A system for treating obesity in a patient including a gastric implant to
control alimentary absorption, the gastric implant including a ring sized
and shaped to fit around an esophagus of the patient and a motorized
controller to adjust extension of the ring, and an induction coil to
power the motorized controller, wherein the induction coil is integrated
in the implant; and a control equipment unit including a device to adjust
emission power of the induction coil; wherein the implant further
includes an electronic circuit delivering a response signal to a command
transmitted by the control equipment unit.
