Various barrier films are described that include barrier layers that contain ethylene vinyl alcohol copolymers and elastomers. These polymeric regions, in turn, contain one or more polymers, at least one of which is a copolymer that includes a styrene monomer and an isobutylene monomer. The adjustable annuloplasty ring includes a tubular body member, one or more adjustable members, and an internal magnet within the tubular body member. After the data message is sent, a determination is then made as to whether the wireless device is active in the communications network.