Terumo Kabushiki Kaisha

Yuuki Itou

Katsuhiko Shimizu

Yuuichi Tada

Kazuyuki Takahashi

A treatment device is disclosed for treatment of a living body lumen. The treatment device can include an optical fiber having an emitting part that emits laser light from a side circumferential surface. Two or more grooves are provided in the emitting part at places different in a longitudinal direction of the emitting part. The two or more grooves have two or more kinds of shapes and intensities of the laser light emitted from the grooves adjacent to each other are different. A maximum region of intensity of the laser light emitted from the emitting part is located on one end side relative to a center position in the longitudinal direction of the emitting part. The intensity of the laser light emitted from the emitting part on the other end side of the emitting part relative to a position of the maximum region decreases toward the other end side.

Treatment device and living body lumen treatment method

A laser light irradiation device is disclosed, which can include an optical guide having a columnar portion and transmitting laser light through the columnar portion; a reflecting portion having a reflecting surface that reflects the laser light transmitted through the optical guide; and a transmitting portion having a window part and disposed between the columnar portion of the optical guide and the reflecting portion in such a manner that one end of the transmitting portion is in contact with the columnar portion, the transmitting portion transmitting the laser light emitted from the columnar portion to the reflecting portion and transmitting the laser light reflected by the reflecting surface to cause the laser light to be radiated to an external through the window part. A diameter of the reflecting surface gradually becomes smaller as distance from a boundary between the transmitting portion and the reflecting portion increases.

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Hadano, Japan

Yuuki Itou