J.Jpn. Surg. Soc.. 90(9): 1585-1588, 1989
Report on the annual meeting
SURGICAL APPLICATION OF LOW-POWER LASER : EXPERIMENTAL STUDY, DEVELOPMENT OF EQUIPMENTS AND CLINICAL APPLICATION
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Department of Surgery, Sendai Hospital of East Japan Railway Company, Sendai, Japan Yoshimochi Kurokawa, Hiroshi Ouchi, Yoshio Taguchi*), Shozo Mori*), Yasuhisa Yamamoto**), Humio Inaba**), Itaru Ohara***) |
The developed device for microvascular anastomosis with semiconductor laser diode made of In-Ga-As-P was used to perform 15 end-to-end laser assisted microvascular anastomoses of carotid arteries in rabbits. In four of 7 cases which were irradiated with power output 50mW showed patency immediately after surgery with no wound distruption.
A new medical device with Ga-A1-As semiconductor laser diode was developed for pain relief. A double-blind evaluation of the test was initiated in 124 patients suffering from chronic inframmatory pain. Result is that of 63 patients irradiated laser, 45 (71％) were effective and of 61 cases not irradiated laser, 8 (13％) were relieved pain. The data were analyzed statistically by chi square, and criterion for statistical significance was the 0.01 level.
The spectral properties of lasere-excited fluorescence of three photosensitisers, namely tetracycline, hematoporphyrin free base and chlorin e6Na, taken up in human arterial intima were detected. Photosensitisers were administrated to resected human arteries for 2 hours in vitro. The main results are following : 1) Photosensitisers are comfirmed to be taken up in arterial intima and the fluorescence intensity decreases as the time goes on. 2) The fluorescence intensity from atheromatous plaque is usually stronger than that from normal region.
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