Two Component Straddle Heart Valve System
OwnerWilliam Joseph Drasler, William Joseph Drasler, IIinventors
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Abstract
A method for providing blood flow across a surface of a mitral stent-valve frame. A portion of the stent-valve frame is placed into the left atrium and into the left ventricle with a securement band located intermediate that is attached to either the annulus or to a second support frame that is placed initially and above the mitral annulus without affecting native leaflet function. Portions of the frame above the securement band allow blood flow radially inwards to reduce stagnation regions in the atrium or outwards below the securement band to help cleanse native leaflets.
Claims20
A method for placing a heart valve system within native heart valve tissues of a heart to replace native valve leaflet function and direct blood to flow within the heart, said method comprising,
- A. placing a first component frame that is expandable adjacent to the native heart valve tissues, said first component frame comprising a frame ring extending around a first component frame perimeter of said first component frame, said first component frame being expanded at a location above native valve leaflet cusps such that the native valve leaflet function is unaffected by placing said first component frame,
- C. placing an expandable second component having a second component frame that is expandable within a central lumen of said frame ring, expanding said second component frame to form an upstream portion of said second component frame extending upstream of said frame ring and a downstream portion of said second component frame extending downstream of said frame ring, said second component frame having replacement valve leaflets that form leaflet attachments to said second component frame to direct the blood to flow in a downstream direction, said leaflet attachments being crown-shaped attachments,
- D. wherein a covering is attached to a surface of said upstream portion at locations radially outwards from said leaflet attachments to said second component frame, said covering being further attached to a surface of said downstream portion at locations between said leaflet attachments of two neighboring leaflets of said replacement valve leaflets to said second component frame, said covering preventing the blood to flow across a wall of said second component frame.
A method for placing a heart valve system within native heart valve tissues of a heart to replace native valve function, said method comprising,
- A. placing a first component frame that is expandable comprising a frame ring that extends around a perimeter of said first component frame, said first component frame being placed at a location above native valve leaflet cusps, and expanding said first component frame such that native valve leaflet function is unaffected by placement of said first component frame,
- B. said first component having fixation elements configured to fixate said first component frame relative to the native heart valve tissues,
- C. activating said fixation elements to fixate said first component frame after said first component frame has been fully expanded, said fixation elements securing said first component frame to the native heart valve tissues,
- D. placing an expandable second component having a second component frame within a central lumen of said frame ring such that up to 85% of said second component frame extends upstream and at least 15% of said second component frame extends downstream of said frame ring, said second component frame having replacement valve leaflets that form leaflet attachments to said second component frame to direct blood flow in a downstream direction,
- E. wherein said second component frame makes contact with said first component frame to prevent movement relative to said first component frame.
A method for placing a heart valve system within native heart valve tissues of a heart to replace native valve leaflet function, said method comprising,
- A. placing a first component frame that is expandable comprising a frame ring extending along a perimeter of said first component frame, said first component frame being placed within the native heart valve tissues above native valve leaflet cusps and expanded into contact with the native heart valve tissues whereby native valve leaflet function is unaffected by said placement of said first component frame,
- B. said first component having fixation elements located on said first component frame, said fixation elements being configured to hold said first component frame to the native heart valve tissues, said fixation elements being inactivated to not touch the native heart valve tissues during expansion of said first component frame into full contact with the native heart valve tissues,
- C. activating said fixation elements after said first component frame has been fully expanded, said fixation elements securing said first component frame to the native heart valve tissues,
- D. placing a second component frame that is expandable within a lumen of said fixed ring, an upstream portion of said second component frame extending upstream of said frame ring and a downstream portion of said second component frame extending downstream of said fixed ring, said second component frame having replacement valve leaflets that form leaflet attachments to said second component frame to direct blood to flow in a downstream direction,
- E. wherein a covering is attached along a portion of said second component frame, said covering preventing the blood to flow across a wall of said second component frame, said covering being absent along at least some of said upstream portion of said second component frame at locations between said leaflet attachments.
Dependencies are inferred from the claim text.