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Research into the effects of surgical ligation of the ductus arteriosus (DA) on regional tissue perfusion is limited. Near-infrared spectroscopy (NIRS) is a non-invasive technique for monitoring regional mixed arteriovenous saturations in capillary beds. Previous data suggest that DA closure may result in impaired cerebral perfusion1 because of alterations in pulmonary mechanics or cardiac function.2 These changes have been implicated in the aetiology of adverse neurodevelopmental outcome in neonates after DA ligation.3 In our neonatal unit, around 20 DA ligations are performed per year. Cerebral NIRS is routinely applied perioperatively using a non-adhesive positioning technique. …
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