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Yeungnam Univ J Med > Volume 12(2); 1995 > Article
Yeungnam University Journal of Medicine 1995;12(2):331-338.
DOI: https://doi.org/10.12701/yujm.1995.12.2.331    Published online December 31, 1995.
Laserthermia Induced Histological Changes in Different Thermal Condition.
Sang Woo Kim, Kyung Yup Lee, Seong Ho Kim, Jang Ho Bae, Oh Lyong Kim, Byung Yearn Choi, Soo Ho Cho
Abstract
Laserthermia is a new method of local hyperthermia using fiber optic guided probe with computer controlled Nd-YAG laser system. We used a synthetic sapphire probe and allowed irradiation with contolled low power laser energy (less than 5W), in different thermal condition (temprature:38.5-50 degrees C) for 10 minutes, in the normal brain tissue of 18 rabbits. In results, the histological changes of brain tissue was variable (myelin condensation, chromatin condensation, nuclear waving and palisading, RBC discoloration, cell necrosis) in microscopic findings after laser irradiation, but changing area was not occured proportionally in thermal condition level. Cell necrosis appears to over 44.5 degrees C and the distance was about 1.25 mm. This study, using computer controlled laserthermia system for interstitial local hyperthermia, may offer many advantages in the experimental treatment and clinical management of tumor. Minimizing normal tissue damage is now being developed.
Key Words: Laserthermia, Computer controlled system


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