Devices for transcatheter prosthetic heart valve implantation and access closure
View Patent ↗Apparatus for use in conjunction with implanting a collapsible and re-expandable prosthetic heart valve in a patient by means that are less invasive than traditional open-chest, open-heart surgery. The apparatus may include a one-way valve for preventing blood from escaping from the patient's circulatory system when that system is entered to implant the prosthetic heart valve. The apparatus may include various forms of cutters for gaining access to the patient's circulatory system. The apparatus may include various forms of devices for quickly closing the access to the patient's circulatory system after the prosthetic heart valve has been implanted.
1. An apparatus for closing an aperture through a wall of a structure within a patient's circulatory system, comprising:
a solid central structure having an outer perimeter and a longitudinal axis;
a first portion operatively coupled to the central structure within the outer perimeter and transitionable between a collapsed condition and an expanded condition, the first portion being formed from a first web of interwoven wire strands, the first web extending radially outward from the longitudinal axis by a greater amount in the expanded condition than in the collapsed condition, and being configured to conform to an inner surface of tissue around the aperture when in the expanded condition; and
a second portion operatively coupled to the central structure within the outer perimeter and transitionable between a collapsed condition and an expanded condition, the second portion being formed from a second web of interwoven wire strands, the second web extending radially outward from the longitudinal axis by a greater amount in the expanded condition than in the collapsed condition, and being configured to conform to an outer surface of tissue around the aperture when in the expanded condition,
wherein the first portion is operatively coupled to the second portion within the outer perimeter of the central structure and the apparatus has a longer length when the first portion and the second portion are in the collapsed condition than when the first portion and the second portion are in the expanded condition.
2. The apparatus of claim 1 , wherein the first portion and the second portion are resiliently biased toward the expanded condition.
3. The apparatus of claim 1 , wherein the central structure is configured to substantially fill the aperture.
4. The apparatus of claim 1 , wherein the central structure is configured to hold the first portion against the inner surface of tissue around the aperture and to hold the second portion against the outer surface of tissue around the aperture.
5. The apparatus of claim 1 , wherein the first portion has a convex shape in the expanded condition as viewed from the second portion.
6. The apparatus of claim 1 , wherein the second portion has a concave shape in the expanded condition as viewed from the first portion.
7. The apparatus of claim 1 , wherein the first portion has a cup-like shape in the expanded condition.
8. The apparatus of claim 1 , wherein the first portion has an arcuate shape in the expanded condition.
9. The apparatus of claim 1 , wherein the first portion has the shape of an arcuate surface of a cylinder in the expanded condition.
10. The apparatus of claim 1 , wherein the first portion includes a plurality of members projecting radially outward from the longitudinal axis in the expanded condition.
11. The apparatus of claim 1 , further comprising a web of material assembled between the first portion and the second portion.
12. The apparatus of claim 11 , wherein the web of material comprises a fabric.
13. The apparatus of claim 11 , wherein the web of material comprises biological tissue.