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. 2017 Jul;38(7):1276–1283. doi: 10.3174/ajnr.A5128

Fig 9.

Fig 9.

Bubble technique to avoid sucking nerve roots into the spinal needle. The short tubing is literally lying on the LP needle hub so that there is no manipulation of the needle. Both air and CSF fill the tubing and the syringe. With this technique, we have never had nerve root pain reported, and CSF can be easily aspirated.