Tools for experimental characterization of the non-uniform rotational distortion in intravascular OCT probes

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DOIResolve DOI: http://doi.org/10.1117/12.874705
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TypeArticle
Proceedings titleProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ConferencePhotonic Therapeutics and Diagnostics VII, 22 January 2011 through 24 January 2011, San Francisco, CA
ISSN1605-7422
ISBN9780819484208
Volume7883
Article number788339
Subjectcatheterized probes; Coronary arteries; NURD; OCT; pullback force; Blood vessels; Catheters; Friction; Probes; Tomography; Torsional stress; Tribology; Heart
AbstractThe 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).
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21271627
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Record identifier16a32864-1db0-4244-b3cb-a7688a49f847
Record created2014-03-24
Record modified2016-05-09
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