scholarly journals Derivation of Transthoracic Echocardiographic Reference Ranges for Left Ventricular M-Mode Dimensions in Preterm Infants

2011 ◽  
Vol 70 ◽  
pp. 288-288
Author(s):  
R Warrier ◽  
E S Tan ◽  
A Sehgal ◽  
S A Hope
Keyword(s):  
Preterm Infants ◽  
Left Ventricular ◽  
Reference Ranges

scholarly journals Oxygen saturation and heart rate in healthy term and late preterm infants with delayed cord clamping

2022 ◽  
Author(s):  
Inmaculada Lara-Cantón ◽  
Shiraz Badurdeen ◽  
Janneke Dekker ◽  
Peter Davis ◽  
Calum Roberts ◽  
...  
Keyword(s):  
Oxygen Saturation ◽  
Preterm Infants ◽  
Left Ventricular ◽  
Late Preterm ◽  
Arterial Oxygen ◽  
Reference Ranges ◽  
Delayed Cord Clamping ◽  
Late Preterm Infants ◽  
Cord Clamping ◽  
Neonatal Transition

Abstract Blood oxygen in the fetus is substantially lower than in the newborn infant. In the minutes after birth, arterial oxygen saturation rises from around 50–60% to 90–95%. Initial respiratory efforts generate negative trans-thoracic pressures that drive liquid from the airways into the lung interstitium facilitating lung aeration, blood oxygenation, and pulmonary artery vasodilatation. Consequently, intra- (foramen ovale) and extra-cardiac (ductus arteriosus) shunting changes and the sequential circulation switches to a parallel pulmonary and systemic circulation. Delaying cord clamping preserves blood flow through the ascending vena cava, thus increasing right and left ventricular preload. Recently published reference ranges have suggested that delayed cord clamping positively influenced the fetal-to-neonatal transition. Oxygen saturation in babies with delayed cord clamping plateaus significantly earlier to values of 85–90% than in babies with immediate cord clamping. Delayed cord clamping may also contribute to fewer episodes of brady-or-tachycardia in the first minutes after birth, but data from randomized trials are awaited. Impact Delaying cord clamping during fetal to neonatal transition contributes to a significantly earlier plateauing of oxygen saturation and fewer episodes of brady-and/or-tachycardia in the first minutes after birth. We provide updated information regarding the changes in SpO2 and HR during postnatal adaptation of term and late preterm infants receiving delayed compared with immediate cord clamping. Nomograms in newborn infants with delayed cord clamping will provide valuable reference ranges to establish target SpO2 and HR in the first minutes after birth.

scholarly journals Normal reference ranges for left ventricular dimensions in preterm infants

2014 ◽  
Vol 7 (3) ◽  
pp. 180 ◽  
Author(s):  
Lulu Abushaban ◽  
MariappaThinakar Vel ◽  
Jebaraj Rathinasamy ◽  
PremN Sharma
Keyword(s):  
Preterm Infants ◽  
Left Ventricular ◽  
Reference Ranges ◽  
Normal Reference ◽  
Left Ventricular Dimensions ◽  
Ventricular Dimensions

Reference ranges for sonographic renal dimensions in preterm infants

2013 ◽  
Vol 43 (11) ◽  
pp. 1475-1484 ◽  
Author(s):  
Aydin Erdemir ◽  
Zelal Kahramaner ◽  
Ebru Cicek ◽  
Ebru Turkoglu ◽  
Hese Cosar ◽  
...  
Keyword(s):  
Preterm Infants ◽  
Reference Ranges

scholarly journals Prediction of Extubation Readiness Using Transthoracic Ultrasound in Preterm Infants

2020 ◽  
Author(s):  
Reem M. Soliman ◽  
Yasser Elsayed ◽  
Reem N. Said ◽  
Abdulaziz M. Abdulbaqi ◽  
Rania H. Hashem ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Preterm Infants ◽  
Pulmonary Artery Pressure ◽  
Neonatal Intensive Care ◽  
Ductus Arteriosus ◽  
Interventricular Septum ◽  
Area Under The Curve ◽  
Left Ventricular ◽  
Predictive Values ◽  
Artery Pressure

ABSTRACTObjectiveTo test the hypothesis that a lung ultrasound severity score (LUSsc) and assessment of left ventricular eccentricity index of the interventricular septum (LVEI) by focused heart ultrasound can predict extubation success in mechanically ventilated preterm infants with respiratory distress syndrome (RDS).DesignProspective observational study of premature infants <34 weeks’ of gestation age supported with mechanical ventilation due to RDS. LUSsc and LVEI were performed on postnatal days 3 and 7 by an investigator who was masked to infants’ ventilator parameters and clinical conditions. RDS was classified based on LUSsc into mild (score 0–9) and moderate-severe (score 10–18). A receiver operator curve was constructed to assess the ability to predict extubation success. Pearson’s correlation was performed between LVEI and pulmonary artery pressure (PAP).SettingLevel III neonatal intensive care unit, Cairo, Egypt.ResultsA total of 104 studies were performed to 66 infants; of them 39 had mild RDS (LUSsc 0–9) and 65 had moderate-severe RDS (score ≥10). LUSsc predicted extubation success with a sensitivity and a specificity of 91% and 69%; the positive and negative predictive values were 61% and 94%, respectively. Area under the curve (AUC) was 0.83 (CI: 0.75-0.91). LVEI did not differ between infants that succeeded and failed extubation. However, it correlated with pulmonary artery pressure during both systole (r=0.62) and diastole (r=0.53) and with hemodynamically significant patent ductus arteriosus (r=0.27 and r=0.46, respectively).ConclusionLUSsc predicts extubation success in preterm infants with RDS whereas LVEI correlates with high PAP.

Normal Reference Ranges for Cardiac Valve Annulus in Preterm Infants

2015 ◽  
Vol 37 (1) ◽  
pp. 112-119 ◽  
Author(s):  
Lulu Abushaban ◽  
Mariappa Thinakar Vel ◽  
Jebaraj Rathinasamy ◽  
Prem N. Sharma
Keyword(s):  
Preterm Infants ◽  
Cardiac Valve ◽  
Reference Ranges ◽  
Normal Reference ◽  
Valve Annulus
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