ArticlePediatric radiology2014
Very early postnatal changes in splanchnic circulation in term infants.
Article in Pediatric radiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
6 authors at 2 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundReversed blood flow has been reported in the superior mesenteric artery (SMA) in 92% of healthy term newborns at 2 h of age. By 24 h after birth the end-diastolic velocity became positive in all of the infants.
objectiveTo characterize hemodynamic changes in the coeliac artery and superior mesenteric artery in healthy term newborns during the first 6 h after birth and to specify the time interval when the negative values of end-diastolic velocity in the superior mesenteric artery become positive. MATERIALS AND
methodsOur study included 30 healthy term newborns. The blood flow velocity was assessed by Doppler ultrasonography at 2 h, 4 h and 6 h after birth.
resultsThe end-diastolic velocity in the superior mesenteric artery changed from negative values at the age of 2 h (-0.9 cm/s, range -13.2 to 0.0) to positive (7.08 cm/s, range 6.3 to 13.5, P < 0.001) at 6 h after birth. In the coeliac artery, the end-diastolic velocity increased during this period, but negative values were not observed (11.8 cm/s, range 9.3 to 13.9 at 2 h and 18.03 cm/s, range 14.2 to 27.6 at 6 h).
conclusionImportant changes occur in splanchnic circulation during the first 6 h after birth. The rise in end-diastolic velocity in the superior mesenteric artery from negative to positive values in 83% of healthy term newborns is the most important change.
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