Minimally invasive heart valve replacement
First Claim
Patent Images
1. An anchoring device for securing a percutaneously implantable replacement heart valve in an existing valve in the human heart, which device comprises:
- a framework of generally tubular shape which is constructed of shape-memory material and includes a central portion, a distal portion and a proximal portion that are integral with one another, said distal portion comprising a plurality of individually controllable distal linear arms which are each connected at only one end to said central portion and have a free opposite end, which distal linear arms evert as a result of temperature change and wrap around the free ends of native leaflets of a stenotic or malfunctioning valve to contact downstream surfaces of the valve leaflets,said proximal portion of said framework comprising a plurality of individually controllable, proximally extending proximal linear arms which are each connected at only one end to said central portion and have a free opposite end, which proximal linear arms are constructed to swing radially outward at their free ends toward said everted distal arms and contact upstream-facing surfaces of the native leaflets and secure said framework within the human heart valve, andsaid distal and proximal linear arms having means at each said opposite end which allows attachment of cords to individually control and retract each of said linear arms.
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Accused Products
Abstract
A replacement valve for implantation centrally within the orifice of a malfunctioning native heart valve. The valve is designed for minimally invasive entry through an intercostal opening in the chest of a patient and an opening in the apex of the human heart. The replacement valve includes either a separate anchor (11, 87, 111) or a combined anchor (67) that folds around the malfunctioning native valve leaflets, sandwiching them in a manner so as to securely anchor the replacement valve in a precise, desired location.
415 Citations
14 Claims
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1. An anchoring device for securing a percutaneously implantable replacement heart valve in an existing valve in the human heart, which device comprises:
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a framework of generally tubular shape which is constructed of shape-memory material and includes a central portion, a distal portion and a proximal portion that are integral with one another, said distal portion comprising a plurality of individually controllable distal linear arms which are each connected at only one end to said central portion and have a free opposite end, which distal linear arms evert as a result of temperature change and wrap around the free ends of native leaflets of a stenotic or malfunctioning valve to contact downstream surfaces of the valve leaflets, said proximal portion of said framework comprising a plurality of individually controllable, proximally extending proximal linear arms which are each connected at only one end to said central portion and have a free opposite end, which proximal linear arms are constructed to swing radially outward at their free ends toward said everted distal arms and contact upstream-facing surfaces of the native leaflets and secure said framework within the human heart valve, and said distal and proximal linear arms having means at each said opposite end which allows attachment of cords to individually control and retract each of said linear arms. - View Dependent Claims (2, 3, 4, 5, 6)
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7. The combination of a hollow delivery implement and an anchoring device, which combination comprises:
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a collapsible-expandable anchoring device having a framework of generally tubular shape which is constructed of shape-memory material and includes a central portion, a distal portion and a proximal portion that are integral with one another, said distal portion comprising a plurality of individually controllable distal linear arms which are each connected at only one end to said central portion and have a free opposite end with an opening through which a cord can be passed, which distal linear arms evert as a result of temperature change and wrap around the free ends of native leaflets of a stenotic or malfunctioning valve to contact downstream surfaces of the valve leaflets, and said proximal portion of said framework comprising a plurality of individually controllable, proximal linear arms which are each connected at only one end to said central portion and have a free opposite end with an opening through which a cord can be passed, said proximal linear arms being constructed to swing radially outward at their free ends toward said everted distal arms and contact upstream-facing surfaces of the native leaflets and secure said framework within the human heart valve, a hollow delivery implement for passage through a cannula inserted in the chest of a patient about the exterior surface of which the anchoring device is disposed, and a plurality of cords are routed through said hollow implement individually control the distal and proximal arms by passage through said openings at the end of each said linear arm and also control the expansion of the anchoring device as its shape-memory alloy material tends to revert to its desired “
memory”
shape upon warming to body temperature. - View Dependent Claims (8, 9, 10)
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11. A collapsed anchoring device for securing a percutaneously implantable replacement heart valve within the confines of an existing valve in the human heart that has become stenotic or malfunctioning following its insertion into the body via a catheter, which device comprises:
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a framework of generally tubular shape which is constructed of shape-memory material and includes a central portion, a distal portion and a proximal portion that are integral with one another, said distal portion comprising a plurality of individually controllable distal linear arms which are each connected at only one end to said central portion and which have openings at opposite free ends thereof through which cords can be passed, which distal linear arms evert as a result of temperature change and individually wrap around the free ends of native leaflets of a stenotic or malfunctioning valve to contact downstream surfaces of the valve leaflets, and said central portion being expandable radially outward within the orifice of the native valve as a result of its shape memory, and said proximal portion of said framework comprising a plurality of individually controllable, proximal linear arms which are each connected at only one end to said central portion and which have openings at opposite free ends through which cords can be passed, said proximal linear arms being constructed to swing radially outward at their free ends toward said everted distal linear arms and contact upstream-facing surfaces of the native leaflets and secure said framework within the human heart valve, whereby said distal and proximal linear arms are individually controllable via cords that are passed through said openings at said respective free ends thereof. - View Dependent Claims (12, 13, 14)
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Specification