Back to results
US 4,955,895 AGranted
Vasodilating catheter
AssigneeTerumo Kabushiki Kaisha
InventorsYoshiaki Sugiyama, Kyuta Sagae
Life of this patent
Estimating the term…
Abstract
A vasodilating catheter is disclosed which is characterized by using a triple-flow catheter tube and allowing two of the three flow paths formed by the catheter tube to communicate with a balloon. Owing to this configuration, the air entrapped inside the balloon can be easily removed and, as the result, the otherwise inevitable degradation of the balloon's opacitying property is precluded and the angioplasty is performed with increased safety and ease.
Claims19
A vasodilating catheter, comprising:
- a triple-flow catheter tube having a leading end and a basal end, and comprising an inner tube opening at a leading end thereof and defining a first flow path, a middle tube encircling said inner tube and defining a second flow path jointly with said inner tube, and an outer tube encircling said middle tube and defining a third flow path jointly with said middle tube,
- an at least partially cylindrical foldable balloon attached to the outer periphery of said triple-flow catheter tube so as to enclose therewith openings of said second flow path and said third flow path in the proximity of the leading end of said triple-flow catheter tube and to form a space communicating with said second flow path and said third flow path, and
- three ports communicating with said three flow paths, attached to the basal end of said triple-flow catheter tube.
Dependencies are inferred from the claim text.