Balloon catheter
AssigneeKaneka Corporation
InventorsMasahiro Kojima, Takahisa Hamabuchi
Life of this patent
Estimating the term…
Abstract
The balloon catheter includes: a shaft; and a balloon having a straight tube portion and a tapered portion, wherein the balloon has a wing-shaped portion and a protrusion on an outer surface, and a scattering intensity in each of the cross sections measured by laser Raman spectroscopy satisfies Expression (1): Ime>Ite (1) where Ime is Ia/Ib at a central part of a base end part of the protrusion on the straight tube portion, and Itc is Ia/Ib at a central part of a base end part of the protrusion on the tapered portion, Ia being a ratio of a peak intensity in the X direction to a peak intensity in the Y direction at a wavenumber of 1640 cm−1, Ib being a ratio of a peak intensity in the X direction to a peak intensity in the Y direction at a wavenumber of 1440 cm−1.
Claims10
A balloon catheter comprising:
- a shaft having a distal portion and a proximal portion;
- and
- a balloon located at the distal portion of the shaft and having a straight tube portion and at least one tapered portion, wherein
- the balloon has a wing-shaped portion, which has a wing shape, in a contracted state and has a protrusion on an outer surface, and in a cross section in a direction perpendicular to an axial direction of the straight tube portion and a cross section in a direction perpendicular to an axial direction of the tapered portion, a scattering intensity in each of the cross sections measured by laser Raman spectroscopy satisfies Expression (1):
- I
- mc
- >
- I
- tc
- (
- 1
- )
- where Imc is a value of Ia/Ib at a central part in a circumferential direction of a base end part of the protrusion on the straight tube portion, and Itc is a value of Ia/Ib at a central part in a circumferential direction of a base end part of the protrusion on the tapered portion,
- Ia being a ratio of a peak intensity at a wavenumber of 1640±10 cm−1 in a X direction to a peak intensity at a wavenumber of 1640±10 cm−1 in a Y direction, Ib being a ratio of a peak intensity at a wavenumber of 1440±10 cm−1 in the X direction to a peak intensity at a wavenumber of 1440±10 cm−1 in the Y direction, where a direction toward a center of the shaft from an apex of the protrusion is the Y direction and a direction perpendicular to the Y direction is the X direction.
Dependencies are inferred from the claim text.