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.
How it is performed. Lumbar punctures are carried out in hospital. This may be after an emergency admission, or the procedure may be arranged in advance. Before a lumbar puncture, checks will be made to confirm the procedure is safe for you. Usually a computerised tomography (CT) scan or an magnetic resonance imaging (MRI) scan will have been carried out to make sure the lumbar puncture is needed and will not cause any harm.