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Volume 356:424-425 January 25, 2007 Number 4
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Lumbar Puncture

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by Ellenby, M. S.
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To the Editor: According to the instructional Video in Clinical Medicine on lumbar puncture by Ellenby and colleagues (Sept. 28 issue),1 as the spinal needle is incrementally advanced, the stylet should be withdrawn periodically to check for cerebrospinal fluid (CSF) and then reinserted until the needle enters the subarachnoid space. This is how most pediatric emergency physicians advance spinal needles,2 but it may not be the best method. The main purpose of the stylet is to prevent the formation of an epidermal tumor by avoiding the introduction of a skin plug into the subarachnoid space. Thus, the stylet is of . . . [Full Text of this Article]



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