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Effects of indomethacin on cerebral haemodynamics in very preterm infants
A D Edwards1, J S Wyatt, C Richardson
1Department of Paediatrics, University College and Middlesex School of Medicine, London, UK.
Insights
Indomethacin administration significantly reduces cerebral blood flow and oxygen delivery in preterm infants with patent ductus arteriosus. This effect impacts brain oxygen availability, necessitating careful monitoring before treatment.
Area of Science:
- Neonatalogy
- Pediatric Cardiology
- Medical Physics
Background:
- Patent ductus arteriosus (PDA) is common in preterm infants.
- Indomethacin is a standard treatment for PDA.
- Cerebral haemodynamics in preterm infants are vulnerable to interventions.
Purpose of the Study:
- To investigate the impact of intravenous indomethacin on cerebral haemodynamics and oxygen delivery in preterm infants with PDA.
- To compare the effects of rapid injection versus slow infusion of indomethacin.
Main Methods:
- Near-infrared spectroscopy (NIRS) was employed.
- 13 very preterm infants with PDA were studied.
- Indomethacin was administered intravenously at doses of 0.1-0.2 mg/kg.
Main Results:
- Indomethacin caused sharp decreases in cerebral blood flow, oxygen delivery, and blood volume in all infants.
- Cerebral blood volume reactivity to carbon dioxide changes was reduced.
- No significant differences were observed between rapid injection and slow infusion methods.
Conclusions:
- Indomethacin administration disrupts cerebrovascular control and reduces cerebral oxygen delivery in preterm infants with PDA.
- These effects may compromise brain cellular oxygen availability, especially in vulnerable regions.
- Optimizing oxygen delivery before indomethacin administration is crucial for preterm infants.
Abstract:
Near infrared spectroscopy was used to investigate the effects of intravenously administered indomethacin (0.1-0.2 mg/kg) on cerebral haemodynamics and oxygen delivery in 13 very preterm infants treated for patent ductus arteriosus. 7 infants received indomethacin by rapid injection (30 s) and 6 by slow infusion (20-30 min). In all the infants cerebral blood flow, oxygen delivery, blood volume, and the reactivity of blood volume to changes in arterial carbon dioxide tension fell sharply after indomethacin. There were no differences in the effects of rapid and slow infusion. These falls in cerebral oxygen delivery and the disruption of cerebrovascular control might compromise cellular oxygen availability, particularly in regions of the brain where the arterial supply is precarious. Care should be taken to ensure that oxygen delivery is optimum before the administration of indomethacin to preterm infants.