Self-expanding stent for a medical device to be introduced into a cavity of a body, and method for its preparation
First Claim
1. A self-expanding stent for introduction into a human or animal body, comprising:
- a tubular body (1) which is radially expansible and retractable between a first diameter (d), corresponding to a compressed state of said stent, and a second diameter (D), greater than said first diameter (d), corresponding to a resting state of said stent, and is axially expansible and retractable between a first length, corresponding to said compressed state, and a second length, less than said first length, corresponding to said resting state,said tubular body being formed by plaited filaments (2, 3, 5,
6), with a first plurality of said plaited filaments (2,
3) being arranged adjacently side by side substantially continuously along substantially their entire lengths in a number at least equal to two and forming first multiple filaments (2,
3) wound along a first helicoid direction around a longitudinal axis (4) of the tubular body (1), anda second plurality of said plaited filaments (5,
6) being arranged adjacently side by side substantially continuously along substantially their entire lengths in a number at least equal to two and forming second multiple filaments (5,
6) wound along a second helicoid direction opposite to said first helicoid direction, each multiple filament wound in one of the said helicoid directions crossing multiple filaments wound in the other helicoid direction according to a plaited arrangement, whereinall of said first multiple filaments together cross all of said second multiple filaments on the same side of said second multiple filaments, and said first multiple filaments are not twisted around one another and said second multiple filaments are not twisted around one another.
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Abstract
A self-expanding stent for a medical device to be introduced into a cavity of a human body, is disclosed and includes a radially expandable and axially retractable tubular body (1), characterized in that the tubular body comprises first filaments (2, 3) which are arranged side by side in a number at least equal to two, wound along a first helicoid direction around a longitudinal axis (4) of the tubular body, and second flexible rigid filaments (5, 6) which are arranged side by side in a number at least equal to two, wound along a second helicoid direction opposite to the first, each multiple filament wound in one of the said directions crossing multiple filaments wound in the other direction according to a plaited arrangement. Methods for reproducibly forming the stent of the invention are disclosed.
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Citations
10 Claims
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1. A self-expanding stent for introduction into a human or animal body, comprising:
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a tubular body (1) which is radially expansible and retractable between a first diameter (d), corresponding to a compressed state of said stent, and a second diameter (D), greater than said first diameter (d), corresponding to a resting state of said stent, and is axially expansible and retractable between a first length, corresponding to said compressed state, and a second length, less than said first length, corresponding to said resting state, said tubular body being formed by plaited filaments (2, 3, 5,
6), with a first plurality of said plaited filaments (2,
3) being arranged adjacently side by side substantially continuously along substantially their entire lengths in a number at least equal to two and forming first multiple filaments (2,
3) wound along a first helicoid direction around a longitudinal axis (4) of the tubular body (1), anda second plurality of said plaited filaments (5,
6) being arranged adjacently side by side substantially continuously along substantially their entire lengths in a number at least equal to two and forming second multiple filaments (5,
6) wound along a second helicoid direction opposite to said first helicoid direction, each multiple filament wound in one of the said helicoid directions crossing multiple filaments wound in the other helicoid direction according to a plaited arrangement, whereinall of said first multiple filaments together cross all of said second multiple filaments on the same side of said second multiple filaments, and said first multiple filaments are not twisted around one another and said second multiple filaments are not twisted around one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification