Share Email Print
cover

Proceedings Paper

Characterization of an in-vitro laser thrombolysis model
Author(s): Abram D. Janis; Abby N. Nyara; Kenton W. Gregory; Lisa A. Buckley
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Laser thrombolysis (LT) is under investigation as a safe and rapid therapy for arterial recanalization in acute embolic stroke. Clot formation is a complex process affected by many factors that lead to differences in strength and hemoglobin concentration between samples formed from whole blood. The strength of thrombus formed in vivo also varies with age. We have developed a reproducible and clinically relevant reconstituted clot model for the in vitro assessment of a laser thrombolysis system. Laser thrombolysis experiments were performed using a 577 nm 1 microsecond(s) ec pulsed dye laser at an energy of approximately 25 mJ and a repetition rate of 4 Hz. Laser ablation, tensile strength, scanning electron microscopic, and histological comparisons are made with other in vitro clot models. We have found that the tensile strength of this clot model is directly proportional to the fibrinogen concentration. Laser ablation and tensile pull test studies demonstrate that LT ablation efficiency (in (mu) g/mJ/pulse) is not significantly affected by differences in clot tensile strength. This agrees with previous studies using dye and gelatin. Our results provide support for the effective use of this laser thrombolysis system for the removal of clots of varied age and strength.

Paper Details

Date Published: 21 May 2001
PDF: 12 pages
Proc. SPIE 4244, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XI, (21 May 2001); doi: 10.1117/12.427833
Show Author Affiliations
Abram D. Janis, Oregon Medical Laser Ctr./Providence St. Vincent Medical Ctr. (United States)
Abby N. Nyara, Oregon Medical Laser Ctr./Providence St. Vincent Medical Ctr. (United States)
Kenton W. Gregory, Oregon Medical Laser Ctr./Providence St. Vincent Medical Ctr. (United States)
Lisa A. Buckley, Oregon Medical Laser Ctr./Providence St. Vincent Medical Ctr. (United States)


Published in SPIE Proceedings Vol. 4244:
Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XI
Lawrence S. Bass; David S. Robinson; Eugene A. Trowers; Kenton W. Gregory; Lou Reinisch; Kenneth Eugene Bartels; R. Rox Anderson; Reza S. Malek; Kenneth Eugene Bartels; Lloyd P. Tate; Abraham Katzir; C. Gaelyn Garrett; Timothy A. Woodward; Hans-Dieter Reidenbach; George M. Peavy; Lawrence S. Bass; C. Gaelyn Garrett; Michael D. Lucroy; Kenton W. Gregory; Abraham Katzir; Nikiforos Kollias; Michael D. Lucroy; Reza S. Malek; J. Stuart Nelson; George M. Peavy; Hans-Dieter Reidenbach; Lou Reinisch; David S. Robinson; Lloyd P. Tate; Eugene A. Trowers; Timothy A. Woodward, Editor(s)

© SPIE. Terms of Use
Back to Top