The peripherical veinous catheterization is required for anesthesia. However, it's a painful procedure and causes stress or even phobia.

Hypnosis can be seen as an interesting tool. Conversational hypnosis needs no training. It is used by script, which makes it easier.

The working hypothesis for study is that the conversational hypnosia script reduces pain during the set up of peripherical veinous access.

The main objective is the analgesia assessment of conversational hypnosis script for peripherical veinous catheter set up versus standard script in operating room. A nurse anesthetist is reading the conversational script or standard script during the procedure. The nurse anesthetist is untrained for hypnosis.

The secondary objective are the level of anxiety, patient satisfaction within the perioperative period (EVAN G questionnaire), the heart rate and the evaluation how nurse anesthetist feels about using the script after each use.

Inclusion Criteria:

• Digestive endoscopy procedure under general anesthesia in one of the participating centers
• Patient speaking and understanding French
• Patient affiliated or entitled to a social security scheme
• Patient who received enlightened information about the study and who co-signed, with the investigator, a consent to participate after a minimum period of reflection

Exclusion Criteria:

• Patient with deafness
• Patient with cognitive impairment
• Pregnant and / or breastfeeding patient
• Patient with dissociative disorders (contraindication to hypnosis)
• Patient suffering from a pathology which can cause chronic pain
• Patient receiving analgesia or anxiety drug
• Patient under justice, curatorship or tutorship
• Patient deprived of liberty by judicial or administrative decision