An implantable device introduced into the gastro-oesophageal sphincter to reduce a sliding hiatal hernia, preventing the reflux of gastric contents into the oesophagus. It typically consists of a toroidal, C-shaped elastomer ring filled with a silicone gel that includes a polyester tie to secure the ring around the gastro-oesophageal junction; it is intended for surgical implantation under the diaphragm to hold the lower oesophagus in place as an alternative to traditional surgical fixation of the stomach (i.e., gastropexy) or fundoplication. This GMDN code may reflect old technology.
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