CATHETER EQUIPPED WITH EXPANSIBLE MEMBERS.

摘要

This invention relates to a catheter equipped with expansible members comprising a first lumen whose tip is open; an inner tube having a second lumen extending in the tip direction of the first lumen; an outer tube having the tip thereof at a position recessed by a predetermined distance from the tip of the inner tube and forming a third lumen between it and the outer surface of the inner tube; a contractible or foldable expansible member having the tip portion fitted to the inner tube and the base end portion fitted to the outer tube, and communicating with the second lumen near the tip portion and with the third lumen near the base end portion; a first opening communicating with the first lumen and a second opening communicating with the second lumen that are disposed at the base end portions of the inner tube; and a third opening disposed at the base end portion of the outer tube and communicating with the third lumen.