Balloon catheter and balloon arrangement method
AssigneeTerumo Kabushiki Kaisha
InventorsHiroshi Goto, Yasuo Kurosaki
Life of this patent
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Abstract
A balloon catheter and a method for arranging a balloon are disclosed, which are capable of suppressing the separation of a drug with which an outer surface of a balloon is coated. A balloon catheter in which a balloon with an outer surface coated with a drug is disposed to an inside of a protective tube, in which: the balloon includes a plurality of wing portions that protrude radially outward, and a plurality of base portions that are in contact with an inner tube; each of the plurality of wing portions include a wing distal end portion that is positioned on a protruding side, a wing proximal end portion that is connected to the base portion, and a wing middle portion that is positioned between the wing distal end portion and the wing proximal end portion.
Claims19
A balloon catheter comprising:
- a balloon with an outer surface coated with a drug;
- a protective tube in which the balloon in a state of being folded on an outer peripheral surface of a shaft of the balloon catheter is arranged to an inside of the protective tube;
- the balloon includes a plurality of wing portions that are bent toward a same direction in a circumferential direction of the shaft while protruding radially outward of the balloon, and a plurality of base portions that are in contact with the shaft;
- each of the plurality of wing portions includes a wing distal end portion that is positioned on a protruding side, a wing proximal end portion that is connected to the base portion, and a wing middle portion extending from the wing distal end portion to the wing proximal end portion;
- the wing distal end portion includes a wing distal end outer portion that is directed to a side of the protective tube, and a wing distal end inner portion that is directed to a side of the shaft, the wing distal end outer portion contacts an inner peripheral surface of the protective tube, and wherein the wing distal end inner portion including the drug on the outer surface of the balloon is separated from an adjacent wing portion;
- inner surfaces of the balloon contact each other to pleat the wing middle portion;
- the wing middle portion including a wing middle outer portion that is directed to the side of the protective tube, a wing middle inner portion that is directed to the side of the shaft, and wherein the wing middle inner portion is separated from the adjacent wing portion and an entirety of inner surfaces of the wing middle portion are in contact with one another;
- wherein each of the plurality of wing portions that are bent toward the same direction in the circumferential direction overlies and partially covers the adjacent wing portion;
- and
- the wing middle portion and the wing proximal end portion are separated from the inner peripheral surface of the protective tube.
Dependencies are inferred from the claim text.