Patent ID: 8308813

Claim:
An anti-obesity device comprising: an elongated element extending from a proximal end to a distal end and having a width selected to closely match an inner diameter of a portion of a duodenum into which it is to be implanted, the elongated element configured to separate the duodenum into first and second elongated channels after insertion therein, the first channel being positioned so that all chyme flowing through the duodenum enters the first channel and the second channel being positioned so that, when the elongated element is in a desired position with the duodenum, an opening thereto is open to a papilla of vater so that digestive fluids from the papilla of vater enter the second channel, the elongated element being constructed to have a rate of permeability with respect to fluids flowing therepast no greater than a predetermined maximum permeability; a retainer configured to retain the elongated element at the desired position within the duodenum, a funnel extending from a proximal end having an diameter greater than a diameter of a pylorus to a distal end having an outer diameter smaller than the diameter of the pylorus, wherein the proximal end is configured for insertion at the proximal end of the elongated element to guide the chyme into the first channel; and a funnel retainer configured and dimensioned for insertion proximally of the pylorus and connected to the proximal end of the funnel to retain the funnel in a desired position.