British Journal of Anaesthesia, Vol 76, Issue 1 77-80, Copyright © 1996 by The Board of Management and Trustees of the British Journal of Anaesthesia
U. R. Dopfmer, D. G. Maloney, P. A. Gaynor, RMH. Ratcliffe and S. Dopfmer
We have compared motor block of the extraocular muscles produced by
injections of 3% prilocaine and a mixture of equal parts of 2% lignocaine
and 0.75% bupivacaine into the medial compartment of the orbit. A volume of
8 ml was used initially, and a vasoconstrictor and hyaluronidase were added
to both solutions. Ninety patients undergoing cataract surgery were
allocated randomly to one of two groups in double- blind study. Eight
minutes after block insertion, the median ocular movement score in the
prilocaine group was 1 and in the lignocaine- bupivacaine group 3. This
difference was statistically significant (P = 0.016). Twenty of the
patients who received prilocaine and 29 of the patients who received the
lignocaine-bupivacaine mixture required an additional inferotemporal
injection. This difference was not statistically significant (P = 0.094).
CLINICAL INVESTIGATIONS
Prilocaine 3% is superior to a mixture of bupivacaine and lignocaine for peribulbar anaesthesia
Department of Anaesthesia, East Surrey Hospital, Three Arch Road, Redhill, Surrey RH1 5RH; Institut fur Medizinische Statistik, Universitatsklinikum Benjamin Franklin, Hindenburgdamm 30, 12200 Berlin, Germany
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