Resistive anti-obesity devices

摘要

A patient is provided with an increased sense of satiety by increasing resistance to the outflow of food from the stomach and through the intestines. Stomach emptying may be slowed with devices implantable within the gastrointestinal tract below the stomach. Implants are preferably removable and can include artificial strictures that may be adjustable to vary the rate of stomach emptying. Slowing gastric emptying may induce satiety for a longer period and may therefore reduce food consumption. Many of the embodiments include intestinal liners or sleeves, but they need not. The resistor concept may be applied to a simple anchor and resistor without a long liner.

主权项

1. A gastrointestinal implant comprising:
an anchor configured for implantation within a gastrointestinal tract of an animal at a position distal to the animal's pylorus; a collapsible, elongated liner coupled to the anchor, the liner formed from a substantially non-permeable material, the anchor and liner defining a lumen through which chyme passes, the liner being thin and unsupported beyond the anchor and tending to collapse upon itself when empty; and an orifice in communication with the anchor, the orifice retained at between 3 mm and 5 mm in diameter, the orifice being a hole in a membrane positioned within and across the lumen, the anchor removably securing the liner and membrane in position and the membrane retarding the outflow of chyme from the stomach.