Retrieval devices having protruding features for thrombectomy
Inventors
Fulkerson, John • Rizk, Isa • Mustapha, Jihad Ali • Jimenez, Jr., Teodoro S. • Lo, Patrick
Assignees
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Publication Number
US-11877762-B2
Publication Date
2024-01-23
Expiration Date
Abstract
A retrieval device can include inwardly facing protruding features that facilitate engagement and capture of a thrombus or other mass from a body lumen of a patient. The protruding features can deploy from a frame of the retrieval device to extend radially inwardly toward an opposing side of the frame. When deployed into a thrombus, the protruding features engage and urge the thrombus as the retrieval device moves to facilitate capture.
Core Innovation
The disclosed invention concerns a retrieval device for thrombus retrieval. The device includes a frame having interconnected struts that form vertices and is configured to expand from a collapsed configuration to an expanded configuration. The interconnected struts form gaps that allow movement of the struts toward and away from each other to facilitate transition between the collapsed and expanded configurations.
Protruding features extend from corresponding vertices and extend radially inward from the frame when the frame is in the expanded configuration. In one described configuration, the frame defines a lumen extending longitudinally through the frame and openings extending from an exterior of the frame to the lumen, with the protruding features extending longitudinally within the openings in the collapsed configuration and radially inward into the lumen in the expanded configuration.
The device further includes an anchor portion connected to a proximal end of the frame. The described protruding features contact the thrombus by contacting the thrombus with the protruding features extending radially inwardly, and the method includes positioning at least a portion of a delivery system at least partially across a thrombus, expanding the retrieval device outside the delivery device, engaging the thrombus while the retrieval device is in the expanded configuration, and retracting the retrieval device toward the delivery device.
Claims Coverage
The document contains three independent claims: a retrieval device, a retrieval device with lumen and openings behavior, and a method. Across these claims, the core inventive coverage is the expandable strut-frame with vertices and gaps enabling transition, coupled with inwardly radially extending protruding features, lumen and openings relationships in one claim, an anchor portion, and a method claim translating these structural elements into positioning, expansion, engagement, and retraction steps.
Expandable frame with vertices and gaps
A frame comprising struts configured to expand from a collapsed configuration to an expanded configuration, wherein the struts are connected to each other to form vertices and wherein the struts form gaps that allow the struts to move toward and away from each other to facilitate transition between collapsed and expanded configurations.
Radially inwardly extending protruding features from vertices
Protruding features each extending from a corresponding one of the vertices and radially inwardly from the frame when the frame is in the expanded configuration, wherein each of the gaps is on a side of the corresponding one of the vertices opposite a corresponding one of the protruding features and each of the gaps is defined by parallel edges of the struts on opposing sides of a corresponding one of the gaps.
Proximal anchor portion connected to the frame
An anchor portion connected to a proximal end of the frame.
Lumen and exterior-to-lumen openings with configuration-dependent protrusion
A frame comprising interconnected struts forming vertices and defining a lumen extending longitudinally through the frame and openings extending from an exterior of the frame to the lumen, wherein the interconnected struts have portions that form parallel edges to define a gap on a proximal side of a corresponding one of the vertices and to allow the interconnected struts to move toward and away from each other to facilitate transition between collapsed configuration and expanded configuration.
Collapsed-to-expanded protruding feature transition between longitudinal openings and radial inward lumen
Protruding features each extending from the frame on a distal side of the corresponding one of the vertices, wherein in the collapsed configuration the protruding features extend longitudinally within the openings, and in the expanded configuration the protruding features extend radially inwardly into the lumen.
Delivery-system positioning, expansion outside delivery device, thrombus engagement, and retraction
A method comprising positioning at least a portion of a delivery system at least partially across a thrombus, expanding a retrieval device outside of the delivery device, engaging the thrombus with the retrieval device while in the expanded configuration by contacting the thrombus with protruding features extending radially inwardly from the frame, and retracting the retrieval device toward the delivery device.
Overall, the claims focus on an expandable frame with interconnected struts forming vertices and gaps that enable collapsed-to-expanded transition, and protruding features that extend radially inward from the frame in the expanded configuration. One independent claim further ties this behavior to a frame lumen and openings that govern longitudinal versus radially inward protrusion states, and the method claim covers positioning across a thrombus, expanding outside the delivery device, engaging via inwardly extending protruding features, and retracting.
Stated Advantages
Documented Applications
No documented applications found
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