The present invention relates to an obstruction device (10) including an obstruction disk (12) mounted on a shaft (14). disc (12) includes a membrane (24) attached to a peripheral frame (18). an anchor member (16) extends from a distal portion of the shaft (14). the shaft (14), the anchor member (16) and the peripheral frame (18) may together have a unitary construction made of a slanted slender member.
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