Patent ID: 8496702

Claim:
A system useful in breast surgical procedures for promoting tissue growth in a breast, the system comprising: an implantable tissue expansion device comprising an inner membrane, an outer membrane, wherein the inner membrane and the outer membrane define a thin-walled pressure vessel which forms an inner surface and an outer exterior surface of the device respectively, and an inflatable cylindrical vessel in the form of a spiral, encased within the outer membrane and the inner membrane and the vessel being expandable upon inflation thereof between a substantially planar deflated state and an inflated state in the form of a dome having a vertex with the outer membrane positioned external to the dome and the inner membrane positioned internal to the dome, with a concave region formed below the vertex and external to the inner membrane, said tissue expansion device being structured to form a void within breast tissue and external to the device when the device is implanted in the breast and inflated; and an agent suitable for injection into the void formed by the device when the device is so implanted in the breast and inflated, wherein said agent promotes tissue growth.