Abstract: An apparatus includes a plurality of links and a plurality of beads. The plurality of beads is joined using the plurality of links and is configured to be arranged in an annular arrangement. The annular arrangement is sized and configured to form a loop around an anatomical structure in a patient. Each bead includes a housing, a passageway extending through the housing, and at least one annular magnet disposed around the passageway of the bead. The at least one annular magnet includes an aperture defining a magnet axis. The at least one annular magnet of each of the beads is configured to magnetically bias the loop toward the contracted configuration. For at least one of the plurality of beads, the at least one annular magnet includes a feature configured to concentrate or diffuse a magnetic field interaction of adjacent beads of the plurality of beads toward the magnet axis.

Abstract: An implantable restriction device includes a plurality of beads and a plurality of links that join the beads together. The beads include a housing including a contact surface, a passageway extending through the hosing along an axis, and at least one magnet disposed around the passageway. Portions of the links are slidably disposed in corresponding passageways of the beads such that the beads are operable to transition between a constricted configuration and an expanded configuration. The contact surfaces of adjacent beads abut against each other in the constricted configuration. Adjacent magnets within adjacent beads generate an interactive magnetic field foxed on the abutting contact surfaces of adjacent beads.

Abstract: An implantable restriction device includes a plurality of beads and a plurality of links that join the beads together. The beads include a housing including a contact surface, a passageway extending through the hosing along an axis, and at least one magnet disposed around the passageway. Portions of the links are slidably disposed in corresponding passageways of the beads such that the beads are operable to transition between a constricted configuration and an expanded configuration. The contact surfaces of adjacent beads abut against each other in the constricted configuration. Adjacent magnets within adjacent beads generate an interactive magnetic field foxed on the abutting contact surfaces of adjacent beads.

Abstract: An implantable restriction device includes a plurality of beads and a plurality of links that join the beads together. The beads include a housing including a contact surface, a passageway extending through the hosing along an axis, and at least one magnet disposed around the passageway. Portions of the links are slidably disposed in corresponding passageways of the beads such that the beads are operable to transition between a constricted configuration and an expanded configuration. The contact surfaces of adjacent beads abut against each other in the constricted configuration. Adjacent magnets within adjacent beads generate an interactive magnetic field foxed on the abutting contact surfaces of adjacent beads.