• Eur. J. Clin. Pharmacol. · Oct 2006

    Comparative Study Clinical Trial

    Prospective sonographic evaluation of fentanyl side effects on the neonatal gallbladder.

    • Beate Schmidt, Bernhard Roth, Hartmut Stützer, and Gabriele Benz-Bohm.
    • Department of Neonatology, Children's Hospital, University of Cologne, Kerpenerstrasse 62, 50937, Cologne, Germany. beate.schmidt@uk-koeln.de
    • Eur. J. Clin. Pharmacol. 2006 Oct 1;62(10):823-7.

    ObjectiveIn an effort to minimise the stress and pain of mechanically ventilated neonates, the application of opioids has increased markedly. Abdominal adverse effects of opioid analgesics are constipation and increased pressure in the biliary system. Our aim was to evaluate the impact of continuous intravenous infusion of fentanyl on the volume of the neonatal gallbladder and to assess potential gastrointestinal side effects.MethodsWe prospectively matched pairs of 40 mechanically ventilated neonates (28-42 gestational weeks) under total parenteral nutrition and midazolam sedation. One group (20 patients) received continuous fentanyl infusions (dose 0.5-2 microg kg(-1) h(-1)) the other group (20 patients) served as controls. Sonographic measurements of gallbladder length, depth and width were performed to calculate gallbladder volume using the ellipsoid method. Repeated ultrasound images, date of meconium release and serum bilirubin levels were documented.ResultsFentanyl application was not associated with gallbladder sludge/stones, gallbladder hydrops, hyperbilirubinemia or prolonged meconium release. Neonatal gallbladder length, width and volume did not differ significantly (data expressed as mean, standard deviation, median, interquartile range: length (cm) 3.16+/-0.68, 3.3, 0.675 vs 3.06+/-0.62, 3.3, 1.1; P=0.645; width (cm) 1.02+/-0.23, 1.0, 0.28 vs 0.89+/-0.27, 0.9, 0.38, P=0.12; volume (cm(3)) 1.52+/-0.67, 1.7, 0.86 vs 1.22+/-0.77, 1.09, 1.19, P=0.20).ConclusionIn our study fentanyl caused no major complications in the biliary system and intestine of ventilated preterm and term neonates. Sonographic investigations of the gallbladder under fentanyl treatment may be dispensable. Further investigations are required to assess adverse gastrointestinal effects.

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