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.
Injections into the CSF for Treatment of Brain or Spinal Cord Cancer. A lumbar puncture may be used to deliver chemotherapy medication to treat brain or spinal cord cancer. This process is known as intrathecal chemotherapy. It is used in treatment of some types of leukemia or lymphoma.