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Proceedings Paper

High-energy long duration frequency-doubled Nd:YAG laser and application to venous occlusion
Author(s): Laiming Zhang; Guilong Yang; Dianjun Li; Qipeng Lu; Huadong Gu; Linlin Zhu; Zhenwu Zhao; Xin Li; Yuguo Tang; Jin Guo
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Paper Abstract

Laser treatment represents an attractive option to other methods of vessel diseases especially varicose veins. A long pulse (30~50ms) 532nm laser (Fig.1) is used in our experiments with the pulse duration matching the thermal relaxation time of the vessels and the green laser matching the absorption spectrum peak of the blood. Laser irradiates nude vein vessels directly or exterior skin to finish operation faster and to acquire the practical data for upper enteron varicose vein treatment in several animal experiments performed in vivo. The 5J-energy pulse allows us to finely occlude rabbit or dog’s vein vessels up to 2 mm in diameter when irradiating them off external skin (Fig.2). Blood vessels are occluded at once and later biopsy specimens show the immediate and long-term lasting occlusion effect. While irradiating vessels directly (Fig.3), the vessels are usually irradiated to perforate, detailed causes are still under investigation. Animal experiments show long pulse green laser therapy is a safe and effective solution to the vein’s occlusion, which promises such laser with high energy of each pulse and 30~50 ms duration is an ideal candidate for vessel diseases treatment.

Paper Details

Date Published: 26 January 2005
PDF: 7 pages
Proc. SPIE 5627, High-Power Lasers and Applications III, (26 January 2005); doi: 10.1117/12.572368
Show Author Affiliations
Laiming Zhang, Changchun Institute of Optics, Fine Mechanics and Physics, CAS (China)
Guilong Yang, Changchun Institute of Optics, Fine Mechanics and Physics, CAS (China)
Dianjun Li, Changchun Institute of Optics, Fine Mechanics and Physics, CAS (China)
Qipeng Lu, Changchun Institute of Optics, Fine Mechanics and Physics, CAS (China)
Huadong Gu, Changchun Institute of Optics, Fine Mechanics and Physics, CAS (China)
Linlin Zhu, Changchun Institute of Optics, Fine Mechanics and Physics, CAS (China)
Zhenwu Zhao, Changchun Institute of Optics, Fine Mechanics and Physics, CAS (China)
Xin Li, Changchun Institute of Optics, Fine Mechanics and Physics, CAS (China)
Yuguo Tang, Changchun Institute of Optics, Fine Mechanics and Physics, CAS (China)
Jin Guo, Changchun Institute of Optics, Fine Mechanics and Physics, CAS (China)


Published in SPIE Proceedings Vol. 5627:
High-Power Lasers and Applications III
Dianyuan Fan; Ken-ichi Ueda; Jongmin Lee, Editor(s)

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