This randomized clinical trial will evaluate the effect of hypnosedation on the need of sedation and analgesia in a pediatric population undergoing dermatological surgery, both during the procedure, and 24 hours after surgery. In addition, a secondary objetive is to evaluate the effect by specific age groups.

In this clinical trial, pediatric patients scheduled for removal of benign skin lesions in a single center willbe randomised to receive hypnosis (intervention group) or attention-distracting techniques (control group). Endpoints will be the sedative dose (propofol) during surgery, and the need for analgesia (paracetamol and others) immediately after surgery (recovery) and after 24 hours. Randomization will be systematic in blocks depending on the day the surgery is programmed. Hypnosis will be delivered by an experienced anesthesist trained in the technique. Patients and families will be informed of the special treatment during surgery, but will be unaware of whether the patients are experiencing distraction or hypnosis techniques. Distraction is already a useful technique, and it is expected that patients will be satisfied with the procedure; however, the hypothesis to be tested is that hypnosis reduces the need for sedation and analgesia compared to distraction techniques, as well as improves satisfaction.

Inclusion Criteria:

1. A class I or II of anaesthetic risk according to the American Society of Anesthesiologists,
2. to be in a percentile between P3 and P97 in weight and height,
3. without known drug allergies, and
4. having fasted 6 hours for solids and 2 hours for water.

Exclusion Criteria:

1. Children with diagnosed mental retardation or attention deficit,
2. behavioural disorders,
3. previous treatment with hypnosis,
4. history of neurological pathology or psychomotor retardation,
5. previous pain-related pathology,
6. obstructive sleep apnoea syndrome (OSAS)

Any document upon reasonable request to the PI.

Up to 1 year after publication

Justified interest in data. By e-mail to PI

Different investigators are assigned to each phase of the study, with one designated as responsible for recruitment (MQD), another for intervention and control (JMPP), and another for subsequent evaluation in the post-anaesthesia recovery unit (URPA) and at 24 hours (responsible nursing staff).