Importance

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Abstract

A laser light irradiation apparatus for medical treatment of living tissues, a preferred embodiment, comprises a laser light emitter and plurality of optical fibers. The fore end portion of each optical fiber is exposed to form an exposed light emitting core. The exposed cores are surrounded by a clad-material serving as the laser light emitter in order to reduce power loss of the laser light. Also, since there is no space between the emitting face of the optical fiber and the impinging face of the emitter, a cooling fluid is not required to pass through. The laser light is emitted from the emitter to irradiate uniformly against the tissues, and if desired, against the tissues having a broad area. Further, a guide wire and a lead wire detecting a temperature can extend coaxially through the emitter. Therefore, a perforation of a normal part of the blood vessel can be prevented. To provide a more uniform power level distribution of the laser light, the optical fibers at the base portions are twisted.

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First Claim