Abstract
Cephradine levels were assayed in serum, gall bladder wall and bile sampled from the gall bladder and common bile duct in 24 patients undergoing elective cholecystectomy. Cephradine was administered either as 1 g given intravenously at the time of anaesthetic induction, or as three 6-hourly doses of 0.5 g taken orally during the pre-operation day followed by 1 g intramuscularly with the premedication. Adequate antibacterial levels of cephradine were achieved in all serum samples, 8 of 9 samples of choledochal bile, 6 of 12 samples of cholecystic bile and all 12 samples of gall bladder wall in the group receiving a single intravenous dose, compared to only 4 of 12 serum samples, 6 of 11 choledochal bile samples, 6 of 10 cholecystic bile samples, and only 3 of 12 samples of gall bladder wall in the group receiving oral cephradine. Therefore, cephradine given as a 1 g bolus intravenously with anaesthetic induction provides satisfactory concentrations for antibacterial prophylaxis during gall bladder surgery but a regimen of oral and intramuscular dosage was found to be unsatisfactory.
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