Patent ID: 9089424
Filing Date: 2015-07-28
Classification: A61F

Abstract:
1. A device for the surgical repair of an aortic valve of a patient, the aortic valve defining a valve axis and contained within a generally tubular aortic root, the aortic valve including a plurality of valve leaflets connected to the aortic root, the leaflets each having a free margin portion movable as a function of the different phases of the cardiac cycle between a first leaflet position in which the aortic valve is exposed to a diastolic phase of the cardiac cycle and in which the leaflet free margins are in an approximated spatial relationship to restrict blood flow through the aortic valve and a second leaflet position in which the aortic valve is exposed to a systolic phase of the cardiac cycle and in which the leaflet free margins are in a spaced apart relationship to allow blood flow through the aortic valve, said device comprising: an annular ring, said annular ring having a scalloped profile and being configured and sized for placement externally around said aortic root, said annular ring including three U-shaped members connected to each other at three crest fittings and arranged around a ring axis to form a closed-ring configuration, said U-shaped members each having a base portion and each having an upper portion adjacent said three crest fittings, said annular ring defining a first diameter proximate said base portion and constructed to allow circumferential movement of said base portions closer to one another such that said annular ring defines a second diameter proximate said base portion being smaller than said first diameter, one of said crest fittings being configured as a demountable crest fitting including two mating fitting members, said closed-ring configuration transformable into an open-ring configuration when said two mating fitting members are disassembled; and three annulus restraining brace members, wherein when said annular ring is in said closed-ring configuration each of said annulus restraining brace members extends between and couples a different pair of adjacent U-shaped members at a location proximate said base portions of said adjacent U-shaped members, one of said annulus restraining brace members being configured as a demountable brace member able to be decoupled from one of said U-shaped members in one of said pairs of adjacent U-shaped members in said open-ring configuration, said demountable annulus restraining brace member extending between the pair of adjacent U-shaped members joined at said upper portions by said demountable crest fitting; whereby, in use, when said annular ring is in said closed-ring configuration, under influence of the different phases of the cardiac cycle, said annulus-restraining brace members are constructed to: 1) allow inward displacement of said base portions of said U-shaped members toward said ring axis, the inward displacement occurring over a predetermined range without being controlled or modulated by said annulus-restraining brace members and resulting in circumferential movement of said base portions of said U-shaped members closer to one another, and 2) limits maximum displacement of said base portions of said U-shaped members away from said ring axis in order to constrain the maximum size of the aortic root so as to promote coaptation of the leaflet free margins during the diastolic phase of the cardiac cycle.