Semi-rigid annuloplasty ring and method of manufacturing
Inventors
Assignees
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Publication Number
US-11918467-B2
Publication Date
2024-03-05
Expiration Date
Abstract
Annuloplasty prosthesis device (1), which is suitable for remodeling a native annulus (2), comprises a body having the shape of at least one ring portion defining a longitudinal direction, coinciding with or locally parallel to the longitudinal development direction of said body; said portion (5) being opposite to said first arcuate section (4), and the body comprises a first arcuate section (4) and at least a second segment (5); said first arcuate section (4) is flexible in a first direction, locally transverse to the longitudinal direction, so as to be deformable under flexion along said first direction; said first arcuate section (4) defines a plane of storage substantially parallel both to the longitudinal direction and to the first direction; said at least a second section (5) is rigid under flexion in said plane of storage (XY); said second section (5) is flexible in a second direction (ZZ), transverse to the plane of storage, so as to be deformable under flexion along said second direction.
Core Innovation
An annuloplasty prosthesis device suitable for native annulus remodeling is provided with a body having a shape of at least one portion of a ring defining a longitudinal direction (X-X). The body includes a first arcuate segment and at least one second segment opposite the first arcuate segment, and the prosthesis can also have a saddle portion and be in a form of a closed ring or an open annular path.
The first arcuate segment is flexible in a first direction (Y-Y) along a lying plane (X-Y) substantially parallel to both the longitudinal direction (X-X) and the first direction (Y-Y), and is deformable in bending along the first direction (Y-Y). The at least one second segment is more rigid under flexion than the first arcuate segment in the lying plane (X-Y) and is flexible in a second direction (Z-Z) transverse to the lying plane (X-Y), so that the second segment is deformable in bending along the second direction (Z-Z).
The body is further configured in a form of a twisted band, so that a transverse orientation of the second segment is inclined by a twist angle (β) with respect to a transverse orientation of the first arcuate segment. In the described configurations, this twisted band structure supports directional selective flexibility resulting from the inclination between segment orientations, and the segment geometry can be realized by a twisted band where cross-sections of the first and second segments are mutually inclined by the twist angle.
Claims Coverage
The document includes one independent claim (clm-00001). It defines a ring-shaped annuloplasty prosthesis device for native annulus remodeling with directional selective flexibility produced by contrasting flexion rigidity in a lying plane (X-Y) versus transverse flexibility (Z-Z), and further specifies a twisted-band configuration relating segment orientations via a twist angle (β).
Directional selective flexibility for native annulus remodeling using first and second segments
A ring-shaped body for native annulus remodeling includes a first arcuate segment flexible in a first direction (Y-Y) and a lying plane (X-Y) substantially parallel to both the longitudinal direction (X-X) and the first direction (Y-Y). At least one second segment is more rigid under flexion than the first arcuate segment in the lying plane (X-Y) and is flexible in a second direction (Z-Z) transverse to the lying plane (X-Y), providing directional selective flexibility for guiding native annulus remodeling.
Twisted band with inclined transverse orientation between segment directions
The body is in a form of a twisted band, so that a transverse orientation of the second segment is inclined by a twist angle (β) with respect to a transverse orientation of the first arcuate segment.
Together, the independent claim coverage is centered on directional selective flexibility achieved by assigning different flexion characteristics to a first arcuate segment and at least one second segment in relation to the lying plane (X-Y) and a transverse direction (Z-Z), and on a twisted-band geometry that inclines the transverse orientation of the second segment by a twist angle (β) relative to the first segment.
Stated Advantages
Improved remodeling action.
Reduced stress concentration compared to hinges, grooves, or slits.
Continuous mechanical property contribution from the core/body.
Compact core.
Fewer parts.
Simpler manufacturing without loss of function.
Documented Applications
Guiding native annulus remodeling using an annuloplasty prosthesis device for native annulus, including applications referenced for atrioventricular valves such as mitral and tricuspid valves.
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