Implantable luminal devices
Inventors
Rudakov, Leon • Black, Andrew • Leopold, Andrew R. • Jensen, Kelly
Assignees
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Publication Number
US-9636116-B2
Publication Date
2017-05-02
Expiration Date
Abstract
An implant may include a frame and a cover to facilitate endoluminal vessel occlusion, selective release of embolic material toward a target region, and/or endoluminal stenting. The frame of the implant provides radial expansion properties to secure the cover within a body vessel. The cover and/or the frame can occlude flow of a fluid through the body vessel.
Core Innovation
The invention relates to endovascular occlusion implants and delivery systems that include a shape-set self-expanding and/or externally expanded filament or arm-based structure. The disclosed implant includes end regions and a central hub with an occlusive cover over an interior region, and the implant transitions between an expanded state and a compressed or relaxed state during delivery.
The document describes an implantable luminal device concept using a radially expandable frame and an occlusive cover for immediate endoluminal vessel occlusion and/or stenting. The described implant concept is configured for placement at a target location within a body lumen and includes radially expandable support frame structures, including helical coil and non-coil or symmetrical dual-wire frames, laminated overlapping helical members, and structures for occlusive covers.
The delivery system includes a catheter with a distal-tip carrier and a port, together with an expander and/or a control rod and retaining features that manage expansion and positioning. The delivery system includes inner protrusions and ratchet/pawl style retaining features and detachable pushers, and the implant can include a plurality of filaments and/or arms arranged with a serpentine pathway, prongs, connectors, and optional multi-implant flow occlusion using connectors, bands, or tethers.
A catheter distal-tip carrier is disclosed with a helical kerf that defines a flexible keyed coil, where a torsion state of the flexible keyed coil changes an engagement condition between opposing sides of the kerf. Torque causes the opposing kerf sides to engage and reduce a kerf gap or pitch, and the kerf profiles may include linear, undulating, triangular, sawtooth, or concave sequences to tailor engagement.
Claims Coverage
The partial content includes two independent claims. Each independent claim focuses on delivering an implant within a body lumen using an engaged configuration in which the implant is biased to a relaxed state and applies torque to a catheter to reduce a kerf-related or gap-related dimension between adjacent helical elements.
Catheter helical coil kerf reduction via implant-applied torque
A delivery assembly in which a catheter has a helical coil defined by a kerf between adjacent windings, where an implant biased to a relaxed state engages first and second end portions in an engaged configuration and applies torque to the catheter to reduce a width or pitch of the kerf between adjacent windings of the catheter coil.
Catheter helical filaments gap reduction via implant-applied torque
A delivery assembly in which a catheter has a plurality of filaments extending in a first helical direction, where an implant biased to a relaxed state engages first and second end portions in an engaged configuration and applies torque to the catheter to reduce a width or pitch of a gap between adjacent filaments.
Across the independent claims, the core inventive concept is an engaged delivery configuration that links a relaxed-state biased implant to catheter engagement at proximal and distal or first and second end portions and uses implant-applied torque to reduce a kerf width or pitch between adjacent coil windings or to reduce a gap width or pitch between adjacent filaments.
Stated Advantages
Documented Applications
TIPS procedures are explicitly referenced in connection with flow-regulating implant concepts for regulating flow resistance and aperture size.
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