The Journal of Japan Society for Laser Surgery and Medicine

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We examined the characteristics of vascular endoscopes which developed for percutaneous transluminal laser angioplasty under direct visual control, and an effect of laser irradiation to arteriosclerotic wall from a diagonal direction, and reported clinical experiences. The new types of vascular endoscopes (PF-25 CA and VEC type-C) with a channel through which laser fiber can passed were tested about depth of view and resolution. The depth of view ranged from 2 to 30mm with both too. The resolution ranged from 0.72 to 3.16LP/mm with PF-25 CA at 3 to 20mm in depth of view, and 1.38 to 5LP/mm with VEC type-C. The volume of crater irradiated diagonally was larger than irradiated vertically at the same laser energy. The volume of crater irradiated diagonally was approximately 1.22 times that irradiated vertically at 10J, and 1.56 times at 30J. We carried out the laser irradiation under direct visual control by the vascular endoscope in 10 clinical cases with arteriosclerosis of pelvis and lower limbs. The effect of the laser irradiation with the bare ended laser fiber tended to be locally limited, however it was possible to irradiate laser safely, and irradiation by the bare ended fiber can be used as an initial treatment befor irradiation with a ceramic tip to increase the effects of laser.

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