Um, Letâs Rethink That Salute (1930s) Again, in his book To the Flag: The Unlikely History of the Pledge of Allegiance, Richard J. Ellis explains that by the mid-1930s, Americans had begun to notice eerie similarities between the Bellamy salute and the âHeil Hitlerâ salute.
A lumbar puncture may be used to collect a sample of cerebrospinal fluid in order to detect the presence of certain types of cancer or infection. Lumbar punctures may also be used to inject medications, such as spinal anesthesia or chemotherapy drugs.
A lumbar puncture is performed to see if the pressure of the CSF is elevated or not. In addition, a lumbar puncture may be used to measure the pressure of the CSF, which flows freely between the spinal column and the brain.The doctor measures the pressure during a lumbar puncture using a special tube (called a manometer) that is attached to the lumbar puncture needle.here is a risk of bleeding in the spinal canal. Should there be increased pressure or swelling in the brain before the procedure, a lumbar puncture can cause fluctuations in the CSF fluid levels, resulting in brain herniation.