Apparatus and methods for delivering a stent into an ostium
First Claim
1. 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 first portion having a length greater than the second portion and comprising material that requires greater force to expand than the second portion, the method comprising:
- directing the distal end of the elongate member into the main lumen with the first and second portions in a contracted condition;
expanding the second expandable member to cause the second portion of the prosthesis to flare radially outwardly from the first portion within the main lumen while the first portion of the prosthesis remains in the contracted condition;
after expanding the second expandable member, directing the distal end into the branch lumen until the flared second portion contacts a wall of the main lumen surrounding the ostium and the first portion is disposed within the branch lumen;
after directing the distal end into the ostium, 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.
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.
97 Citations
16 Claims
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1. 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 first portion having a length greater than the second portion and comprising material that requires greater force to expand than the second portion, the method comprising:
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directing the distal end of the elongate member into the main lumen with the first and second portions in a contracted condition; expanding the second expandable member to cause the second portion of the prosthesis to flare radially outwardly from the first portion within the main lumen while the first portion of the prosthesis remains in the contracted condition; after expanding the second expandable member, directing the distal end into the branch lumen until the flared second portion contacts a wall of the main lumen surrounding the ostium and the first portion is disposed within the branch lumen; after directing the distal end into the ostium, 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 (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. 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 first portion having a length greater than the second portion and comprising material that requires greater force to expand than the second portion, the method comprising:
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directing the distal end of the elongate member into the main lumen with the first and second portions in a contracted condition; expanding the second expandable member to cause the second portion of the prosthesis to flare radially outwardly from the first portion within the main lumen while the first portion of the prosthesis remains in the contracted condition; after expanding the second expandable member, 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; after directing the distal end into the ostium, expanding the first expandable member to expand the first portion of the prosthesis to contact a wall of the branch lumen; after expanding the first expandable member to expand the first portion of the prosthesis, expanding the second expandable member further to expand the second portion of the prosthesis further; and collapsing the first and second expandable members. - View Dependent Claims (13, 14, 15, 16)
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Specification