Device and method for placing a stent at the ostium of a blood vessel
First Claim
1. In combination a guiding catheter and an introducer sheath type of ostial stent positioner for facilitating the placement by an operator of the proximal end of a stent within ±
- 2 mm of the ostial plane of an artery that has an ostial stenosis, the positioner having a wire extending for most of its length that is attached to a cylinder that is within the guiding catheter, the cylinder also being attached to expandable distal legs that end with radiopaque feet that form a distal plane when they are pushed in a distal direction out of the distal end of the guiding catheter and against the interior wall of the aorta, the positioner being designed to be placed within the guiding catheter and being further designed for placement of the distal plane of the radiopaque feet to be substantially co-planar with the ostial plane of the artery when the guiding catheter is urged forward in a distal direction after the expandable distal legs have been expanded radially outward.
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Accused Products
Abstract
A first aspect of the present invention is an ostial stent positioner that has the form of a wire for most of its length and having a cylinder with expandable legs situated at the positioner'"'"'s distal end. The cylinder with its attached wire acts as an introducer sheath to introduce a stent delivery system with a stent into the artery that is to be stented. A second aspect of the present invention is a method for accurately placing a stent at the ostium of an artery that would have an ostial stenosis. Examples of such arteries that have ostial stenoses are the right and left main coronary arteries, a saphenous vein graft as used in coronary bypass surgery and the renal arteries. Each of these arteries has an ostium situated at the aorta.
11 Citations
17 Claims
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1. In combination a guiding catheter and an introducer sheath type of ostial stent positioner for facilitating the placement by an operator of the proximal end of a stent within ±
- 2 mm of the ostial plane of an artery that has an ostial stenosis, the positioner having a wire extending for most of its length that is attached to a cylinder that is within the guiding catheter, the cylinder also being attached to expandable distal legs that end with radiopaque feet that form a distal plane when they are pushed in a distal direction out of the distal end of the guiding catheter and against the interior wall of the aorta, the positioner being designed to be placed within the guiding catheter and being further designed for placement of the distal plane of the radiopaque feet to be substantially co-planar with the ostial plane of the artery when the guiding catheter is urged forward in a distal direction after the expandable distal legs have been expanded radially outward.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for placing the proximal end of a stent within an artery that has an ostial stenosis so that the stent'"'"'s proximal end is positioned within ±
- 2 mm of the artery'"'"'s ostial plane, the method including the following steps;
a) advancing an introducer sheath type of positioner that has an expandable distal legs within a guiding catheter with the expandable legs in an unexpanded state;
b) causing the expandable legs to expand in a region beyond the distal end of the guiding catheter;
c) urging the guiding catheter in a forward, distal direction so that a distal plane of the expanded legs is placed substantially co-planar with the ostial plane of the artery that has the ostial stenosis; and
d) positioning a stent within the stenosis of the artery so that the stent'"'"'s proximal radiopaque marker band is situated relative to the distal plane of the expanded legs of the positioner so that the stent'"'"'s proximal end is located within ±
2 mm of the ostial plane when the stent is deployed. - View Dependent Claims (14, 15, 16, 17)
- 2 mm of the artery'"'"'s ostial plane, the method including the following steps;
Specification