Adrenal Endocrine and Circulatory Responses to Acute Prolonged Asphyxia in Surviving and Non-Surviving Fetal Sheep near Term

  • A. Jensen
  • H. Gips
  • M. Hohmann
  • W. Künzel

Abstract

A previous study on the effects of acute prolonged asphyxia produced some interesting results on the changes in blood flow of surviving and non-surviving fetal sheep near term (Jensen et al. 1985, 1987). It revealed that fetal circulatory centralization during acute asphyxia is a rapid process in which blood flow to peripheral organs falls and that to central organs increases after 1 and 2 min asphyxia respectively. That study also demonstrated that the ability of the fetal circulation to maintain centralization throughout asphyxia is essential for survival, because circulatory decentralization on the nadir of asphyxia always preceded fetal death. These observations and the fact that in non-surviving fetuses adrenal blood flow failed to increase during asphyxia suggested that adrenal function and fetal survival of acute prolonged asphyxia might be interrelated. However, since non-surviving fetuses were more asphyxic than surviving fetuses, the possibility also had to be considered that severe hypoxaemia and acidaemia may have direct adverse effects on the maintenance of circulatory centralization and hence may reduce the fetus’ chances of surviving asphyxia.

Keywords

Catheter Corticosteroid Prostaglandin Androgen Oestradiol 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Creasy RK, Drost M, Green MV, Morris JA (1970) Determination of fetal, placental and neonatal blood volumes in sheep. Circ Res 27: 487–497PubMedGoogle Scholar
  2. Da Prada M, Zürcher G (1976) Simultaneous radioenzymatic determination of plasma and tissue adrenaline, noradrenaline and dopamine within the femtomole range. Life Sci 19: 1161–1174PubMedCrossRefGoogle Scholar
  3. Gips H (1983) Die Funktion der mütterlichen Nebennierenrinde in der Schwangerschaft und im Wochenbett. Thesis, University of GießenGoogle Scholar
  4. Heymann MA, Payne BD, Hoffman JIE, Rudolph AM (1977) Blood flow measurements with radionuclide-labeled particles. Prog Cardiovasc Dis 20: 55–79PubMedCrossRefGoogle Scholar
  5. Jensen A, Künzel W, Hohmann M (1985) Dynamics of fetal organ blood flow redistribution and catecholamine release during acute asphyxia. In: Jones CT, Nathanielsz PW (eds) The physiological development of the fetus and newborn. Academic, London, pp 405–410Google Scholar
  6. Jensen A, Hohmann M, Künzel W (1987) Dynamic changes in organ blood flow and oxygen consumption during acute asphyxia in fetal sheep. J Devel Physiol 9: 543–559Google Scholar
  7. Liggins GC (1980) Etiology of premature labor. Mead Johnson Symp Perinat Dev Med 15: 3–7PubMedGoogle Scholar
  8. Rudolph AM, Heymann MA (1967) The circulation of the fetus in utero: methods for studying distribution of blood flow, cardiac output and organ blood flow. Circ Res 21:163–184PubMedGoogle Scholar
  9. Winkler B, Stämmler G, Schaper W (1982) Measurement of radioactive tracer microsphere blood flow with NaJ (Tl)- and Ge-well type detectors. Basic Res Cardiol 77: 292–300PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • A. Jensen
    • 1
  • H. Gips
  • M. Hohmann
  • W. Künzel
  1. 1.Department of Obstetrics and GynaecologyJustus-Liebig-Universität GießenGiessenFederal Republic of Germany

Personalised recommendations