Patent ID: 8672990
Filing Date: 2014-03-18
Classification: A61F,A61M

Abstract:
1. A medical device comprising: a catheter shaft having a distal portion and a proximal portion; an expandable member mounted on the distal portion of the catheter shaft, the expandable member comprising a distal end portion, a proximal end portion and a central portion positioned between the distal end portion and the proximal end portion, the expandable member having an expanded state and a contracted state and being expandable from its contracted state to its expanded state; a mesh member comprising a plurality of strands forming a mesh wherein the individual strands of the mesh cross other strands of the mesh, the mesh member surrounding the expandable member, having a first end and a second end, and being substantially free-floating over the expandable member, the mesh member being in the shape of a spiral having a single chirality, the mesh having an inner surface facing the catheter shaft, the inner surface being the entirety of the mesh that is facing the catheter shaft, wherein, when the expandable member is in its expanded state, the inner surface of the mesh at its greatest distance from the catheter shaft is disposed radially around the expandable member and the entirety of the inner surface of the mesh being in contact with and urged against the expandable member; and a restraining mechanism associated with the mesh member, wherein the restraining mechanism continuously applies a longitudinal biasing force on the mesh member when the expandable member is in its expanded state, the restraining mechanism having a first end fixed to the catheter shaft and second end connected to the first end of the mesh member, wherein the second end of the restraining mechanism and the first end of the mesh member are movable in a longitudinal direction relative to the catheter shaft and the first end of the restraining mechanism.