Optimizing flushing parameters in intracoronary optical coherence tomography: an in vivo swine study View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2015-08

AUTHORS

Melissa J. Suter, Manabu Kashiwagi, Kevin A. Gallagher, Seemantini K. Nadkarni, Nayan Asanani, Atsushi Tanaka, Gerard B. Conditt, Armando Tellez, Krzysztof Milewski, Greg L. Kaluza, Juan F. Granada, Brett E. Bouma, Guillermo J. Tearney

ABSTRACT

Intracoronary optical frequency domain imaging (OFDI), requires the displacement of blood for clear visualization of the artery wall. Radiographic contrast agents are highly effective at displacing blood however, may increase the risk of contrast-induced nephropathy. Flushing media viscosity, flow rate, and flush duration influence the efficiency of blood displacement necessary for obtaining diagnostic quality OFDI images. The aim of this work was to determine the optimal flushing parameters necessary to reliably perform intracoronary OFDI while reducing the volume of administered radiographic contrast, and assess the influence of flushing media choice on vessel wall measurements. 144 OFDI pullbacks were acquired together with synchronized EKG and intracoronary pressure wire recordings in three swine. OFDI images were graded on diagnostic quality and quantitative comparisons of flushing efficiency and intracoronary cross-sectional area with and without precise refractive index calibration were performed. Flushing media with higher viscosities resulted in rapid and efficient blood displacement. Media with lower viscosities resulted in increased blood-media transition zones, reducing the pullback length of diagnostic quality images obtained. Flushing efficiency was found to increase with increases in flow rate and duration. Calculations of lumen area using different flushing media were significantly different, varying up to 23% (p < 0.0001). This error was eliminated with careful refractive index calibration. Flushing media viscosity, flow rate, and flush duration influence the efficiency of blood displacement necessary for obtaining diagnostic quality OFDI images. For patients with sensitivity to contrast, to reduce the risk of contrast induced nephrotoxicity we recommend that intracoronary OFDI be conducted with flushing solutions containing little or no radiographic contrast. In addition, our findings show that careful refractive index compensation should be performed, taking into account the specific contrast agent used, in order to obtain accurate intravascular OFDI measurements. More... »

PAGES

1097-1106

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10554-015-0668-0

DOI

http://dx.doi.org/10.1007/s10554-015-0668-0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1011045591

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/25922149


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