Clot retrieval device for removing occlusive clot from a blood vessel

Abstract

A clot retrieval device () for removing occlusive clot from a blood vessel comprises an inner elongate body () and an outer elongate body () at least partially overlying the inner elongate body (). The device also comprises an elongate member or shaft () having a proximal end which extends exterior of a patient so that a user can retrieve the stent-basket device and captured clot by retracting the shaft (). The outer elongate body () and the inner elongate body () are connected to the distal end of the shaft () and are expandable relative to the shaft () from a collapsed delivery configuration to an expanded deployed configuration. The outer elongate body () is expandable relative to the inner elongate body () to a radial extent which is greater than the radial extent of the inner body () in the deployed configuration. The stent-basket construction of the device creates a reception space () between the inner () and outer () to receive the target clot. The outer body () is configured to allow as much as possible of the clot to migrate through it into the internal reception space (). Housing the clot in this reception space rather than pinning it to the wall of the vessel means that the clot is under less compression and can thus be retracted at a lower force. The inner elongate body () and a distal capture net () protect the distal vascular bed from embolization.