US Patent 11883290 Retrievable tissue grasping devices, spacers, artificial valves and related methods

A clip for immobilizing leaflets of a cardiac or venous valve includes a hub having a pair of tangle resistant spring-biased outer arms coupled to an inferior end of the hub. A pair of tangle-resistant spring-biased inner arms lies adjacent to the outer arms and is coupled to a superior end of the hub. The clip may incorporate adjustable spacers and retrievable post implantation. A delivery catheter is used to position the valve clip adjacent a target valve while the outer and inner arms are biased in an opened position relative to each other. After the valve leaflets are located between the opened outer and inner arms, the biasing forces may be released to allow the clip to self-close over the valve leaflets.