BIFURCATION POST-DILATATION BALLOON AND METHODS
First Claim
1. A catheter assembly, comprising:
- (a) a balloon member having a distal portion, a proximal portion, and a circumferential bulge portion, the circumferential bulge portion being positioned at a location between the proximal and distal portions of the balloon, the circumferential bulge portion extending around a circumference of the balloon; and
(b) a balloon restricting arrangement, the balloon restricting arrangement including;
i. a distal restricting member configured to restrict a radially outward expanded dimension of the distal portion of the balloon to a restricted distal inflated dimension; and
ii. a proximal restricting member configured to restrict a radially outward expanded dimension of the proximal portion of the balloon to a restricted proximal inflated dimension, the circumferential bulge portion of the balloon having a maximum inflated dimension that is greater than the restricted proximal inflated dimension and the restricted distal inflated dimension.
1 Assignment
0 Petitions
Accused Products
Abstract
A catheter assembly includes a balloon member and a balloon restricting arrangement. The balloon member includes a proximal portion, a distal portion and a circumferential bulge portion. The circumferential bulge portion extends around a circumference of the balloon member and is positioned at a location between the proximal and distal portions of the balloon member. The balloon restricting arrangement includes a proximal portion extending around the proximal portion of the balloon member and a distal portion extending around the distal portion of the balloon member to restrict an inflated size of the proximal and distal portions of the balloon member. The proximal and distal portions of the balloon restricting arrangement are spaced apart axially, and the circumferential bulge portion extends radially outward therebetween. The circumferential bulge portion inflates to a maximum inflated dimension that is greater than an inflated dimension of the proximal and distal portions of the balloon restricting arrangement.
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Citations
23 Claims
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1. A catheter assembly, comprising:
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(a) a balloon member having a distal portion, a proximal portion, and a circumferential bulge portion, the circumferential bulge portion being positioned at a location between the proximal and distal portions of the balloon, the circumferential bulge portion extending around a circumference of the balloon; and (b) a balloon restricting arrangement, the balloon restricting arrangement including; i. a distal restricting member configured to restrict a radially outward expanded dimension of the distal portion of the balloon to a restricted distal inflated dimension; and ii. a proximal restricting member configured to restrict a radially outward expanded dimension of the proximal portion of the balloon to a restricted proximal inflated dimension, the circumferential bulge portion of the balloon having a maximum inflated dimension that is greater than the restricted proximal inflated dimension and the restricted distal inflated dimension. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A balloon catheter, comprising:
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(a) a catheter shaft having a distal end portion and defining an inflation lumen; (b) a balloon member positioned at the distal end portion of the catheter shaft and in fluid communication with the inflation lumen, the balloon member including a distal portion, a proximal portion, and a circumferential bulge portion; and (c) a balloon restricting arrangement, the balloon restricting arrangement including; i. a distal restricting member configured to restrict a radially outward expanded dimension of the distal portion of the balloon to a restricted distal inflated dimension; and ii. a proximal restricting member configured to restrict a radially outward expanded dimension of the proximal portion of the balloon to a restricted proximal inflated dimension, the circumferential bulge portion of the balloon having a maximum inflated dimension that is greater than the restricted proximal inflated dimension and the restricted distal inflated dimension. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of expanding a stent with a post dilatation balloon catheter, the post dilatation balloon catheter including a balloon member and a balloon restricting arrangement, the balloon member having a proximal portion, a distal portion, and a circumferential bulge portion, the balloon restricting arrangement including a distal restricting member and a proximal restricting member, the distal restricting member being configured to restrict a radially outward expanded dimension of the distal portion of the balloon, and the proximal restricting member is configured to restrict a radially outward expanded dimension of the proximal portion, the circumferential bulge portion extending around a circumference of the balloon and having a maximum inflated dimension that is greater than the radially outward expanded dimension of the proximal and distal portions of the balloon, the method comprising:
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(a) positioning the circumferential bulge portion in the stent; and (b) inflating the balloon member, wherein the circumferential bulge portion expands a portion of the stent, and the proximal and distal portions of the balloon do not expand the stent. - View Dependent Claims (17)
