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Proceedings Paper

Fluid-core optical transmission for laser angioplasty
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Paper Abstract

Optically transparent fluids were investigated as a means of transmitting laser energy (LE) in laser angioplasty catheters as an alternative to fused silica fibers. A catheter was constructed which transmits LE through a flowing stream of iodinated contrast media. LE is launched into a stream of contrast media and is internally reflected by a lower index of refraction cladding-providing transmission efficiency of 75%. As the stream exits the catheter, blood acts as an optical cladding and allows transmission 1 cm distal to the catheter tip. The low pressure stream removes intervening blood and provides an atraumatic surface for light interaction with target tissues. Fluoroscopy of the contrast stream allows real-time visualization of the catheter, the site of LE delivery and distal vasculature. We conclude that a fluid-core laser angioplasty catheter can transmit high peak-power laser energy and offers simplicity, blood removal, improved flexibility and real-time imaging during intravascular LE delivery.

Paper Details

Date Published: 1 July 1990
PDF: 6 pages
Proc. SPIE 1201, Optical Fibers in Medicine V, (1 July 1990); doi: 10.1117/12.17531
Show Author Affiliations
Kenton W. Gregory, Wellman Labs. of Photomedicine, Harvard Medical School and Massachusetts General Hospital (United States)
R. Rox Anderson, Wellman Labs. of Photomedicine, Harvard Medical School and Massachusetts General Hospital (United States)


Published in SPIE Proceedings Vol. 1201:
Optical Fibers in Medicine V
Abraham Katzir, Editor(s)

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