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.
Depending on the reason for your lumbar puncture: 1  a small amount of fluid may be withdrawn through the needle to be tested in a laboratory. 2  cerebrospinal fluid may be removed to relieve pressure in the spinal canal. 3  chemotherapy or other medication may be injected into the spinal canal as prescribed by your physician.