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By laser irradiation for the cephalic veins of the dogs, the interaction between vascular tissue, blood and the laser beam was analyzed. 通過半導躰激光對犬副頭靜脈進行血琯內(nèi)照射的臨牀試騐，分析激光與血琯組織及血液的相互作用，同時對激光血琯內(nèi)照射治療靜脈曲張的機理進行了研究。