Percutaneous angioscopy after excimer laser angioplasty

Fumitaka Nakamura M.D.; Jan Kvasnicka; Herbert J. Geschwind M.D.; Yasumi Uchida M.D.

doi:10.1117/12.137313

28 August 1992 Percutaneous angioscopy after excimer laser angioplasty

Fumitaka Nakamura M.D., Jan Kvasnicka, Herbert J. Geschwind M.D., Yasumi Uchida M.D.

Proceedings Volume 1642, Diagnostic and Therapeutic Cardiovascular Interventions II; (1992) https://doi.org/10.1117/12.137313
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

Angioscopy has proved to provide more detailed information on lesion morphology before and after interventional procedures than angiography. Therefore, to evaluate the effects of laser angioplasty, angioscopy was performed in five patients with peripheral or coronary vascular disease who underwent excimer laser angioplasty. The excimer laser was operated at 308 nm, 135 nsec, 25 Hz, and 40 - 60 mJ/mm² and was coupled into multifiber wire-guided catheters of 1.4 to 2.0 mm diameter for coronary lesions and 2.2 mm for peripheral lesions. There were three coronary (one left anterior descending, one circumflex, one right coronary artery) and two peripheral (one common iliac artery, one superficial femoral artery) lesions. Angioscopy was successfully performed before and after laser ablation without any complications in all five lesions. The characteristics of angioscopic findings after excimer laser angioplasty consisted of flaps, fractures of plaques, and abundant tissue remnants. There was no apparent thermal injury. Recanalized channels were small and irregular. These results indicate that (1) angioscopy is effective and safe for evaluation of lesion morphology after laser angioplasty, (2) laser ablation does not result in thermal injury, and (3) irregular channels after recanalization and abundant tissue remnants may explain the suboptimal results after laser angioplasty.

Citation Download Citation

Fumitaka Nakamura M.D., Jan Kvasnicka, Herbert J. Geschwind M.D., and Yasumi Uchida M.D. "Percutaneous angioscopy after excimer laser angioplasty", Proc. SPIE 1642, Diagnostic and Therapeutic Cardiovascular Interventions II, (28 August 1992); https://doi.org/10.1117/12.137313

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KEYWORDS

Excimer lasers

Laser therapeutics

Angiography

Arteries

Laser tissue interaction

Laser ablation

Injuries

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