Contribution of Hypnosis During a Lumbar Puncture.

The lumbar puncture technique will be identical to that of the group standard of care. Hypnosis will be performed by a health professional trained in this practice, in addition to the standard analgesic management.

"The LP will be carried out according to the usual techniques without hypnosis.~Standard analgesic treatments will be used (except contraindications):~* EMLA (Lidocain+Prilocain) Cream/Patch~* Local anesthesia with lidocain chlorhydrate monohydrate 1% injectable~* Nitrous oxide"