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Publication Number
US-10363043-B2
Publication Date
2019-07-30
Expiration Date
Abstract
An implant device can include a frame and a cover member for delivery to and occlusion of a target body vessel. The frame can include proximal and distal members, coupled by a link member structure, and can expand from a collapsed configuration to an expanded configuration. In the collapsed configuration, a first plane passes through the proximal member and a second plane passes through the distal member, and the link member extends substantially parallel relative to a longitudinal axis of the device. In moving to the expanded configuration, the first and second planes each move angularly, relative to the longitudinal axis, from the collapsed configuration by between about 10 degrees and about 170 degrees, and the link member foreshortens along the longitudinal axis to bias the proximal member toward the distal member.
Core Innovation
The document describes a minimally invasive occlusion/stenting implant for incompetent vessels comprising an expandable frame and a cover member. The frame includes a proximal loop and a distal loop coupled by first and second link members, and during expansion from a collapsed configuration to an expanded configuration, the link members rotate respective first and second planes relative to the longitudinal axis while also foreshortening along the longitudinal axis.
The rotation of the first and second planes occurs by between about 10 degrees and about 170 degrees, and the foreshortening is caused by a decrease in first and second radii of curvature. This foreshortening biases the proximal member/loop toward the distal member/loop, and in the expanded configuration the first and second link members can be symmetrical about a first plane passing through the longitudinal axis and each symmetrical about a second plane oriented perpendicular to the first plane.
The expandable frame is coupled to a cover member, including occlusion membranes/caps described as ePTFE or ePTFE-like covers. The document further provides delivery system concepts for delivering the expandable implant device to a target location in a body vessel, including needle/catheter delivery with image guidance and sequential release concepts.
Claims Coverage
The partial content provides two independent claims, each defining an expandable device for delivery to a target location in a body vessel with a frame and a cover member. Across the independent claims, the inventive focus is on the specific U-shaped link member geometry with shared bend axis and expansion behavior that rotates defined planes and decreases radii of curvature to foreshorten and bias a proximal loop toward a distal loop, plus inclusion of a cover member.
Expansion with shared bend axis U-shaped link members and plane rotation with foreshortening bias
An expandable device having a frame with proximal and distal loops and first and second U-shaped link members with a common bend axis; in an expanded configuration, the first and second planes each rotate angularly relative to the longitudinal axis by between about 10 degrees and about 170 degrees and the first and second radii of curvature decrease to cause the first and second U-shaped link members to foreshorten along the longitudinal axis to bias the proximal loop toward the distal loop; and a cover member coupled to the frame.
Expansion with foreshortening bias using generally straight-to-foreshortening U-shaped link members and plane rotation
An expandable device having a frame expandable from a collapsed configuration in which the first and second U-shaped link members are generally straight and straightened to extend substantially parallel relative to a longitudinal axis to an expanded configuration in which the proximal and distal loops rotate angularly relative to the longitudinal axis by between about 10 degrees and about 170 degrees and the first and second radii of curvature decrease to cause the first and second U-shaped link members to foreshorten along the longitudinal axis to bias the proximal loop toward the distal loop; and a cover member coupled to the frame.
The independent claims are directed to an expandable frame-and-cover device in which U-shaped link members sharing a common bend axis undergo expansion that rotates defined planes by about 10 degrees to about 170 degrees and decreases radii of curvature to foreshorten and bias the proximal loop toward the distal loop, with the frame coupled to a cover member.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Occlusion/stenting implant for incompetent vessels including varicose veins and incompetent venous perforators (superficial vein and deep vein context described).
Arteriovenous fistula (AVF).
Tumors.
Embolization.
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