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.
Lumbar puncture (spinal tap) may reveal lower than normal spinal fluid pressure, and might potentially increase the severity of the symptoms temporarily. Sometimes we are 100 percent sure that there is a leak lurking somewhere, but may be unable to find it with any test.