Actas de congresos
Comparative Histologic Study Of Alterations In Rat Skeletal Muscles Due To Carbon Dioxide Laser With Varying Power But Constant Energy
Proceedings Of Spie - The International Society For Optical Engineering. , v. 3195, n. , p. 306 - 313, 1997.
The aim of our study was to compare biologic effects such as tissue damage and regeneration in rat skeletal muscle after CO 2 laser application with pulses of constant energy density, but with varying power and exposure time. We used three different laser conditions: 20 W × 0.5s, 10 W × 1.0s and 5.0 W × 2.0s, all having the same energy density (10 joules in a constant area). The animals were sacrificed immediately after laser application, and after 1, 4, 7, 15 and 21 days. Tissue damage produced by, the CO 2 laser with high power provokes more profound craters with less tissue damage at the margins, as shown by lesser tissue carbonization, fewer foreign body giant cell granulomas and less tissue fibrosis and, on the other hand, an accelerated regeneration of muscle tissue.3195306313Ossoff, R.H., Gonzalez, D.A., Werkhaven, J.A., New horizons for laser research in otolaryngology (1986) The Laser Guidebook, , Hill, M. GJacques, S.L., Laser-tissue interactions, photochemical, photothermal, and photomechanical (1992) Surgical Clinics of North America, 72 (3), pp. 531-558Polanyi, T.G., Laser physics (1983) Otolaryngologic Clinics of North America, 16 (4), pp. 753-784Nicola, E.M.D., (1984) Caracterização de Micro Lesões Produzidas por Laser CO 2. na Mucosa Oral de Cães, em Função da Variação de Parâmetros Intrínsecos do Equipamento, , Tese de Doutorado. Faculdade de Ciências Médicas da UNICAMP. Campinas - S.PFisher, J.C., The power density of a surgical laser beam: Its meaning and measurement (1983) Laser in Surgery and Medicine, 2 (4), pp. 301-315Mihashi, S., Jako, G.J., Strong, M.S., Laser surgery in otolaryngology: Interaction of CO2 laser and soft tissue (1976) Annals New York Academy of Sciences, 267, pp. 263-294Hall, R.R., Beach, A.D., Baker, E., Morison, P.C.A., Incision of tissue by carbon dioxide laser (1971) Nature, 232, pp. 131-132Tichý, M., Hubácek, J., Jansa, P., Tichá, V., Histological picture of healing of a CO2 laser wound (1987) Acta Universitatis Palackianae Olomucensis, 116, pp. 207-214Partovi, F., Izatt, J.A., Cothren, R.M., Kittrell, C., Thomas, J.E., Strikwerda, S., Kramer, J.R., Feld, M.S., A model for thermal ablation of biological tissue using laser radiation (1987) Laser in Surgery and Medicine, 7 (2), pp. 141-154Filmar, S., Jetha, N., McComb, P., Gomel, V., A comparative histologic study on the healing process after tissue transection (1989) Am. J. Obstet. Gynecol., 160 (5), pp. 1062-1067Kamat, B.R., Carney, J.M., Arndt, K.A., Stern, R.S., Rosen, S., Cutaneous tissue repair following CO2 laser irradiation (1986) Journal of Investigative Dermatology, 87 (2), pp. 268-271Bellina, J.H., Hemmings, R., Voros, J.I., Ross, L.F., Carbon dioxide laser and electrosurgical wound study with an animal model: A comparison of tissue damage and healing patterns in peritoneal tissue (1984) Am. J. Obst. Gynecol., 148 (3), pp. 327-334Tichý, M., Jansa, P., Hubácek, J., Tichá, V., Healing of experimental laser wound in striated muscle and adipose tissue (1988) Acta Universitatis Palackianae Olomucensis, 120, pp. 179-187