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Neonatal lidocaine intoxication

H Pagès, B de la Gastine, J Quedru-Aboane, M-G Guillemin, V Lelong-Boulouard, B Guillois
Pudendal nerve block may be indicated during instrumental delivery in situations where peridural anesthesia is unavailable. We report three cases of neonatal lidocaine intoxication following maternal pudendal block during delivery. Clinical features were hypotonia, pupillary mydriasis fixed to light, apnea, cyanosis and seizures. Two neonates required mechanical ventilation. Lidocaine was found in the serum of two babies. In all three cases, recovery was complete. The pharmacokinetics of lidocaine in a highly vascularized perineum during labor increase the risk of neonatal intoxication...
June 2008: Journal de Gynécologie, Obstétrique et Biologie de la Reproduction
S Datta, G L Houle, G S Fox
Lidocaine concentrations were measured after vaginal delivery or Caesarean section with epidural anaesthesia in samples of maternal and umbilical blood and in newborn gastric contents. The pH of the gastric aspirate was also determined in a number of neonates. Gastric lidocaine concentrations were higher and the pH was lower after vaginal delivery in comparison to Caesarean section. A significant inverse correlation exists between gastric pH and gastric lidocaine concentration, Neonate gastric lidocaine concentration was significantly higher than in maternal or umbilical venous plasma after vaginal delivery, but not after Caesarean section...
January 1975: Canadian Anaesthetists' Society Journal
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