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The vasopressin response to severe birth asphyxia
A Smith1, P Prakash, J Nesbitt
1Department of Child Health, St George's Hospital and Medical School, London, U.K.
Early Human Development
|June 1, 1990
Summary
Low urinary arginine vasopressin (AVP) levels in newborns experiencing severe birth asphyxia correlated with normal development. High AVP levels were linked to poor outcomes, including death.
Area of Science:
- Neonatal Medicine
- Endocrinology
- Perinatal Asphyxia Research
Background:
- Birth asphyxia is a critical condition in newborns.
- Arginine vasopressin (AVP) plays a role in fluid balance and stress response.
Purpose of the Study:
- To investigate the relationship between arginine vasopressin (AVP) levels and outcomes in infants with severe birth asphyxia.
- To assess the correlation between plasma and urinary AVP and plasma osmolality.
Main Methods:
- Serial measurements of urinary and plasma arginine vasopressin (AVP) were performed in six newborns with severe birth asphyxia.
- Plasma osmolality was also evaluated.
- Urinary AVP excretion was standardized for creatinine content.
Main Results:
- A significant negative correlation was found between plasma AVP and plasma osmolality (r = -0.52, P = 0.0012).
- No significant correlation was observed between plasma AVP and urinary AVP excretion.
- Infants with consistently low urinary AVP levels showed normal development.
- Infants with consistently high urinary AVP levels experienced mortality or severe developmental abnormalities.
Conclusions:
- Urinary AVP levels in the early days of life may serve as a prognostic marker for neurodevelopmental outcomes in infants with severe birth asphyxia.
- Consistently low urinary AVP is associated with favorable outcomes, while high levels indicate a poor prognosis.