Neonatal Hemodynamics
Neonatal Hemodynamics - Related Videos
09:31
Hemodynamic Precision in the Neonatal Intensive Care Unit using Targeted Neonatal Echocardiography
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Cited by 6 •
2023
Presented here is a protocol to perform comprehensive neonatal echocardiography by trained neonatologists in the neonatal intensive care unit. The trained individuals provide longitudinal assessments of heart function, systemic and pulmonary hemodynamics in a consultative role. The manuscript also describes the requirements to become a fully trained neonatal hemodynamics specialist.
11:39
Non-invasive Optical Measurement of Cerebral Metabolism and Hemodynamics in Infants
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Cited by 49 •
2013
We combined frequency-domain near-infrared spectroscopy measures of cerebral hemoglobin oxygenation with diffuse correlation spectroscopy measures of cerebral blood flow index to estimate an index of oxygen metabolism. We tested the utility of this measure as a bedside screening tool to evaluate the health and development of the newborn brain.
06:27
Transcutaneous Microcirculatory Imaging in Preterm Neonates
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Cited by 6 •
2015
Microcirculatory imaging (MI) is used to monitor peripheral perfusion in critically ill or preterm neonates. This manuscript and video demonstrates the optimal approach for obtaining high-quality images.
10:36
A Swine Model of Neonatal Asphyxia
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Cited by 50 •
2011
Large animal models have good translational values in the examination of physiology and pharmacology of neonatal asphyxia. Using newborn piglets, we develop an experimental protocol to simulate neonatal asphyxia which has advantages of studying the systemic and regional hemodynamics, oxygen transport with biochemical and pathologic pathways and correlations.
08:09
A Novel Ex Ovo Banding Technique to Alter Intracardiac Hemodynamics in an Embryonic Chicken System
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Cited by 2 •
2016
For the first time we present here a reproducible banding procedure to alter hemodynamics in the developing heart ex ovo. This is achieved by partially constricting the outflow tract (OFT).
FAQs
The pivotal early change is expansion of the lungs, which lowers pulmonary vascular resistance. As resistance falls, pulmonary blood flow increases and the pressure gradients between the pulmonary and systemic circulations shift. These changes redirect circulation away from the fetal pattern and establish the postnatal hemodynamic environment that clinicians evaluate in newborns.
The ductus arteriosus and foramen ovale are fetal pathways whose flow is affected by changing pressure gradients after birth. With increased pulmonary blood flow and altered circulation, these pathways close or become less functionally important. Their persistence or altered behavior can therefore influence assessment of newborn circulation, including evaluation for a patent ductus arteriosus.
Pressure gradients determine how blood is distributed between the pulmonary and systemic circulations. After birth, the fall in pulmonary vascular resistance and rise in pulmonary blood flow change these gradients, influencing fetal pathway closure or reduction. Understanding this relationship helps clinicians interpret abnormal circulation associated with pulmonary hypertension, patent ductus arteriosus, or ventricular dysfunction.
Premature and critically ill infants may require close assessment of cardiac output, blood pressure, oxygen delivery, and tissue perfusion during the transition to postnatal circulation. These measures help identify whether circulation is supporting organ function. The same framework is relevant when evaluating conditions such as shock, pulmonary hypertension, or ventricular dysfunction.
A neonatal hemodynamic evaluation examines cardiac output, blood pressure, oxygen delivery, and tissue perfusion. Together, these findings indicate how effectively the cardiovascular system moves blood and supports organs. Clinicians use the information to support diagnosis and management, particularly when newborns have suspected shock, pulmonary hypertension, patent ductus arteriosus, or ventricular dysfunction.
The assessment provides physiologic context for diagnosing and managing several newborn conditions. In pulmonary hypertension, it helps relate pulmonary vascular resistance and pulmonary blood flow to circulation. For patent ductus arteriosus, it supports evaluation of a persistent fetal pathway. In shock or ventricular dysfunction, cardiac output, blood pressure, oxygen delivery, and organ perfusion guide clinical interpretation.