Investigations

Lumbar puncture ^a  

Replace the stylet before withdrawing the needle. ^a  

Why?

Replacing the stylet reduces post-lumbar puncture headache

Patient	Treatment	Comparison	Outcome	CER	RRR (95% CI)	NNT (95% CI)
adult undergoing lumbar puncture a	Replacing stylet	No replacement	post-lumbar puncture headache at 7 days	16%	69% (47% to 82%)	9 (6 to 15)