Diagnosis of asphyxia in premature babiesDDiagnosis of asphyxia in premature babiesDiagnosis of asphyxia in premature babiesEnglishNeonatology;NeurologyPremature;Newborn (0-28 days);Baby (1-12 months)BrainNervous systemNAPrenatal Adult (19+)NA2009-10-31T04:00:00ZHilary Whyte, MSc, MB, BCh, BAO, MRCPI, FRCPC12.000000000000036.0000000000000456.000000000000Flat ContentHealth A-Z<p>Read about the diagnosis of asphyxia in premature infants. Asphyxia has many causes and a diagnosis often requires a head ultrasound (HUS).</p><p>Asphyxia is an inadequate delivery of oxygen to the brain. There are many causes of asphyxia and a diagnosis often requires a head ultrasound (HUS).</p><h2>Key points</h2> <ul><li>Asphyxia is an inadequate delivery of oxygen to the brain.</li> <li>Asphyxia can be caused by reduced blood flow in the womb; low maternal blood pressure; placental abruption; and reduced oxygen flow during labour.</li> <li>Diagnostic techniques such as head ultrasound (HUS), CT scan and MRI will reveal areas of the brain that have been affected.</li></ul>
Diagnostic de l’asphyxie chez les bébés prématurésDDiagnostic de l’asphyxie chez les bébés prématurésDiagnosis of asphyxia in premature babiesFrenchNeonatology;NeurologyPremature;Newborn (0-28 days);Baby (1-12 months)BrainNervous systemNAPrenatal Adult (19+)NA2009-10-31T04:00:00ZHilary Whyte, MSc, MB, BCh, BAO, MRCPI, FRCPC12.000000000000036.0000000000000456.000000000000Flat ContentHealth A-Z<p>Lisez au sujet du diagnostic de l’asphyxie chez les bébés prématurés. L’asphyxie a plusieurs causes et un diagnostic requiert souvent l’utilisation d’une échographie transfontanelle.<br></p><p>L’asphyxie est une carence dans l’apport d’oxygène au cerveau. Il existe de nobreux causes d'asphyxie et un diagnositic nécessite souvent une l’échographie transfontanelle.</p><h2>À retenir</h2> <ul><li>L’asphyxie est une carence dans l’apport d’oxygène au cerveau.</li> <li>L’asphyxie peut être causée par une réduction de l’apport en sang dans l’utérus, par une tension artérielle faible chez la mère et une réduction de l’apport en oxygène durant l’accouchement.</li> <li>Les techniques diagnostiques telles que l’échographie transfontanelle, la tomodensitométrie (TDM) et l’imagerie par résonance magnétique (IRM) révèleront les zones du cerveau qui ont été atteintes.</li></ul>

 

 

Diagnosis of asphyxia in premature babies1808.00000000000Diagnosis of asphyxia in premature babiesDiagnosis of asphyxia in premature babiesDEnglishNeonatology;NeurologyPremature;Newborn (0-28 days);Baby (1-12 months)BrainNervous systemNAPrenatal Adult (19+)NA2009-10-31T04:00:00ZHilary Whyte, MSc, MB, BCh, BAO, MRCPI, FRCPC12.000000000000036.0000000000000456.000000000000Flat ContentHealth A-Z<p>Read about the diagnosis of asphyxia in premature infants. Asphyxia has many causes and a diagnosis often requires a head ultrasound (HUS).</p><p>Asphyxia is an inadequate delivery of oxygen to the brain. There are many causes of asphyxia and a diagnosis often requires a head ultrasound (HUS).</p><h2>Key points</h2> <ul><li>Asphyxia is an inadequate delivery of oxygen to the brain.</li> <li>Asphyxia can be caused by reduced blood flow in the womb; low maternal blood pressure; placental abruption; and reduced oxygen flow during labour.</li> <li>Diagnostic techniques such as head ultrasound (HUS), CT scan and MRI will reveal areas of the brain that have been affected.</li></ul><p>Asphyxia is an inadequate delivery of oxygen to the brain. This lack of oxygen can be detected with tests. Additionally, when the blood has been low in oxygen over time, it begins to show other abnormal signs. For example, the blood will become acidic, which can also be detected with blood tests. </p><p>The effect of asphyxia generally depends on how long the premature baby has been deprived of oxygen.</p><p>Asphyxia has many possible causes. It can occur in the womb, during labour, or immediately after birth. In the womb, the fetus’s oxygen needs are met entirely with oxygen extracted from the mother’s blood and delivered via the placenta and umbilical cord. In the womb, asphyxia can occur due to: </p><ul><li>blockage or squeezing of the umbilical cord, reducing blood flow </li><li>low maternal blood pressure </li><li>a tear or separation of the placenta from the womb, called a placental abruption </li></ul><p>During birth, asphyxia may occur depending on how labour progresses. The causes are similar to those that can take place in the womb. During labour, particularly a long and difficult one, oxygen flow to the premature baby can be interrupted due to a squeezed umbilical cord or the placenta may detach prematurely, cutting off the oxygen supply. </p><p>At birth and immediately after, signs of asphyxia include abnormal activity in the central nervous system, which may be either depressed or hyperactive. A lack of oxygen to the brain will also produce metabolic changes, specifically in glucose and lactic acid. </p><p>Although the brain can withstand short periods with insufficient oxygen, over time it will develop cell damage due to lack of oxygen, known as hypoxic-ischemic encephalopathy. Tests are performed to find out to what extent the lack of oxygen has affected the cells of the brain. The baby’s condition in this regard will be classified from mild to moderate to severe. </p><p>Diagnosis will become more complete with more intensive investigations focused on structure and function of the brain. Diagnostic techniques such as head ultrasound (HUS), computed tomography (CT) scan, and magnetic resonance imaging (MRI) will provide images that reveal areas of the brain that have been affected. An electroencephalogram (EEG) will be done to determine the amount and quality of brain activity. Additional tests may also be performed, focusing on the premature baby’s sensory responses. Tests on hearing and sight, for example, may give an indication that damage has or has not occurred to cells within the brain. </p><p>More information:<br></p><ul><li> <a href="/Article?contentid=1772&language=English">Asphyxia </a></li><li> <a href="/Article?contentid=1846&language=English">Treatment of asphyxia</a> </li></ul>Diagnosis of asphyxia in premature babies

Thank you to our sponsors

AboutKidsHealth is proud to partner with the following sponsors as they support our mission to improve the health and wellbeing of children in Canada and around the world by making accessible health care information available via the internet.