Background and methods. There is a growing awareness of the possibility of headache resulting from intracranial air secondary to identification of the epidural space by loss of resistance using air (LOR-A). Most reported cases have been attributed to subarachnoid air passage. A case is described of sudden headache following LOR-A.
Results. Various features of the case suggest that the passage of air to the head was subdural rather than subarachnoid.
Conclusions. Recovery was uneventful.
- epidural anesthesia
- subdural space.
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The authors thank Victor Haughton, M.D., Roy Strand, M.D., Juan Taveras, M.D., and Alan Williams, M.D. for evaluation of the x-ray images.