Definition of Puncture, lumbarPuncture, lumbar: A procedure in which cerebrospinal fluid is removed from the spinal canal for diagnostic testing or treatment. Abbreviated LP. The patient usually lies sideways for the procedure, although LPs in infants are often done upright. After local anesthesia is i Last Editorial Review: 3/30/2012
Back to MedTerms online medical dictionary A-Z List Need help identifying pills and medications? |
Get the latest health and medical information delivered direct to your inbox FREE!


