Retrieval stent, retrieval device, and retrieval system

Abstract

The present invention provides a retrieval stent, retrieval device and retrieval system. The retrieval system includes the retrieval device, a delivery device and an aspiration device. The delivery device is able to load the retrieval device and deliver it to a target lesion site. The aspiration device can be connected to the delivery device and is used to apply a suction force through the delivery device to aspirate an occlusive object from the target lesion site. The retrieval device includes a core tube and the retrieval stent. The retrieval stent is disposed over an outer circumference of the core tube at a distal end thereof, and the retrieval stent is attached to the core tube through a proximal loading section. The retrieval stent is self-expandable and fabricated from a mesh tube. A portion of the mesh tube is folded toward an exterior of the retrieval stent to form a distal curved section of the retrieval stent, and the proximal loading section of the retrieval stent is provided by a non-folded portion of the mesh tube. The distal curved section includes an umbrella-shaped mesh surface that is concave toward a proximal end. More efficient and better treatment of a thrombus, stone or other occlusive object can be achieved.

Dependencies are inferred from the claim text.