Stent and method for manufacturing the stent
First Claim
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1. A stent, comprising:
- struts joined together to form a series of helical turns and defining a circumference of the stent, a number of said struts in each of said turns being between 36 and 50, each of said struts having a strut length, the struts having first and second curved strut portions connecting adjacent straight strut portions, the second curved strut portions extending farther from the straight strut portions than the first curved strut portions; and
connecting bridges disposed between each of the series of helical turns, each connecting bridge having one bridge strut with first and second ends, the first bridge strut end connected directly to a second curved strut portion of one of the series of helical turns and the second bridge strut end connected directly to a second curved strut portion of an adjacent one of the series of helical turns, the connecting bridges having edges perpendicular to an axis of the stent,a ratio of a number of said struts around said circumference to said strut length being greater than 800 per inch.
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Abstract
A stent includes a stent body having a circumference and struts disposed helically about the circumference. Each of the struts has a strut length and a ratio of a number of the struts around the circumference to the strut length is greater than 800 per inch, in particular, over 1000 per inch. A method for manufacturing a helical stent includes the steps of providing a stent body with struts disposed about the circumference thereof in turns and with bridges connecting the struts in adjacent turns. The stent body is expanded and, thereafter, some of the bridges, in particular, sacrificial bridges, are removed.
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Citations
25 Claims
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1. A stent, comprising:
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struts joined together to form a series of helical turns and defining a circumference of the stent, a number of said struts in each of said turns being between 36 and 50, each of said struts having a strut length, the struts having first and second curved strut portions connecting adjacent straight strut portions, the second curved strut portions extending farther from the straight strut portions than the first curved strut portions; and connecting bridges disposed between each of the series of helical turns, each connecting bridge having one bridge strut with first and second ends, the first bridge strut end connected directly to a second curved strut portion of one of the series of helical turns and the second bridge strut end connected directly to a second curved strut portion of an adjacent one of the series of helical turns, the connecting bridges having edges perpendicular to an axis of the stent, a ratio of a number of said struts around said circumference to said strut length being greater than 800 per inch. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A stent, comprising:
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struts joined together to form a series of helical turns and defining a circumference of the stent, a number of said struts in each of said turns being between 36 and 50, the struts having first and second curved strut portions connecting adjacent straight strut portions, the second curved strut portions extending farther from the straight strut portions than the first curved strut portions; and connecting bridges disposed between each of the series of helical turns, each connecting bridge having one bridge strut with first and second ends, the first bridge strut end connected directly to a second curved strut portion of one of the series of helical turns and the second bridge strut end connected directly to a second curved strut portion of an adjacent one of the series of helical turns, the connecting bridges having edges perpendicular to an axis of the stent, said struts having an M-D Ratio of greater than 800 per inch. - View Dependent Claims (8, 9, 10, 11)
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12. A stent, comprising:
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struts joined together to form at least one helical turn and defining a circumference of the stent, a number of said struts in said at least one helical turn being between 36 and 50, the struts having first and second curved strut portions connecting adjacent straight strut portions, the second curved strut portions extending farther from the straight strut portions than the first curved strut portions; and connecting bridges disposed between the at least one helical turn and an adjacent helical turn, each connecting bridge having one bridge strut with first and second ends, the first bridge strut end connected directly to a second curved strut-portion of the at least one helical turn and the second bridge strut end connected directly to a second curved strut portion of the adjacent helical turn, the connecting bridges having edges perpendicular to an axis of the stent, each of said struts having a strut length of between approximately 600 microns and approximately 1200 microns, a ratio of a number of said struts around said circumference to said strut length being greater than 800 per inch. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A stent comprising:
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struts joined together to form at least one helical turn and defining a circumference of the stent, each of said struts having a strut length, the struts having first and second curved strut portions connecting adjacent straight strut portions, the second curved strut portions extending farther from the straight strut portions than the first curved strut portions; and connecting bridges disposed between the at least one helical turn and an adjacent helical turn, each connecting bridge having one bridge strut with first and second ends, the first bridge strut end connected directly to a second curved strut-portion of the at least one helical turn and the second bridge strut end connected directly to a second curved strut portion of the adjacent helical turn, the connecting bridges having edges perpendicular to an axis of the stent, a number of said struts in said at least one helical turn being between 36 and 50, a ratio of a number of said struts around said circumference to said strut length being greater than 800 per inch. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification