Cerebrospinal fluid (CSF) manometry

Midsagittal section through lumbar spinal column showing positioning for measurement of CSF opening pressure. The manometer is attached to the spinal needle hub with a three-way stop-cock. CSF is permitted to enter the manometer; opening pressure is recorded at the highest level attained by the CSF in the manometer column. Pressure measurements should be taken with the patient recumbent.