lumbar puncture(redirected from rachiocentesis)
Also found in: Dictionary, Thesaurus, Medical.
lumbar puncture:see spinal puncturespinal puncture,
surgical penetration of the spinal canal by a hollow needle introduced between two of the lumbar vertebrae. The arrangement permits injection of antibiotics or anesthetics (see anesthesia) as well as dyes to facilitate X-ray studies.
..... Click the link for more information. .
Med insertion of a hollow needle into the lower region of the spinal cord to withdraw cerebrospinal fluid, introduce drugs, etc.