British Journal of Anaesthesia, 1992, Vol. 69, No. 6 577-579
© 1992 The Board of Management and Trustees of the British Journal of Anaesthesia
research-article |
PHARMACOKINETICS OF LIGNOCAINE IN CHILDREN AFTER INFILTRATION FOR CLEFT PALATE SURGERY
1Department of Anaesthesia, University of Sheffield, Medical School Beech Hill Road, Sheffield S10 2RX
2Children's Hospital, Western Bank Sheffield S10 2TH
We have studied the pharmacokinetics of lignocaine in children after local infiltration for cleft palate surgery. After induction of anaesthesia, lignocaine 2.5 mg kg1 with adrenaline 1.200000 was injected into the palate. Blood samples were collected before and at 2, 5, 10, 15, 20, 30, 60 and 120 min after infiltration. Plasma concentrations of lignocaine were measured by a gas-liquid chromatographic technique. There were no signs of systemic toxicity on routine monitoring of the patients and the peak plasma concentrations were less than the accepted toxic values. Mean half-life was 72.9 (SEM9.9) min, similar to that found previously in adults and children. However differences in mean clearance (24.6 (2.04) ml kg1 min1) and volume of distribution (0.80 (0.07) litre kg1) were found between this and previous studies.