Apparatus and methods for delivering a stent into an ostium
First Claim
1. An apparatus for delivering a prosthesis into an ostium of a body lumen, comprising:
- an elongate member comprising a proximal end, a distal end sized for introduction into a body lumen, and first and second lumens extending between the proximal and distal ends, thereby defining a longitudinal axis;
a first expandable member on the distal end of the elongate member, the first expandable member comprising an interior communicating with the first lumen;
a second expandable member on the distal end of the elongate member, the second expandable member comprising an interior communicating with the second lumen; and
a prosthesis comprising a first portion surrounding the first expandable member and a second portion surrounding the second expandable member;
the second expandable member being expandable independently of the first expandable member for expanding the second portion to an enlarged condition while the first portion remains in a contracted condition, the first expandable member being expandable for expanding the first portion to an enlarged condition that is smaller than the second portion in its enlarged condition.
1 Assignment
0 Petitions
Accused Products
Abstract
Apparatus and methods are provided for delivering a stent into an ostium. The apparatus includes a catheter including a proximal end, a distal end, and proximal and distal balloons disposed adjacent one another on the distal end. The balloons are expandable independently of one another, and a stent is provided surrounding the balloons. During use, the distal end of the catheter is introduced into a main lumen, and the proximal balloon is inflated to flare a proximal portion of the stent. The distal end is then advanced into the ostium until the flared proximal portion contacts a wall of the main lumen surrounding the ostium. The distal balloon is inflated to expand a distal portion of the stent, e.g., to dilate a lesion within the branch and/or ostium. Thereafter, the balloons are collapsed, and the apparatus is withdrawn, leaving the stent within the ostium.
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Citations
34 Claims
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1. An apparatus for delivering a prosthesis into an ostium of a body lumen, comprising:
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an elongate member comprising a proximal end, a distal end sized for introduction into a body lumen, and first and second lumens extending between the proximal and distal ends, thereby defining a longitudinal axis;
a first expandable member on the distal end of the elongate member, the first expandable member comprising an interior communicating with the first lumen;
a second expandable member on the distal end of the elongate member, the second expandable member comprising an interior communicating with the second lumen; and
a prosthesis comprising a first portion surrounding the first expandable member and a second portion surrounding the second expandable member;
the second expandable member being expandable independently of the first expandable member for expanding the second portion to an enlarged condition while the first portion remains in a contracted condition, the first expandable member being expandable for expanding the first portion to an enlarged condition that is smaller than the second portion in its enlarged condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for delivering a prosthesis into an ostium of a body lumen, comprising:
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an elongate member comprising a proximal end, a distal end sized for introduction into a body lumen, and a longitudinal axis extending therebetween;
a first expandable member on the distal end of the elongate member, the first expandable member being expandable from a proximal end of the elongate member, the first expandable member comprising a length for receiving a first portion of a tubular prosthesis thereon; and
a second expandable member on the distal end of the elongate member adjacent the first expandable member, a portion of the second expandable member being attached to the first expandable member, the second expandable member being expandable from a proximal end of the elongate member independently of the first expandable member for expanding the second portion to an enlarged condition while the first portion remains in a contracted condition, such that, in an enlarged condition, the second expandable member defines a transverse surface adjacent the first expandable member for expanding a second portion of the prosthesis to a flared condition to facilitate placement of the prosthesis within an ostium. - View Dependent Claims (19)
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20. A method for implanting a prosthesis within an ostium extending from a main lumen into a branch lumen using an elongate member comprising first and second expandable members on a distal end of the elongate member, the prosthesis comprising first and second portions surrounding the first and second expandable members, respectively, the method comprising:
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directing the distal end of the elongate member into the main lumen;
expanding the second expandable member to cause the second portion of the prosthesis to expand transversely;
directing the distal end into the ostium until the expanded second portion contacts a wall of the main lumen surrounding the ostium and the first portion is disposed within the branch lumen;
expanding the first expandable member to expand the first portion of the prosthesis to contact a wall of the branch lumen;
collapsing the first and second expandable members; and
withdrawing the elongate member from the branch and main lumens, leaving the prosthesis with the first portion expanded within the branch lumen and the second portion contacting the wall of the main lumen surrounding the ostium. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for implanting a prosthesis within an ostium extending from a main lumen into a branch lumen using an elongate member comprising first and second expandable members on a distal end of the elongate member, the prosthesis comprising first and second portions surrounding the first and second expandable members, respectively, the method comprising:
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directing the distal end of the elongate member into the main lumen;
expanding the second expandable member to cause the second portion of the prosthesis to expand transversely;
directing the distal end into the ostium with sufficient force to cause the expanded second portion to engage a wall of the main lumen surrounding the ostium with the first portion disposed within the branch lumen;
expanding the first expandable member to expand the first portion of the prosthesis to contact a wall of the branch lumen; and
collapsing the first and second expandable members. - View Dependent Claims (31, 32, 33, 34)
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Specification