機能的レーザー照射器の開発(2) : 臨床用照射方向可変式レーザー照射器の試作

概要

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Since the irradiating beam direction in converntional medical laser handpieces is almostly fixed, the area of exposure to the laser beam is quite restricted to a limited part on the subject's surface and they are impossible to cover the whole area in a narrow field of operation. The authors have devised a new functional laser irradiator system, the irradiating beam direction is variable by means of altering the reflection angle of the laser beam with a rotary mirror. Based on the results of the fundamental experiments on the new laser irradiator, a prototype of the new laser irradiator being available for the Nd-YAG laser surgery was designed. This new laser irradiator uses a special cold mirror as the laser beam reflector. Since the reflectance of the mirror is more than 0.98 for infrared rays of the wavelength 1.06 μm, the temperature on the surface of the mirror did not rise above 8℃ during exposure to Nd-YAG laser of the output power 30 watt in continuous wave mode over 30 minutes. The sufficient clinical applicability of the new model of the functional laser handpiece for the ordinary Nd-YAG laser treatment has been confirmed in this experiment. The clinical application of this new laser irradiator has been proved that the laser handpiece was extremely advantageous in its clinical applications, particularly in a narrow field of operation such as a body cavity.
日本医療機器学会の論文
1990-03-01