Lumbar puncture is an invasive procedure potentially inducing pain and anxiety indicated in elderly patients for cognitive assessment. Indeed, the measure of amyloid biomarkers and tau in the cerebrospinal fluid is useful in the etiological diagnosis of cognitive disorders. With the ageing of the population and the increase incidence of cognitive disorders, this diagnostic procedure will be more and more frequent. Many studies have shown the efficiency of hypnosis during invasive procedure, especially in young children. The absence of side-effect is a major asset in elderly patients at high iatrogenic risk. It represents an interesting alternative to anxiolytic or sedative treatments. Nevertheless, its effectiveness in the elderly during lumbar puncture remains to be demonstrated. Investigators hypothesized that hypnosis may decrease pain and anxiety during lumbar puncture associated to setting comfort situation (relational care, music, transcutaneous anesthesia).
