Modeling of (coronary) laser-angioplasty

✍ Scribed by Martin J. C. van Gemert; Gert A. C. M. Schets; Edmond G. Stassen; Johannes J. Bonnier

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 773 KB
• Volume: 5
• Category: Article
• ISSN: 0196-8092
• DOI: 10.1002/lsm.1900050304

✦ Synopsis

A tirst attempt to describe (coronary) laser angioplasty is presented using simplitied but standard optical and thermal modeling of tissue in interaction with a laser. Ablation behavior of blood thrombi and plaque ha,j been approximated from numerical computations for various wavelengths representing the AT, Nd-YAG, and CO:, lasers. The overall results, in terms of calculated depth of ablation versus laser irradiation time, show a relatively fast initial process followed by a very slow one. The analysis suggests that a sequence of laser pulse-catheter tip tlushing should substantially increase the overall ablation velocity. The physics of threshold laser power and intluence of laser beam diameter is discussed. A comparison between experimental results is made when possible. Suggestions for further test experiments are made.