Abstract: Radiopaque polymer compositions and methods for making the compositions are provided. These radiopaque polymer compositions include polymer compositions comprising a crosslinked polymer network, the network comprising a first repeating unit derived from a monofunctional monomer, a second repeating unit derived from a crosslinker monomer having more than two polymerizable groups and a third repeating unit a derived from a crosslinker monomer having two or more polymerizable groups. Devices formed from radiopaque polymer compositions and methods for synthesizing radiopaque polymer compositions are also provided.

Abstract: Occlusive implants are provided with various embodiments of active and/or passive release structures. Systems for delivering the occlusive implants as well as methods for making and delivering the implants are also provided.