A retrospective study of 178 patients undergoing axillary brachial plexus block (ABPB) for hand surgery used information gathered by a computer-aided anaesthetic record keeping system. The practical use of local techniques to augment the block meant that only two of the 178 patients required a general anaesthetic, giving a success rate of 98.8%. There were no significant complications.
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Dunlop et al. (1995) studied this question.