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18. A method of treating a vessel bifurcation using a stent, a stent delivery catheter, and a post dilatation balloon catheter, the stent including a first portion and a second portion, the first portion of the stent having a strut density that is greater than a strut density of the second portion of the stent, the post dilatation balloon catheter including a balloon member and a balloon restricting arrangement, the balloon member having a proximal portion, a distal portion, and a circumferential bulge portion, the balloon restricting arrangement including a distal restricting member and a proximal restricting member, the distal restricting member is configured to restrict a radially outward expanded dimension of the distal portion of the balloon to a restricted distal expanded dimension, and the proximal restricting member is configured to restrict a radially outward expanded dimension of the proximal portion to a restricted proximal expanded dimension, the circumferential bulge portion extending around a circumference of the balloon and having a maximum inflated dimension that is greater than the restricted distal expanded dimension and the restricted proximal expanded dimension, the method comprising:
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(a) delivering the stent to the vessel bifurcation with the delivery catheter, the stent being positioned with the second portion of the stent in axial alignment with an opening into a branch vessel of the vessel bifurcation; (b) expanding the stent into engagement with the main vessel using the delivery catheter, the expanded stent having a maximum internal dimension; (c) positioning the balloon member of the post dilatation balloon catheter at least partially within the expanded stent with the circumferential bulge portion positioned in axial alignment with the second portion of the stent and the opening into the branch vessel; and (d) inflating the balloon member of the post dilatation balloon catheter, wherein the maximum inflated dimension of the circumferential bulge portion is greater than the maximum internal dimension of the stent to expand at least a portion of the second portion of the stent into the branch vessel. - View Dependent Claims (19, 20, 21)
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22. A method of treating a vessel bifurcation with a catheter assembly, the catheter assembly including a guidewire, a catheter branch, and a stent, the catheter branch including a balloon member having a main balloon portion and a bulge portion, the bulge portion extending around a circumference of the main balloon portion and positioned at a location between proximal and distal end portions of the main balloon portion, the bulge portion having a maximum diameter dimension that is greater than a maximum diameter dimension of the main balloon portion, the stent positioned on the balloon member in alignment with the bulge portion, the method comprising:
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(a) advancing the guidewire into a main vessel of the vessel bifurcation distally beyond an ostium of a branch vessel of the vessel bifurcation; (b) advancing the catheter branch and stent over the guidewire to the vessel bifurcation with the bulge portion of the balloon member axially aligned with the ostium of the branch vessel; (c) inflating the balloon member to expand at least a portion of the stent through the ostium into the branch vessel; (d) retracting the catheter branch proximally; (e) retracting the guidewire proximal of the ostium; (f) advancing the guidewire through the portion of the expanded stent and into the branch vessel; (g) advancing a post dilatation catheter over the guidewire and through the portion of the expanded stent; and (h) further expanding the portion of the stent with the post dilatation catheter.
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23. A method of treating a vessel bifurcation with a catheter assembly, the catheter assembly including a guidewire, a catheter branch, and a stent, the catheter branch including a balloon member having a main balloon portion and a bulge portion, the bulge portion extending around a circumference of the main balloon portion and positioned at a location between proximal and distal end portions of the main balloon portion, the bulge portion having a maximum diameter dimension that is greater than a maximum diameter dimension of the main balloon portion, the method comprising:
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(a) advancing the guidewire into a main vessel of the vessel bifurcation distally beyond an ostium of a branch vessel of the vessel bifurcation; (b) positioning the stent in the main vessel spanning the ostium; (c) expanding the stent into engagement with the main vessel; (d) advancing the catheter branch over the guidewire to the vessel bifurcation with the bulge portion of the balloon member axially aligned with the ostium of the branch vessel; (e) inflating the balloon member to expand at least a portion of the stent through the ostium into the branch vessel; (f) retracting the catheter branch proximally; (g) retracting the guidewire proximal of the ostium; (h) advancing the guidewire through the portion of the expanded stent and into the branch vessel; (i) advancing a post dilatation catheter over the guidewire and through the portion of the expanded stent; and (j) further expanding the portion of the stent with the post dilatation catheter.
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Specification