A method for surgically placing an artificial stomach in a patient. The method comprises the steps of cutting an opening in the abdominal wall of the patient, dissecting an abdominal area and placing the artificial stomach in the dissected abdominal area. The artificial stomach comprises a food reservoir adapted to collect food, an inlet connected to a first opening of the food reservoir and further being adapted to directly or indirectly upstream connect to the patient's gastrointestinal tract, and an outlet connected to a second opening of the food reservoir and further being adapted to downstream connect to the patient's gastrointestinal tract. The artificial stomach further comprises an inlet valve placed between the patient's gastrointestinal tract and the first opening of the food reservoir. The method further comprises the steps of connecting the inlet comprising the inlet valve of the food reservoir upstream to the patient's gastrointestinal tract, connecting the outlet of the food reservoir downstream to the patient's gastrointestinal tract, and implanting a source of energy in the patient, adapted to be charged non-invasively with wireless energy, and adapted to be controlled to release energy for use in connection with the operation of the artificial stomach.
