Peripheral sealing venous check-valve

A valve implant for placement within a patient, comprising:

• a set of resiliently deformable struts, the struts each having respective proximal and distal ends and a middle portion, the middle portions and distal ends of the struts flaring outward with respect to each other so that the struts together have a generally bulbous aspect, wherein the struts have a first open configuration toward which the struts are biased and are resiliently bendable to a second configuration in which the distal ends of one or more of the struts are closer to each other than they are in the open configuration;
• a substantially fluid-tight hood affixed to a plurality of the struts, the hood forming a concavity having a mouth with a first width when the struts are in the open configuration and a second smaller width when the struts are in the second configuration, and the hood having an exterior surface opposite the concavity;
• and
• a set of elongated legs each having respective proximal and distal ends, the distal ends of the elongated legs being flared radially outward and being further from the proximal ends of the struts than the distal ends of the struts are from the proximal ends of the struts.