British Journal of Anaesthesia, 1995, Vol. 74, No. 6 704-705
© 1995 The Board of Management and Trustees of the British Journal of Anaesthesia
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Maximum recommended doses of lignocaine are not toxic
Department of Anaesthesiology, Turku University Hospital SF-20520 Turku, Finland
Department of Pharmacology, Turku University Hospital SF-20520 Turku, Finland
The maximum recommended doses of lignocaine are frequently exceeded in clinical practice as some blocks may need more lignocaine to produce adequate anaesthesia. We have examined the success rate of brachial plexus block, possible toxic symptoms after a dose of lignocaine 900 mg with adrenaline, and the maximum plasma concentration of lignocaine produced in 17 adult patients. In all patients, the block was excellent and no toxic symptoms were encountered. The highest mean lignocaine plasma concentration was 2.9 µg ml1 45 min after the block. We conclude that in brachial plexus block, the dose of lignocaine with adrenaline can be as high as 900 mg without fear of toxic symptoms
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