Subarachnoid injection during extradural analgesia for labour using 2-chloroprocaine

An obstetric patient had a subarachnoid block during attempted extradural analgesia for labour. The sensory block extended to T1 and was accompanied by hypotension. The analgesia lasted 3 hr. after which sensory and motor function recovered quickly. The local anaesthetic agent used was 2% 2-chloroprocaine.