Prevention of post-dural puncture headache: a randomized controlled trial.

These data suggest that a 25G atraumatic needle is superior to a larger atraumatic needle, and to a same-sized cutting needle, in preventing PDPH after diagnostic LP. In contrast to one earlier report, this study did not find that stylet reinsertion was effective in preventing PDPH. This study provides class I evidence that a small atraumatic needle decreases the risk of PDPH and that stylet reinsertion does not influence PDPH risk.