
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Maison d’édition | SPIE |
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Dans | |
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Série | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Numéro NPARC | 21271627 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 16a32864-1db0-4244-b3cb-a7688a49f847 |
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Enregistrement créé | 2014-03-24 |
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Enregistrement modifié | 2020-04-21 |
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