54 results about "Bioprosthetic mitral valve replacement" patented technology

Transcatheter mitral valve replacement is provided which includes a stabilizing stent portion for placement at a mitral annulus, with a narrowed waist portion to avoid significantly dilating the annulus, and expanded bulb portions at the atrial and ventricular ends to secure the device in position. A housing is attached to the stabilizing stent and reduces in diameter to a smaller tract portion where replacement valve leaflets are secured. The resulting smaller replacement mitral valve offers benefits including a lower introduction profile, yet fits and secures to the native annulus by the securing stent and housing. Expansion limiting elements can limit expansion of portions of self-expanding stent if desired, avoiding excessive mitral annulus dilation or providing a fixed diameter in other portions of the stent or housing. Two-step implantation can be accomplished by making the housing functional as a temporary valve.

A prosthetic device for use in an anatomical orifice or lumen of a patient includes an expandable first stent structure coupled to a valve support structure having at least one leaflet. The stent structure includes a collar provided with at least one groove or opening adapted to engage a tab extending from the valve support structure. Rotation of the stent structure and valve support structure relative to one another assembles the prosthetic valve device. The prosthetic valve device may be used for sutureless treatment of various valvular conditions such as aorta stenosis and mitral valve replacement.

The invention provides a split valve stent and an interventional mitral valve replacement system comprising the same. The split valve stent comprises an outer frame and an inner frame arranged in the outer frame and matched with the outer frame; the outer frame comprises a cylindrical outer metal frame with a kidney-shaped section, one end of the outer metal frame is folded outwards in the circumferential direction to form a supporting ring, and at least one hook is arranged at the kidney-shaped concave position of the other end of the outer metal frame; the inner frame comprises a cylindrical inner metal frame with a kidney-shaped section, two connecting wires which are crossed in an X shape are arranged at one end of the inner metal frame, and the interface of the end of the inner metal frame is cut into an 8 shape by the two connecting wires; and when the outer frame is in the unfolded state, the side, provided with the supporting ring, of the outer frame is reversely buckled to a valve ring on one side of the left atrium, the side, provided with the hook, of the outer frame extends into the left ventricle, and when the inner frame is in the unfolded state, the side, not provided with the connecting wire, of the inner frame faces the left atrium, and the side, provided with the connecting wire, of the inner frame extends into the left ventricle.