Tissue anchors having bi-directional arrays of barbed pins for joining tissue layers

摘要

A tissue anchor includes a plate having a top surface and a bottom surface, and an array of first pins coupled with the plate, whereby each first pin includes an elongated shaft having a lower end with a first barb facing away from the bottom surface of the plate. The plate has an array of second pin apertures that are offset from the first pins, whereby each second pin aperture has a diameter that extends from the top surface to the bottom surface of the plate. The tissue anchor includes an array of second pins extending through the second pin apertures, whereby each second pin has an elongated shaft having an upper end including a second barb facing away from the top surface of the plate and a lower end including a stop that is located below the bottom surface of the plate. The elongated shafts of the second pins have outer diameters that are smaller than the diameters of the second pin apertures for allowing the elongated shafts of the second pins to slide within the second pin apertures. The second barbs and the stops of the second pins have outer diameters that are larger than the diameters of the second pin apertures.