osmed self-inflating tissue expanders are made of a specially developed hydrogel (methylmethacrylate-n-vinylpyrrolidone-co-polymer) using the osmotic principle to expand physiological tissue space due to the absorption of body fluid from the surrounding tissues. The osmed Hemisphere Expanders are used for expansion of the connecting tissue sack at congenital anophthalmia and microphthalmia.
An expandable device intended for implantation to temporarily enlarge tissue, typically the dimensions of a skin flap where there is insufficient tissue coverage to accommodate the volume of an implantable device (e.g., a breast implant), or for the revision of a scar or cutaneous defect. The device typically consists of an expansion envelope (e.g., silicone elastomer) with fill tube and an inflation valve, and is expanded percutaneously with air or fluid through a subcutaneous port accessed by a healthcare professional. This is a single-use device.