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Hyperammonemia associated with perinatal asphyxia.

R N Goldberg, L A Cabal, F R Sinatra

    Pediatrics
    |September 1, 1979
    PubMed
    Summary
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    Severe perinatal asphyxia in infants can lead to high blood ammonia levels (hyperammonemia). This condition is linked to neurological issues and abnormal vital signs in both survivors and those who did not survive.

    Area of Science:

    • Neonatal Medicine
    • Biochemistry

    Background:

    • Perinatal asphyxia is a significant cause of neonatal mortality and morbidity.
    • Elevated ammonia levels in neonates can indicate metabolic disturbances.

    Purpose of the Study:

    • To investigate the association between hyperammonemia and clinical presentation in infants with severe perinatal asphyxia.
    • To identify potential neurological sequelae related to hyperammonemia in this population.

    Main Methods:

    • Retrospective analysis of twelve infants with severe perinatal asphyxia.
    • Measurement of blood ammonia levels.
    • Clinical assessment of neurological status, body temperature, blood pressure, and heart rate patterns.

    Main Results:

    • All twelve infants presented with elevated blood ammonia levels.

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  • Survivors (n=7) exhibited CNS irritability, hyperthermia, hypertension, and variable heart rate oscillations.
  • Non-survivors (n=5) showed CNS depression, hyperthermia, hypertension, and a fixed heart rate.
  • Five of seven survivors developed severe neurological dysfunction.

    • Conclusions:

    • Hyperammonemia is a common finding in infants with severe perinatal asphyxia.
    • Clinical signs such as CNS irritability/depression, hyperthermia, and hypertension may be linked to hyperammonemia.
    • Hyperammonemia may contribute to the severe neurological dysfunction observed in these infants.