Removable lung reduction devices, systems, and methods
First Claim
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1. A device for limiting air flow in an air passageway in a lung, the device comprising:
- an elongated frame assembly for implantation in the lung, the elongated frame assembly comprising a proximal end and a distal end;
the elongated frame assembly further comprising a plurality of support members extending in a proximal direction from the distal end, each of the plurality of support members comprising a bent portion, the bent portion being positioned along a distal portion of each of the plurality of support members;
a flexible membrane overlying at least an outer surface of at least the distal portion of each of the plurality of support members including the bent portion;
a proximally positioned concave recess being defined at least in part by the plurality of support members and the flexible membrane, the proximally positioned concave recess comprising a proximally facing substantially circular opening, wherein the flexible membrane forms a smooth outer surface and the plurality of support members is positioned between the concave recess and the smooth outer surface;
at least one anchor being distally positioned relative to the flexible membrane;
the device defining an obstructing structure configured to be implanted into the air passageway upstream from a target region such that the device precludes air from flowing into the target region past the device while allowing air to flow out of the target region along a path between a portion of the flexible membrane and a wall of the air passageway.
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Abstract
An air passageway obstruction device includes a frame structure and a flexible membrane overlying the frame structure. The frame structure is collapsible upon advancement of the device into the air passageway, expandable into a rigid structure upon deploying in the air passageway and recollapsible upon removal from the air passageway. The flexible membrane obstructs inhaled air flow into a lung portion communicating with the air passageway. The device may be removed after deployment in an air passageway by recollapsing the device and pulling the device proximally through a catheter.
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Citations
9 Claims
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1. A device for limiting air flow in an air passageway in a lung, the device comprising:
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an elongated frame assembly for implantation in the lung, the elongated frame assembly comprising a proximal end and a distal end; the elongated frame assembly further comprising a plurality of support members extending in a proximal direction from the distal end, each of the plurality of support members comprising a bent portion, the bent portion being positioned along a distal portion of each of the plurality of support members; a flexible membrane overlying at least an outer surface of at least the distal portion of each of the plurality of support members including the bent portion; a proximally positioned concave recess being defined at least in part by the plurality of support members and the flexible membrane, the proximally positioned concave recess comprising a proximally facing substantially circular opening, wherein the flexible membrane forms a smooth outer surface and the plurality of support members is positioned between the concave recess and the smooth outer surface; at least one anchor being distally positioned relative to the flexible membrane; the device defining an obstructing structure configured to be implanted into the air passageway upstream from a target region such that the device precludes air from flowing into the target region past the device while allowing air to flow out of the target region along a path between a portion of the flexible membrane and a wall of the air passageway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification