spinal tap

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Noun1.spinal tap - removal by centesis of fluid from the subarachnoid space of the lumbar region of the spinal cord for diagnostic or therapeutic purposes
centesis - (surgery) the act of puncturing a body cavity or organ with a hollow needle in order to draw out fluid
References in periodicals archive ?
Several had MRI scans, spinal taps, and computerized analysis of their optic nerve.
While other researchers have used spinal taps to provide a snapshot of amyloid-beta concentrations (SN: 2/18/06, p.
You went through two spinal taps and a dozen surgeries.
Houston Firm Continues Validation of Blood Serum-based Testing; 'Fast, Simple, Accurate Tests - Not Spinal Taps,' Says CEO Steven Rash