Intraluminal medical device
First Claim
1. An intraluminal, blood filtering medical device configured to be positioned in a blood vessel within a body, said blood filtering medical device having a first, radially restrained configuration when in which said blood filtering medical device is insertable into said blood vessel by means of a rod extending through an implantation sheath and a second, radially expanded configuration when said blood filtering medical device is positioned within said blood vessel, said blood filtering medical device comprising:
- a head portion that is separate from said rod and said implantation sheath, anda first plurality of elongated, generally filiform legs extending in a first longitudinal direction from said head portion, said legs comprising first, distal leg portions and second, intermediary leg portions disposed between said first leg portions and said head portion,wherein the first leg portions of at least some of said legs comprise substantially solid, generally flattened surfaces which bear against the wall of said blood vessel when said blood filtering medical device is in said second, radially expanded configuration, said first leg portions being devoid of means of permanent adfixture of said blood filtering medical device to the wall of said blood vessel and the width of said generally flattened surfaces, taken in a direction orthogonal to both said first, longitudinal direction and the radial direction of said blood vessel, is greater than the maximum cross-sectional dimension of said second, intermediary leg portions.
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Accused Products
Abstract
The invention generally relates to an intraluminal medical device, that is to say a device intended to be implanted in a passage in the body. This device has a substantially "filiform" structure with elongated legs (11) which have no hooks for anchoring them to the passage. These legs comprise two portions (11a, 11b). The first portion (11a) which bears against the passage has a flattened and substantially solid surface. At right-angles to the main axis (13) of the device, the maximum dimension of the second portion (11b) is less than that of the first portion.
Application particularly to temporary/definitive filters.
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Citations
13 Claims
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1. An intraluminal, blood filtering medical device configured to be positioned in a blood vessel within a body, said blood filtering medical device having a first, radially restrained configuration when in which said blood filtering medical device is insertable into said blood vessel by means of a rod extending through an implantation sheath and a second, radially expanded configuration when said blood filtering medical device is positioned within said blood vessel, said blood filtering medical device comprising:
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a head portion that is separate from said rod and said implantation sheath, and a first plurality of elongated, generally filiform legs extending in a first longitudinal direction from said head portion, said legs comprising first, distal leg portions and second, intermediary leg portions disposed between said first leg portions and said head portion, wherein the first leg portions of at least some of said legs comprise substantially solid, generally flattened surfaces which bear against the wall of said blood vessel when said blood filtering medical device is in said second, radially expanded configuration, said first leg portions being devoid of means of permanent adfixture of said blood filtering medical device to the wall of said blood vessel and the width of said generally flattened surfaces, taken in a direction orthogonal to both said first, longitudinal direction and the radial direction of said blood vessel, is greater than the maximum cross-sectional dimension of said second, intermediary leg portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13)
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12. An intraluminal, blood filtering medical device to be implanted into a blood vessel through an implantation sheath to filter blood, said blood filtering medical device having a main axis and comprising:
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filtering means having elongated legs adapted to be deployed in the blood vessel into a temporary implantation state, in which the elongated leas are exposed for filtering blood, from a radially restrained state in which said elongated legs extend substantially parallel to the main axis and in which the elongated legs are housed within the implantation sheath, said elongated legs being devoid of means for permanent adfixture to the blood vessel and having first portions adapted to contact the wall of the blood vessel when the blood filtering medical device is implanted therein and second portions, the first portions of at least some of said elongated legs having substantially solid, generally flattened surfaces adapted to bear against the wall of the blood vessel, and means for maintaining the blood filtering medical device in place in relation to the blood vessel, said means for maintaining being configured to remain sheathed within said implantation sheath while said medical device is in said temporary implantation state and configured to be completely ejected from said implantation sheath to anchor said blood filtering medical device in position in said blood vessel when permanent implantation of said blood filtering medical device is desired.
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Specification