Scoring device and treatment method
AssigneeTerumo Kabushiki Kaisha
InventorAkihiko Tarunaga
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Abstract
A scoring device includes an elongate shaft, a balloon disposed on a far side of the shaft and inflatable radially of the shaft by a fluid flowing into the balloon, at least one storage tube disposed along an outer surface of the balloon and having a storage lumen defined therein, and an elongate scoring wire storable in the storage tube and made of a harder material than the balloon. The storage tube is fixed to the balloon or the shaft, and an opening portion is defined in the storage tube to provide fluid communication between outer and inner circumferential surfaces of the storage tube along the storage lumen when the balloon is inflated. The scoring wire is movable in the storage lumen along a longitudinal axis of the storage tube.
Claims3
A treatment method comprising:
- inserting a balloon into a living body lumen until the balloon reaches a lesion area in the living body lumen, the balloon including at least one storage tube on an outer surface of the balloon;
- inflating the balloon;
- deflating the balloon;
- placing an elongate scoring wire made of a material that is harder than the balloon in a portion of the storage tube that is on the outer surface of the balloon;
- inflating the balloon to apply an outwardly directed force to the scoring wire to cause the scoring wire to score at least a portion of the lesion area;
- and
- dilating the lesion area with the inflated balloon.
Dependencies are inferred from the claim text.