@article{hopkinson_comparative_1997,
	title = {A comparative multicentre trial of spinal needles for caesarean section},
	volume = {52},
	issn = {0003-2409},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/9370847},
	abstract = {We studied 681 patients in a randomised, multicentre, double-blind, parallel group trial designed to assess the incidence of headache following spinal anaesthesia for Caesarean section using four different pencil point spinal needles. The needles used were: Whitacre 25G (n = 170), Polymedic 25G (n = 170), Sprotte 24G (n = 173) and Polymedic 24G (n = 168). The incidence of all headaches prior to discharge was 11.1\%. Only five headaches (0.75\%) were severe with features of post dural puncture headache (PDPH) and required an epidural blood patch: Whitacre 25G = 0, Polymedic 25G = 1 (0.6\%), Sprotte 24G = 2 (1.2\%), Polymedic 24G = 2 (1.2\%). There was no statistically significant difference between the four groups for PDPH. We conclude that all four needles studied performed satisfactorily and comparably.},
	number = {10},
	urldate = {2012-02-13TZ},
	journal = {Anaesthesia},
	author = {Hopkinson, J M and Samaan, A K and Russell, I F and Birks, R J and Patrick, M R},
	month = oct,
	year = {1997},
	pmid = {9370847},
	keywords = {Adult, Anesthesia, Obstetrical, Anesthesia, Spinal, Cesarean Section, Double-Blind Method, Dura Mater, Female, Headache, Humans, Marketingaktiv, Needles, Pregnancy},
	pages = {1005--1011}
}

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