A Randomized Study Evaluating the Incidence of Post Lumbar Puncture Headache With Atraumatic Needles in Hematology

"Patients will perform a spinal punction with a standard needle, used in the usual practice. The standard needles have the following characteristics : BD 22 G x 3 ½ in, 90mm, Quincke spinal needle, Black hub.~When more than 2 attempts for lumbar puncture fail, the investigator will proceed with standard techniques (BD 20G x 3 ½ in, Quincke spinal needle, 90mm, yellow hub). This is a failed lumbar puncture."

"Patients will perform a spinal punction with an atraumatic needle, used in the hematological service of the CHU of Saint-Etienne. The atraumatic needles have the following characteristics : Vygon 24 G × 3 ½ in, 90mm, Whitacre Pencil Point Spinal Needle, Purple hub.~When more than 2 attempts for lumbar puncture fail, the investigator will proceed with standard techniques (BD 20G x 3 ½ in, Quincke spinal needle, 90mm, yellow hub). This is a failed lumbar puncture."