| abstract |
Disclosed is a delivery device for controllably delivering a prosthetic bulking device (16) below a tissue surface such as below the mucosa (15) to treat gastroesophageal reflux disease. The delivery device may be embodied in a deployment catheter (73), an endoscope (30), or an endoscope attachment (70). The bulking device (16) may additionally be explanted from beneath the mucosa (15). In one embodiment, the bulking device (16) comprises a hydrogel (24). |