Device for the implantation and fixation of prosthetic valves

摘要

A device for the transvascular implantation and fixation of prosthetic heart valves having a self-expanding heart valve stent (10) with a prosthetic heart valve (11) at its proximal end is introducible into a patient's main artery. With the objective of optimizing such a device to the extent that the prosthetic heart valve (11) can be implanted into a patient in a minimally-invasive procedure, to ensure optimal positioning accuracy of the prosthesis (11) in the patient's ventricle, the device includes a self-expanding positioning stent (20) introducible into an aortic valve positioned within a patient. The positioning stent is configured separately from the heart valve stent (10) so that the two stents respectively interact in their expanded states such that the heart valve stent (10) is held by the positioning stent (20) in a position in the patient's aorta relative the heart valve predefinable by the positioning stent (20).

主权项

1. A valve prosthesis, comprising:
a self-expandable outer stent component including exactly three struts configured for placement between each of three respective portions of a native aortic valve and an aorta wall upon implantation of the valve prosthesis relative to the native aortic valve; a self-expandable inner stent component coupled to the self-expandable outer stent component at a distal end of the outer stent component configured to be positioned farther from a native heart than a proximal end of the outer stent component, at least a portion of the inner stent component being radially inward of the struts, the valve prosthesis configured to receive the three portions of the native aortic valve between the respective three struts and the inner stent component upon implantation of the valve prosthesis relative to the native aortic valve; and a prosthetic valve component coupled to the self-expandable inner stent component.