Analysis of cerebrospinal fluid ... for interpretation. If the flow of CSF is insufficient for free collection, it may be necessary to aspirate the fluid carefully with a syringe.

Attier-Zmudka J, Sérot JM, Valluy J, et al. Decreased cerebrospinal fluid flow is associated with cognitive deficit in elderly patients. Front Aging Neurosci. 2019;11:87. doi:10.3389/fnagi.

The actor was immediately taken into surgery, where doctors not only removed the knife but also addressed a severe complication—a cerebrospinal fluid (CSF ... in CSF flow, such as a leak ...