Profile reduction seal
The disclosure pertains to profile reduction seals associated with heart valve replacements which may reduce or eliminate paravalvular regurgitation and methods of fabricating such seals. The generally cylindrical multilayer seals of the disclosure include a crown-like end and reinforcing elements which facilitate compression of the seal and associated device by minimizing bunching of the seal as it enters a delivery system.
1. A profile reduction seal for a heart valve replacement comprising:
a multilayer, generally cylindrical seal body having a distal end, a proximal end, and a lumen therebetween;
a plurality of reinforcing grommets disposed and distributed proximate the proximal end of the multilayer, generally cylindrical seal body; and
a distal reinforcing band disposed proximate the distal end of the multilayer, generally cylindrical seal body;
wherein the plurality of reinforcing grommets are embedded between layers of the multilayer, generally cylindrical seal body.
2. The profile reduction seal of claim 1 , wherein the plurality of reinforcing grommets include one or more perforations, said one or more perforations extending through both the plurality of reinforcing grommets and the multilayer, generally cylindrical seal body.
3. The profile reduction seal of claim 1 , wherein distal reinforcing band includes a plurality of perforations, said plurality of perforations extending through both the distal reinforcing band and the multilayer, generally cylindrical seal body.
4. The profile reduction seal of claim 1 , wherein the multilayer, generally cylindrical seal body comprises a radially innermost outer layer comprising a polycarbonate and a polyurethane.
5. The profile reduction seal of claim 1 , wherein the multilayer, generally cylindrical seal body further comprises a radially outermost outer layer comprising a polycarbonate and a polyurethane.
6. The profile reduction seal of claim 1 , wherein the multilayer, generally cylindrical seal body comprises at least one inner layer disposed between a radially outermost outer layer and a radially innermost outer layer, said at least one inner layer disposed between the radially outermost outer layer and the radially innermost outer layer.
7. The profile reduction seal of claim 6 , wherein the at least one inner layer disposed between the radially outermost outer layer and the radially innermost outer layer has a modulus of elasticity less than the modulus of elasticity of the radially innermost outer layer and less than the modulus of elasticity of the radially outermost outer layer.
8. The profile reduction seal of claim 6 , wherein the at least one inner layer disposed between the radially outermost outer layer and the radially innermost outer layer has an elongation to break greater than the elongation to break of the radially innermost outer layer and greater than the elongation to break of the radially outermost outer layer.
9. The profile reduction seal of claim 1 , wherein the plurality of reinforcing grommets comprises a woven fabric.
10. The profile reduction seal of claim 1 , wherein the distal reinforcing band comprises a woven fabric.
11. The profile reduction seal of claim 1 , wherein the proximal end of the multilayer, generally cylindrical seal body comprises a plurality of alternating projections and recesses.
12. The profile reduction seal of claim 11 , wherein at least some of the plurality of reinforcing grommets are disposed within the plurality of projections of the proximal end of the multilayer, generally cylindrical seal body.
13. The profile reduction seal of claim 11 , wherein at least some of the plurality of reinforcing grommets are disposed within the multilayer, generally cylindrical seal body and proximate the recesses of the proximal end of the multilayer, generally cylindrical seal body.
14. The profile reduction seal of claim 11 , wherein at least some of the plurality of reinforcing grommets are disposed within the multilayer, generally cylindrical seal body and distal of the plurality of projections of the proximal end of the multilayer, generally cylindrical seal body and distal of the recesses of the proximal end of the multilayer, generally cylindrical seal body.
15. The profile reduction seal of claim 1 , wherein the multilayer, generally cylindrical seal body has an undulating transverse cross-section.
16. The profile reduction seal of claim 1 , wherein the multilayer, generally cylindrical seal body has a fluted transverse cross-section.