Fetal circulation

Fetal circulation and changes during birth

1. Fetal Circulation Om Prakash Bhatta Institute of Medicine, Nepal

2. Objective : To describe the fetal circulation. To list the changes that take place in the circulation at birth.

3. Fetal Circulation

4. Placenta acts as the organ for gaseous exchange. Lungs non-functional. Mixing of blood occurs

5. Circulatory Changes Decreased pulmonary resistance Closure of : Umbilical artery and vein Ductus venosus Foramen ovale Ductus arteriosus

6. Circulatory changes Remnants of fetal circulation

7. Correlations Placental abruption Rh factor incompatibility Anemias Teratogen exposure Pre eclampsia and eclampsia

8. References Langman’s Medical Embryology, 12 th edition Guyton and Hall Textbook of Medical Physiology, SA edition Robbins and Cotran Pathologic Basis of Disease, 9 th edition

9. Thank you !!