Same Day Ambulatory Appendectomy (SAMBA)

Inclusion Criteria: * Patients aged 15-74 years * BMI ≤ 35 kg/m2 * Uncomplicated acute appendicitis confirmed by imaging (ultrasound and/or CT and/or MRI) * Temperature ≤ 38,1°C and \> 35,5°C * Appendix diameter \> 6mm and ≤ 15mm * Without effusion or with only localized peri-appendicular effusion * Infiltration of peri-appendicular fat without abscess or plastron * No sign of perforation * Leukocytes ≤ 18,000G/L AND * CRP (C reactive protein) ≤ 60mg/L * If pain, calmed by level 3 analgesic at maximum * Ambulatory criteria * Availability of monitoring by a relative during the 12 hours after discharge from the hospital * Residence located less than 20 minutes by car from a health center (hospital or clinic) * Access to a telephone mobile or fixed in case of problems * Signature of the written informed consent form by the patient * If the patient is a minor, signature of the written informed consent form by both parents or their legal representative * Affiliation to a French health insurance scheme or equivalent Exclusion Criteria: * Criteria that exclude ambulatory care such as an ASA score (Physical status score) \> 2, severe or uncontrolled comorbidities, severe pulmonary disease including obstructive sleep apnea, anticoagulation or antiplatelet drug or contraindication to ambulatory surgery such as intubation difficulties * Presence of active cancer, a malignant hemopathy, drug addiction, coagulopathy, immunosuppressive treatment * Non-acute or inte…