Patent ID: 9622859
Date: 2017-04-18
CPC Classifications: A61F

Claim:
1. A filter system for use in a body lumen, comprising: an elongate filter body having a tubular shaft including an expandable filter region attached at a distal end of the shaft defining a lumen extending from a proximal end of the tubular shaft toward a distal end of the filter region, the expandable filter region; and a valve defining a valve lumen and having a reversibly sealable opening for unidirectional flow of a fluid through the valve lumen, the valve fixedly attached to the expandable filter region of the elongate filter body, the valve including a frame having a first elliptical member and a second elliptical member meeting at an angle; wherein the frame is radially movable between a compressed state and an expanded state; wherein the expandable filter region filters the unidirectional flow of the fluid passing through the valve lumen and the expandable filter region in the expanded state.