Smith G B, Barton F L, Watt J H
Anaesthesia. 1984 Apr;39(4):355-8. doi: 10.1111/j.1365-2044.1984.tb07277.x.
A case is described where a small dose of bupivacaine was accidentally injected into the subdural, extra-arachnoid space resulting in extensive unilateral block and hypotension. The spread of solution was confirmed radiologically.