Patent US2761928A successfully refreshed from Google Patents.
EP0806190A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An angioplasty stent
Assignee: Sorin Biomedica Cardio SpA
•
Filing: 1997-05-06
•
Granted: —
•
Expires: 2017-05-06
Abstract
Abstract An angioplasty stent comprises a body (1) constituted by a plurality of successive segments (2) connected in pairs by bridge means (3, 4) so that the successive segments can be oriented relative to one another for the purposes of bending of the body (1) in any direction (d) defined by a linear combination of respective orientation axes (x, y) defined by the bridge connection means (3, 4). During the radial expansion of the stent, the axial contraction of the segments (2) resulting from the opening-out of the respective loops is compensated by axial projection of the bridge elements (3, 4) from the respective concave portions. The wall of the body (1) comprises arms for supporting a lumen as well as regions which are selectively deformable during the expansion of the stent, the arms and the selectively deformable regions having different cross-sections and/or cross-sectional areas. At least one portion of the body may have a substantially reticular structure, the branches (2, 30) of which define geometrical figures identifiable as fractals.
Inventors
- 👤 Giovanni Rolando
- 👤 Paolo Gashino
- 👤 Franco Vallana
- 👤 Osvaldo Cerise
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 10:01
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61F2/915; A61F2/89; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/9155; A61F2002/91566; A61F2002/91575; A61F2230/00; A61F2230/0002
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
127 words
An angioplasty stent comprising a body (1) which has a generally tubular envelope and can be expanded in use from a radially contracted condition towards a radially expanded condition, characterized in that the body comprises a plurality of successive segments (2) connected in pairs by bridge means (3, 4; 30), each of the bridge means defining a connecting relationship between two of the said segments (2) with a capability for relative orientation identified by at least one respective orientation axis (x, y), so that the successive segments can be oriented relative to one another for the purposes of bending of the body (1) in any direction (d) defined by a linear combination of respective orientation axes (x, y) defined by the bridge connection means (3, 4; 30).
Claim 2
Dependent Claim
47 words
A stent according to Claim 1, characterized in that, in the body (1), adjacent segments (2) are interconnected by pairs of diametrally-opposed bridge elements (3, 4; 30) the line on which the diametrally-opposed bridge elements are aligned identifying the at least one respective orientation axis (x, y).
Claim 3
Dependent Claim
36 words
A stent according to Claim 1 or Claim 2, characterized in that the successive segments (2) are interconnected in sequence by bridge means (3, 4) which identify successive distinct orientation axes (x, y) in the sequence.
Claim 4
Dependent Claim
22 words
A stent according to Claim 3, characterized in that, in the sequence, the orientation axes (x, y) are perpendicular to one another.
Claim 5
Dependent Claim
23 words
A stent according to Claim 4, characterized in that the sequence is an ordered and alternating sequence of perpendicular orientation axes (x, y).
Claim 6
Dependent Claim
50 words
A stent according to any one of Claims 3 to 5, characterized in that the segments (2) are short in the general direction of the longitudinal axis (z) of the stent so that the successive orientation axes (x, y) in the sequence are disposed in close proximity to one another.
Claim 7
Dependent Claim
21 words
A stent according to Claim 6, characterized in that the segments (2) have lengths of the order of about 2 mm.
Claim 8
Dependent Claim
119 words
A stent according to Claim 1, characterized in that the bridge means extend consecutively along at least one generatrix of the body (1) so as to form at least one respective spine (30) constituted by successive loops which can be deformed in the sense of a variation of the length of the spine, so that each of the bridge means included in a respective spine (30) can perform, at the connection between two successive segments (2), a relative orientation about two distinct orientation axes (x, y), as a result of a bending of the bridge means and as a result of a variation of the length of the bridge means along the axes of the respective spine (30), respectively.
Claim 9
Dependent Claim
150 words
An angioplasty stent comprising a body (1) which has a generally tubular envelope and can be expanded in use from a radially contracted condition towards a radially expanded condition, characterized in that: - the body (1) comprises a plurality of generally annular segments (2), the wall of each segment (2) being defined by a plurality of loops (5, 6), and - at least some of the segments (2) are interconnected by bridge elements (3, 4; 30) extending in the general direction of the longitudinal axis (z) of the stent and having at least one end connected to the concave or inside portion (5) of a respective loop (6) so that, during the radial expansion of the stent, the axial contraction of the segments (2) resulting from the opening-out of the respective loops is compensated by axial projection of the bridge elements (3, 4; 30) from the respective concave portions (5).
Claim 10
Dependent Claim
58 words
A stent according to Claim 9, characterized in that the bridge elements (3, 4) have opposite ends aligned in the direction of the longitudinal axis (z) of the stent, and in that the two opposite ends are connected to respective concave portions (5) of respective loops of the two segments (2) connected by each bridge element (3, 4).
