Patent ID: 7837701

Claim:
A vascular filtration device for removing embolic material in body fluid flowing within a vessel, the vascular filtration device having a pre-deployment state for delivery to a treatment site and a deployment state for filtering the body fluid flowing within the vessel, 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 and axially slidable relative to the tubular member; a filter coupled to the tubular member, the filter having at least one inlet opening provided towards a proximal end of the filter and a plurality of outlet openings, 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; a filter frame attached to the tubular member, the filter frame coupled to the filter in the deployment state to maintain the inlet opening open, the filter frame being collapsed towards the guidewire in the pre-deployment state; in the deployment state the center of the inlet opening being offset from the longitudinal axis of the guidewire; and in the deployment state, rotation or distal translation imparted to the guidewire is not imparted to the filter.