Balloons and balloon catheter systems for treating vascular occlusions
First Claim
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1. A balloon apparatus comprising:
- a balloon comprisinga conically tapering midsection when the balloon is in an expanded state;
a distal tapering portion tapering from a distal end of the midsection to a proximal end of a distal annular connection; and
a proximal tapering portion tapering from a proximal end of the midsection to a distal end of a proximal annular connection;
wherein proximal tapering portion has a wall thickness greater than the wall thickness of the distal tapering portion;
wherein the wall thickness of the proximal tapering portion tapers from the proximal annular connection to the proximal end of the midsection; and
wherein the wall thickness of the distal tapering portion tapers from the distal annular connection to the distal end of the midsection.
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Abstract
A balloon catheter system for the intraluminal advancement of conventional guidewires beyond partially or fully occluded or stenosed lesions in body passages, such as CTOs in the vasculature, is provided. Balloons are provided. In certain embodiments of the invention, a balloon having relatively thickened proximal tapers is provided. In certain embodiments of the invention, balloons having a tapered midsection are provided. The balloons are preferably useful with crossing balloon catheter systems. In certain embodiments of the invention, the balloons preferably reduce or minimize trauma to the vascular wall or wall of other body passage in which it is used.
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Citations
12 Claims
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1. A balloon apparatus comprising:
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a balloon comprising a conically tapering midsection when the balloon is in an expanded state; a distal tapering portion tapering from a distal end of the midsection to a proximal end of a distal annular connection; and a proximal tapering portion tapering from a proximal end of the midsection to a distal end of a proximal annular connection; wherein proximal tapering portion has a wall thickness greater than the wall thickness of the distal tapering portion; wherein the wall thickness of the proximal tapering portion tapers from the proximal annular connection to the proximal end of the midsection; and wherein the wall thickness of the distal tapering portion tapers from the distal annular connection to the distal end of the midsection. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A balloon catheter apparatus comprising:
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a hollow outer shaft; a hollow inner shaft within the hollow outer shaft and coaxially slideable with the hollow outer shaft; a balloon coupled at a distal end of the balloon to the hollow inner shaft by a distal annular connection and coupled at a proximal end of the balloon to the hollow outer shaft by a proximal annular connection, wherein the balloon further comprises; a conically tapering midsection when the balloon is in an expanded state; a distal tapering portion tapering from a distal end of the midsection to the distal annular connection; and a proximal tapering portion tapering from a proximal end of the midsection to the proximal annular connection; wherein the proximal tapering portion has a wall thickness greater than the wall thickness of the distal tapering portion; and wherein the midsection has a wall thickness less than the wall thickness of the distal tapering portion. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification