Patent ID: 6645224
Filing Date: 2003-11-11
Classification: A61B,A61F

Abstract:
A vascular filtration device for removing embolic material in body fluid flowing within a vessel, the vascular filtration device having a pre-deployment state and a deployment state, comprising:a guidewire having a longitudinal axis; and a filter assembly comprising: a tubular member, the guidewire extending through the tubular member and being rotatable relative to the tubular member; a filter frame coupled to the tubular member, the filter frame being collapsed and substantially adjacent the longitudinal axis of the guidewire in the pre-deployment state; and a filter supported by the filter frame, the filter having at least one inlet opening provided at a proximal end of the filter and a plurality of outlet openings towards a distal end of the filter, the outlet openings allowing the body fluid to flow through the filter but retaining embolic material within the filter, and the inlet opening being larger than any of the outlet openings; the tubular member extending substantially the entire length of the filter, the tubular member being adapted to be entirely inside the vessel in the deployment state, and in the deployment state the center of the inlet opening being offset from the longitudinal axis of the guidewire.