<abstract xmlns="http://www.w3.org/1999/xhtml"><p> Significant hemodynamic changes happen in the abdominal region at the moment of birth and during the first week of life in premature newborns. The aim of the study was to assess early postnatal changes of Doppler sonographic blood flow parameters in the superior mesenteric artery (SMA) occurring during the first three days of life in late preterm infants. 10 infants were enrolled into the prospective study. Abdominal blood flow velocities (ABFV) in the SMA were obtained at the age of 2, 24 and 72 hours (h), before feeding. Screening parameters included the peak systolic velocity (PSV), end-diastolic velocity (EDV), time-averaged mean velocity (TAMV). Doppler indices (DI) - resistance index (RI) and pulsatility index (PI) were calculated. EDV changed significantly from 2 h to 24 h [-13.08 cm/s (-20.46 - -9.34) to 12.79 cm/s (11.83 - 24.72); p &lt; 0.01] with a further statistically insignificant increase within 72 h [12.79 cm/s (11.83 - 24.72) to 17.90 cm/s (16.93 - 19.25)]. The EDV values were negative in 9 out of l0 neonates at 2 h of age. The SMA PSV showed a daily increase from 2 h to 72 h. The ABFV and characteristics of vascular resistance (DI) in the SMA change significantly in near term infants within the first 3 days. At 2 h of age a negative blood flow and elevated parameters characterizing vascular resistance were documented in the superior mesenteric artery.</p></abstract>

Significant hemodynamic changes happen in the abdominal region at the moment of birth and during the first week of life in premature newborns. The aim of the study was to assess early postnatal changes of Doppler sonographic blood flow parameters in the superior mesenteric artery (SMA) occurring during the first three days of life in late preterm infants. 10 infants were enrolled into the prospective study. Abdominal blood flow velocities (ABFV) in the SMA were obtained at the age of 2, 24 and 72 hours (h), before feeding. Screening parameters included the peak systolic velocity (PSV), end-diastolic velocity (EDV), time-averaged mean velocity (TAMV). Doppler indices (DI) - resistance index (RI) and pulsatility index (PI) were calculated. EDV changed significantly from 2 h to 24 h [-13.08 cm/s (-20.46 - -9.34) to 12.79 cm/s (11.83 - 24.72); p < 0.01] with a further statistically insignificant increase within 72 h [12.79 cm/s (11.83 - 24.72) to 17.90 cm/s (16.93 - 19.25)]. The EDV values were negative in 9 out of l0 neonates at 2 h of age. The SMA PSV showed a daily increase from 2 h to 72 h. The ABFV and characteristics of vascular resistance (DI) in the SMA change significantly in near term infants within the first 3 days. At 2 h of age a negative blood flow and elevated parameters characterizing vascular resistance were documented in the superior mesenteric artery.

Early Postnatal Changes in the Superior Mesenteric Artery Blood Flow Parameters in Late Preterm Newborns - A Pilot Study

Clinic of Neonatology, University Hospital Martin, Kollarova Str. N. 2, 036 59 Martin, Slovak Republic Phone: ++421/4203641

Department of Neonatology, Jessenius Faculty of Medicine, Comenius University and University Hospital in Martin, Slovak Republic

Acta Medica Martiniana

Significant hemodynamic changes happen in the abdominal region at the moment of birth and during the first week of life in premature newborns. The aim of the...

Early Postnatal Changes in the Superior Mesenteric Artery Blood Flow Parameters in Late Preterm Newborns - A Pilot Study

Published Online: May 14, 2013

Page range: 27 - 32

DOI: https://doi.org/10.2478/acm-2013-0009

Keywords
late-preterm newborn, superior mesenteric artery, splanchnic circulation, Doppler ultrasonography

This content is open access.

Early Postnatal Changes in the Superior Mesenteric Artery Blood Flow Parameters in Late Preterm Newborns - A Pilot Study

Published Online: May 14, 2013

Page range: 27 - 32

DOI: https://doi.org/10.2478/acm-2013-0009

Keywordslate-preterm newborn, superior mesenteric artery, splanchnic circulation, Doppler ultrasonography

This content is open access.

Keywords
late-preterm newborn, superior mesenteric artery, splanchnic circulation, Doppler ultrasonography