This question has been studied recently. Sylaidis P. Logan A. Digital blocks
with adrenaline. An old dogma refuted. Journal of Hand Surgery - British
Volume. 23(1):17-9, 1998 Feb. Looked at 100 digital blocks with adrenaline.
Loss of perfusion was only temporary. These authors reviewed the literature
and found no evidence. (If anyone does have a case of long term sequelae,
it's worth writing up as a case report in its own right)
Matt Dunn
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