Mortify definition, to humiliate or shame, as by injury to one's pride or self-respect. See more.
Lumbar puncture. Lumbar puncture (LP), also known as a spinal tap, is a medical procedure in which a needle is inserted into the spinal canal, most commonly to collect cerebrospinal fluid (CSF) for diagnostic testing. The main reason for a lumbar puncture is to help diagnose diseases of the central nervous system, including the brain and spine.
Why It Is Done. 1  Find the cause of fluid buildup in the belly. 2  Diagnose an infection in the peritoneal fluid. 3  Check for certain types of cancer, such as liver cancer. 4  Remove a large amount of fluid that is causing pain or difficulty breathing or that is affecting how the kidneys or the intestines (bowel) are working.