• Br J Anaesth · Feb 1996

    Case Reports

    Sudden onset of subarachnoid block after subdural catheterization: a case of arachnoid rupture?

    • D W Elliott, F Voyvodic, and P Brownridge.
    • Department of Anaesthesia and Intensive Care, Flinders Medical Centre, South Australia.
    • Br J Anaesth. 1996 Feb 1; 76 (2): 322-4.

    AbstractWe describe a patient who received an apparently uneventful extradural block in labour but developed rapid extension of neural block within minutes of receiving her first incremental dose 2 h later. Computed contrast tomography revealed radio-opaque dye within both the subdural and subarachnoid spaces, but none within the extradural space. This case report demonstrates that subdural spread of low-dose local anaesthetics is not always clinically distinguishable from extradural analgesia and that the arachnoid membrane may subsequently perforate with potentially serious consequences.

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