Patent ID: 8870907

Claim:
A medical device for use with a filler material for occupying a space within a patient's body, the medical device comprising: a device assembly comprising an enclosed reservoir, a fluid transfer member, and a release section comprising an elongated structure extending into the reservoir, where a lumen of the elongated structure provides a fluid path out of the enclosed reservoir; where the enclosed reservoir is fluid impermeable; the fluid transfer member is configured to permit delivery of the filler material into the enclosed reservoir to expand the device assembly towards an active profile; where the release material is located within the reservoir and compresses an exterior of the elongated structure to prevent fluid flow through the fluid path; and where the elongated structure separates the release material from the fluid path such that the release material remains entirely exterior to the fluid path and is physically separated from an environment within the patient's body until reduction of the structural integrity of the release material opens the elongated structure to open the fluid path.