Patent ID: 8574262
Filing Date: 2013-11-05
Classification: A61B,A61F,A61M

Abstract:
1. A temporary revascularization device configured to immediately restore flow within a cerebral artery having an occlusive thrombus without distal embolic protection, comprising: an elongate member having a proximal end and a distal end; a self-expandable and reconstrainable scaffold having a proximal end and an open, non-filtering distal end, the proximal end of the scaffold being eccentrically coupled to the distal end of the elongate member with a plurality of tethers extending from a proximal end of the scaffold, the scaffold being adapted to radially self-expand from a non-expanded configuration to an expanded configuration upon unsheathing of the scaffold and to transition from the expanded configuration to the non-expanded configuration upon re-sheathing of the scaffold; wherein the scaffold is a nitinol tube comprising a generally cylindrical body having a plurality of open cells defined by struts and connected by bridges, wherein each strut has two ends, with each end connected to one of the bridges, wherein the proximal end of the scaffold comprises a tapered structure configured to facilitate re-sheathing of the scaffold and to facilitate unobstructed blood flow, wherein the scaffold has a length sufficient to at least partially span the thrombus, wherein the scaffold has a chronic outward force (COF) per unit length that does not decrease by more than 50% and is non-zero from a diameter of 1.5 mm to a diameter of 2.5 mm, wherein, in use, the scaffold is configured to at least partially span the thrombus within a cerebral artery in its non-expanded configuration within a microcatheter and then be unsheathed from the microcatheter, thereby causing the generally cylindrical body of the scaffold to self-expand and compress the thrombus against a luminal wall of the cerebral artery to restore blood flow through the cerebral artery; wherein said restored blood flow facilitates natural lysis of the thrombus; and wherein, as the thrombus lyses, the generally cylindrical body of the scaffold is configured to apply continuous radial pressure at the location of the thrombus, thereby further facilitating blood flow.