摘要:
A prosthetic device for replacing a deficient native aortic valve is disclosed, comprising: - a collapsible and expandable support stent formed of a shape memory alloy, - the support stent comprising a proximal stent portion (310) configured to expand to a first diameter and - an distal stent portion (320) configured to expand to a second diameter, the first diameter being smaller than the second diameter for preventing deformation of the mitral valve by over expansion and for providing a difference between the support stent and the openings of the coronary arteries; and - a collapsible and expandable valve assembly formed of natural tissue, whereby the valve assembly is attached to the support stent circumferentially along an inlet and sutured to the support stent along commissures for supporting the valve leaflets; wherein the first diameter of the support stent is sized for engagement with leaflets of the native aortic valve and the second diameter of the support stent is sized for engagement with the inner wall of the ascending aorta and wherein the stent is sized to avoid a contact with the inner wall of a left ventricle when implanted.
摘要:
A prosthetic device for replacing a deficient native aortic valve is disclosed, comprising: - a collapsible and expandable support stent formed of a shape memory alloy, - the support stent comprising a proximal stent portion (310) configured to expand to a first diameter and - an distal stent portion (320) configured to expand to a second diameter, the first diameter being smaller than the second diameter for preventing deformation of the mitral valve by over expansion and for providing a difference between the support stent and the openings of the coronary arteries; and - a collapsible and expandable valve assembly formed of natural tissue, whereby the valve assembly is attached to the support stent circumferentially along an inlet and sutured to the support stent along commissures for supporting the valve leaflets; wherein the first diameter of the support stent is sized for engagement with leaflets of the native aortic valve and the second diameter of the support stent is sized for engagement with the inner wall of the ascending aorta and wherein the stent is sized to avoid a contact with the inner wall of a left ventricle when implanted.
摘要:
A prosthetic heart valve for percutaneous implantation in a patient, comprising a proximal stent (310) for deployment in the aortic annulus of the patient, a distal stent (320) for deployment in the ascending aorta of the patient, and a tricuspid valve assembly made from pericardial tissue; wherein the valve assembly is mounted on the proximal stent, the proximal stent is joined to the distal stent, the proximal stent is at a predetermined distance from the distal stent, and the distal stent contains no valve.
摘要:
The present invention relates to a valve prosthesis suitable for implantation in body ducts, the device comprising: an expandable support frame; a valve assembly comprising a flexible conduit having an inlet and an outlet, the valve assembly made of pliant material forming a tricuspid valve assembly having three leaflets (430); and three pairs of parallel bars (480) for attaching the three leaflets to the support frame, wherein the leaflets (430) are held between the pairs of parallel bars.
摘要:
A prosthetic device for replacing a deficient native aortic valve is disclosed, comprising: - a collapsible and expandable support stent formed of a shape memory alloy, - the support stent comprising a proximal stent portion (310) configured to expand to a first diameter and - an distal stent portion (320) configured to expand to a second diameter, the first diameter being smaller than the second diameter for preventing deformation of the mitral valve by over expansion and for providing a difference between the support stent and the openings of the coronary arteries; and
- a collapsible and expandable valve assembly formed of natural tissue,
whereby the valve assembly is attached to the support stent circumferentially along an inlet and sutured to the support stent along commissures for supporting the valve leaflets; wherein the first diameter of the support stent is sized for engagement with leaflets of the native aortic valve and the second diameter of the support stent is sized for engagement with the inner wall of the ascending aorta and wherein the stent is sized to avoid a contact with the inner wall of a left ventricle when implanted.
摘要:
A prosthetic device for replacing a deficient native aortic valve is disclosed, comprising: - a collapsible and expandable support stent formed of a shape memory alloy, - the support stent comprising a proximal stent portion (310) configured to expand to a first diameter and - an distal stent portion (320) configured to expand to a second diameter, the first diameter being smaller than the second diameter for preventing deformation of the mitral valve by over expansion and for providing a difference between the support stent and the openings of the coronary arteries; and - a collapsible and expandable valve assembly formed of natural tissue, whereby the valve assembly is attached to the support stent circumferentially along an inlet and sutured to the support stent along commissures for supporting the valve leaflets; wherein the first diameter of the support stent is sized for engagement with leaflets of the native aortic valve and the second diameter of the support stent is sized for engagement with the inner wall of the ascending aorta and wherein the stent is sized to avoid a contact with the inner wall of a left ventricle when implanted.
摘要:
A valve prosthesis device suitable for implantation in body ducts, the device comprising an expandable support frame adapted to be initially crimped in a narrow configuration suitable for catheterization through the body duct to a target location and configured to be expanded to an expanded configuration in the target location, the support frame being provided with a plurality of longitudinally rigid support beams of fixed length; and a valve assembly comprising a flexible conduit having an inlet and an outlet, made of pliant material attached to the support beams providing collapsible slack portions of the conduit at the outlet, whereby when flow is allowed to pass through the valve prosthesis device from the inlet to the outlet the valve assembly is kept in an open position, whereas a reverse flow is prevented as the collapsible slack portions of the valve assembly collapse inwardly providing blockage to the reverse flow, characterized in that the support beams are provided with bores, the valve assembly is stitched to the support beams with thread or fiber through the bores and the outlet is tapered with respect to the inlet and the support frame at the outlet is wider in diameter than the pliant material forming the outlet.
摘要:
A prosthetic device for replacing a deficient native aortic valve is disclosed, comprising: - a collapsible and expandable support stent formed of a shape memory alloy, - the support stent comprising a proximal stent portion (310) configured to expand to a first diameter and - an distal stent portion (320) configured to expand to a second diameter, the first diameter being smaller than the second diameter for preventing deformation of the mitral valve by over expansion and for providing a difference between the support stent and the openings of the coronary arteries; and - a collapsible and expandable valve assembly formed of natural tissue, whereby the valve assembly is attached to the support stent circumferentially along an inlet and sutured to the support stent along commissures for supporting the valve leaflets; wherein the first diameter of the support stent is sized for engagement with leaflets of the native aortic valve and the second diameter of the support stent is sized for engagement with the inner wall of the ascending aorta and wherein the stent is sized to avoid a contact with the inner wall of a left ventricle when implanted.