Tandem independently inflatable/deflatable multiple diameter balloon angioplasty catheter systems and method of use
First Claim
1. A catheter for performing balloon angioplasty, comprising:
- an elongate, flexible catheter shaft having at least two lumens therein;
at least two relatively inelastic angioplasty balloons on said shaft, wherein said balloons are connected to separate lumens for independent inflation and deflation thereof, and each of said balloons has a proximal end, a distal end, and an inflatable portion, has a predetermined maximum inflated diameter, and is adapted to dilate a stenosis when inflated;
said balloons comprising;
a first balloon; and
a second balloon disposed at least in part proximally of said first balloon; and
an attachment site on said catheter shaft to which the proximal end of said first balloon or the distal end of said second balloon or both are attached, wherein one of said balloons is attached to permanently dispose a part of the inflatable portion thereof over said attachment site.
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Accused Products
Abstract
Disclosed is a catheter for performing balloon angioplasty having multiple independently inflatable/deflatable balloons thereon, each balloon having a different diameter. The balloons are capable of withstanding pressures in excess of 100 psi and are non-elastomeric and imperforate. Also disclosed is a method for performing balloon angioplasty by advancing a balloon catheter of the type disclosed into a stenosis inside a blood vessel, inflating a first balloon to partially dilate the stenosis, advancing a second balloon into the partially dilated stenosis, wherein the diameter of the second balloon is greater than the diameter of the first balloon, and inflating the second balloon to further dilate the stenosis. Also disclosed is a method for performing balloon angioplasty with a catheter of the type disclosed herein, by positioning a first balloon inside a first stenosis in a blood vessel and inflating a first balloon to dilate the first stenosis, and positioning a second balloon inside a second stenosis in a blood vessel and inflating the second balloon to dilate the second stenosis, wherein the diameter of the first balloon is different from the diameter of the second balloon. A third stenosis may be dilated with a third balloon on the catheter in a similar manner, where the third balloon has a diameter different from that of the other two balloons.
264 Citations
41 Claims
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1. A catheter for performing balloon angioplasty, comprising:
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an elongate, flexible catheter shaft having at least two lumens therein; at least two relatively inelastic angioplasty balloons on said shaft, wherein said balloons are connected to separate lumens for independent inflation and deflation thereof, and each of said balloons has a proximal end, a distal end, and an inflatable portion, has a predetermined maximum inflated diameter, and is adapted to dilate a stenosis when inflated; said balloons comprising; a first balloon; and a second balloon disposed at least in part proximally of said first balloon; and an attachment site on said catheter shaft to which the proximal end of said first balloon or the distal end of said second balloon or both are attached, wherein one of said balloons is attached to permanently dispose a part of the inflatable portion thereof over said attachment site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 32, 33, 35, 36, 37, 38, 39, 40, 41)
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13. A catheter for performing balloon angioplasty, comprising:
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an elongate, flexible catheter shaft having at least two lumens therein; at least two relatively inelastic angioplasty balloons on said shaft, wherein said balloons are connected to separate lumens for independent inflation and deflation thereof, and each of said balloons has an inflatable portion and a predetermined maximum inflated diameter and is adapted to dilate a stenosis when inflated; said balloons comprising; a first balloon; and a second balloon disposed at least in part proximally of said first balloon, wherein said balloons are attached to the catheter in an overlapping relationship with at least a part of said first balloon always axially coextensive with a part of said second balloon, and wherein the maximum inflated diameter of said second balloon is greater than that of said first balloon.
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14. A catheter for performing balloon angioplasty, comprising:
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an elongate, flexible catheter shaft having at least two lumens therein; at least two relatively inelastic angioplasty balloons on said shaft, wherein said balloons are connected to separate lumens for independent inflation and deflation thereof, and each of said balloons has a proximal end, a distal end, and an inflatable portion, has a predetermined maximum inflated diameter, and is adapted to dilate a stenosis when inflated; said balloons comprising; a first balloon; and a second balloon disposed at least in part proximally of said first balloon; and an attachment site on said catheter shaft to which the distal end of said second balloon is attached, wherein the proximal end of said first balloon is attached to the wall of said second balloon proximally of said attachment site and a part of the inflatable portion of said first balloon is permanently disposed over said attachment site. - View Dependent Claims (15, 16, 17, 18, 29, 34)
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19. A catheter for performing balloon angioplasty, comprising:
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an elongate, flexible catheter shaft having at least two lumens therein; at least two relatively inelastic angioplasty balloons on said shaft, wherein said balloons are connected to separate lumens for independent inflation and deflation thereof, and each of said balloons has a proximal end, a distal end, and an inflatable portion, has a predetermined maximum inflated diameter, and is adapted to dilate a stenosis when inflated; said balloons comprising; a first balloon; and a second balloon disposed at least in part proximally of said first balloon; and an attachment site on said catheter shaft to which the proximal end of said first balloon is attached, wherein the distal end of said second balloon is bonded to the wall of the first balloon distally of the proximal end of said first balloon, so that the inflatable portion of said first balloon is partially inside said second balloon and a part of the inflatable portion of said second balloon is permanently disposed over said attachment site. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 30, 31)
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28. A catheter for performing balloon angioplasty, comprising:
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an elongate, flexible catheter shaft having at least two lumens therein; at least three relatively inelastic angioplasty balloons on said shaft, wherein said balloons are connected to separate lumens for independent inflation and deflation thereof, and each of said balloons has a proximal end, a distal end, and an inflatable portion, has a predetermined maximum inflated diameter, and is adapted to dilate a stenosis when inflated; said balloons comprising; a first balloon; and a second balloon disposed at least in part proximally of said first balloon; a third balloon on top of the distal portion of said second balloon and the proximal portion of said first balloon, wherein the maximum inflated diameter of said third balloon is larger than the maximum inflated diameter of said second balloon, and wherein the proximal end of said third balloon is bonded to the wall of said second balloon and the distal end of said third balloon is bonded to the wall of said first balloon; and an attachment site on said catheter shaft to which the proximal end of said first balloon or the distal end of said second balloon or both are attached, wherein a part of the inflatable portion of said third balloon is permanently disposed over said attachment site.
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Specification