Interventional pain therapeutic procedures must be done with the informed consent of the patient. The choice of a specific pain therapeutic treatment depends primarily on the site and type of surgery performed. There may be indications or contraindications pertaining to the patient's co-morbidity and prior medications, as well as to the surgery itself. The patient's preferences should always be taken into account. Information about the procedure and risks of a planned pain therapeutic treatment should be discussed with the patient during the preoperative anesthetic assessment and should be documented on the anesthetic record.