Once the consultation for abdominal pain by an emergency pediatrician carried out, the diagnostic orientation is confirmed by a visceral pediatric surgeon who performs a biological check-up and an abdominal ultrasound. After confirmation of eligibility for ambulatory care according to national recommendations and informed consent, the child is - according to the time of care and the clinical condition of the patient - immediately hospitalized in the unit (UCA) be allowed to return to his home with reconviction in the ambulatory surgery unit the next morning, at the opening of the service, on an empty stomach.