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.
Why a lumbar puncture may be done. A lumbar puncture may be done: to take a sample of CSF to help the doctors make a diagnosis -for example, to look for infection or cancer cells in the CSF. to measure the pressure of the CSF. to inject a drug into the CSF.