Lumbar punctures (LP) are frequent invasive procedures that are anxiety-provoking for both the patient and the clinicans performing the procedure. LP is performed by many practitioners, whether they are emergency physicians, neurologists, neurosurgeons, internists or rheumatologists. Learning how to perform LP is essentially done at the patient's bed by showing the students how a procedure is performed and then having them perform it directly on a patient afterwards. The recent development of simulation in health care with the credo "never the first time on the patient" requires the development of training devices faithful to reality.

The rheumatology department of the Strasbourg University Hospital has been working for 3 years, in collaboration with the Strasbourg start-up InSimo, on the development of an LP simulator. This simulator is original because it allows the feeling by pressure of the passage of the various structures, and in particular the yellow ligament. This sensation is made possible by a haptic force feedback device.

Inclusion criteria:

• Requiring a lumbar puncture as part of their routine care
• Male or female of legal age with no upper age limit
• French speaking
• Subject affiliated to a social health insurance scheme
• Not having expressed his or her opposition to the re-use of his or her data in the context of this research

Exclusion criteria:

• Previously undergone a lumbar puncture
• BMI > 35 kg/m².
• Spinal ankylosis: history of ankylosing spondylitis or Forestier's disease
• Impossible to give the subject informed information (subject in an emergency situation, difficulties in understanding the subject, etc.)
• Subject under court protection
• Subject under guardianship or curatorship
• Contraindication to the use of Emlapatch