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Dual dimpling in the dog
Author(s) -
AITKENHEAD A.R.,
HOTHERSALL A.P.,
GILMOUR D.G.,
LEDINGHAM I.McA.
Publication year - 1979
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.1979.tb04861.x
Subject(s) - medicine , indentation , anatomy , dura mater , radiography , surgery , composite material , materials science
Indentation of the dura has been proposed as the cause of subatmospheric pressure in the extradural space, but has never been demonstrated directly in humans. In this study, radiographs have been produced showing dimpling of the dura by a needle tip lying in the extradural space in the dog. Pressure tracings demonstrate that advancement of the needle tip produces a progressive decrease in extradural pressure, and observations made using an image intensifier have confirmed that the pressure changes are proportional to the degree of dural indentation.