Patent ID: 6238332
Filing Date: 2001-05-29
Classification: A61N

Abstract:
A radiation device for a body lumen, comprising:a sheath to be disposed in the body lumen and having a guide wire passageway adapted to allow a guide wire to pass therethrough at a front part thereof and a sheath passageway extending throughout a substantial portion thereof, said sheath passageway being completely closed except a rear end of the sheath to prevent an outer material from entering into the sheath passageway except the rear end, andan elongated radiation member to be inserted into the sheath passageway, said radiation member including an outer member having a shield portion at a front part thereof formed of a plurality of radiation shielding annular members partly overlapping with respect to each other to have flexibility thereat, and an inner member slidably situated in the outer member and having a flexible radiation portion at a front part thereof, said inner member being arranged in the outer member such that when radiation is not required, the radiation portion is located inside the shield portion, and when radiation is required, the radiation portion is disposed outside the shield portion.