Claim 11
Dependent Claim
42 words
A stent according to Claim 9 or Claim 10, characterized in that all of the bridge elements (3, 4; 30) connecting respective pairs of segments (2) are connected, at least at one end, to the concave portion (5) of a respective loop.
Claim 12
Dependent Claim
34 words
A stent according to Claim 10 and Claim 11, characterized in that all of the bridge elements (3, 4) are connected at both of their opposite ends, to concave portions (5) of respective loops.
Claim 13
Dependent Claim
87 words
An angioplasty stent comprising a body (1) which has a generally tubular envelope and can be expanded in use from a radially contracted position towards a radially expanded condition in which the stent supports the wall of a lumen, characterized in that the wall of the body comprises arms (6) for Supporting the lumen, as well as regions (5) which are selectively deformable during the expansion of the stent, and in that the arms (6) and the selectively deformable regions (5) have different cross-sections and/or cross-sectional areas.
Claim 14
Dependent Claim
76 words
A stent according to Claim 13, characterized in that the wall of the body (1) comprises a plurality of loops each having a concave portion (5) from which two lateral arms (6) extend, and in that the concave portion (5) and the arms (6) differ in at least one of the cross-section and the cross-sectional area so that, during the radial expansion of the stent, the concave portion (5) and the arms (6) adopt different behaviours.
Claim 15
Dependent Claim
46 words
A stent according to Claim 14, characterized in that the arms (6) have a shape which is generally flattened in the general plane of the wall so that the outer faces of the arms (6) define respective broad support surfaces for the wall of the lumen.
Claim 16
Dependent Claim
23 words
A stent according to any one of Claims 13 to 15, characterized in that the concave portion (5) has a substantially circular cross-section.
Claim 17
Dependent Claim
30 words
A stent according to any one of Claims 13 to 16, characterized in that the wall of the body (1) is constituted essentially by at least one bent wire element.
Claim 18
Dependent Claim
21 words
A stent according to Claim 17, characterized in that the wall comprises adjacent portions of wire firmly connected to one another.
Claim 19
Dependent Claim
26 words
A stent according to Claim 18, characterized in that adjacent portions of wire are connected to one another by welding, brazing, gluing, crimping or combinations thereof.
Claim 20
Dependent Claim
118 words
An angioplasty stent comprising a body (1) which has a generally tubular envelope and can be expanded in use from a radially contracted condition towards a radially expanded condition, characterized in that: - the body (1) is constituted by a plurality of successive radially expandable segments (2) interconnected by bridge elements (30) extending substantially in the direction of the longitudinal axis (z) of the stent so that the bridge elements (30) are substantially unaffected by the radial expansion of the segments (2) and the bridge elements (30) are generally deformable in the direction of the longitudinal axis (z) so that the length of the stent (1) along the axis (z) can change substantially independently of the radial expansion.
Claim 21
Dependent Claim
34 words
A stent according to Claim 20 characterized in that the bridge elements are arranged along at least one spine (30) extending along a respective generatrix of the imaginary cylindrical envelope of the body (1).
Claim 22
Dependent Claim
15 words
A stent according to Claim 21, characterized in that there are two diametrally-opposed spines (30).
Claim 23
Dependent Claim
62 words
A stent according to any one of preceding Claims 20 to 22, characterized in that the bridge elements are arranged along at least one spine (30) extending along at least one respective generatrix of the imaginary cylindrical envelope of the body (1), the at least one spine (30) having a shape constituted by a succession of loops together defining a serpentine shape.
Claim 24
Dependent Claim
21 words
A stent according to Claim 23, characterized in that the at least one spine (30) extends along a generally sinusoidal path.
Claim 25
Dependent Claim
91 words
A stent according to Claim 23 or Claim 24, characterized in that each segment (2) is constituted by a succession of loops each comprising a concave portion (5) and two lateral arms (6) extending from the concave portion (5), and in that successive portions of the at least one spine (30) extend like bridges to connect pairs of adjacent segments (2), with adjacent portions of the at least one spine (30) extending to connect concave portions (5) of respective pairs of loops of adjacent segments without interruption of the serpentine path.
Claim 26
Dependent Claim
56 words
An angioplasty stent comprising a body (1) which has a generally tubular envelope and can be expanded in use from a radially contracted condition towards a radially expanded condition, characterized in that at least one portion of the body has a substantially reticular structure, the branches (2, 30) of which define geometrical figures identifiable as fractals.
Claim 27
Dependent Claim
24 words
A stent according to Claim 26, characterized in that the body is constituted entirely by branches (2, 30) defining geometrical figures identifiable as fractals.
Claim 28
Dependent Claim
50 words
A stent according to Claim 26 or Claim 27, characterized in that the body comprises a plurality of successive segments (2) connected in pairs by bridge means (30), and in that at least some of the segments (2) and the bridge means (30) define respective geometrical figures identifiable as fractals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.