Observation on Cardiac Opening of the Inferior Vena Cava in Goat Fetuses

作     者：Jie ZHANG Jinlong ZHANG 

作者机构：Department of CardiologyEastern Theater General HospitalNanjing 210002China Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses/College of Veterinary MedicineYangzhou UniversityYangzhou 225009China 

出 版 物：《Agricultural Biotechnology》 (农业生物技术（英文版）)

年 卷 期：2019年第8卷第6期

页      面：138-139页

学科分类：0710[理学-生物学] 07[理学] 09[农学] 

基　　金：Supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD) Scientific Research Fund of Nanjing General Hospital of Nanjing Military Command,China(2016033) 

主　　题：Fetal circulation Inferior vena cava Foramen ovale Interatrial foramen 

摘      要：[Objectives] This study was conducted to better understand the characteristics of the fetal blood circulation. [Methods] The cardiac opening of the inferior vena cava was observed in goat fetuses. There are two cardiac openings of the inferior vena cava, namely, the foramen ovale with the valves and the right atrium opening of the inferior vena cava. The blood from the inferior vena cava moves easily into the right atrium via the right atrium opening because the right atrium opening without the valves is located in the lower right of the foramen ovale, and is bigger than the interatrial foramen. [Results] The blood may flow into the left atrium through the foramen ovale when the blood volume into the right atrium exceeds the limit of the right atrium. The fetal inferior vena cava compared with after birth receives oxygenated blood in the umbilical vein from the placenta besides the normal blood. Accordingly the blood volume into the right atrium exceeds the limit of the right atrium. Extra oxygenated blood is diverted directly into the left atrium through the foramen ovale. [Conclusions] This study provides a reference for studying the blood circulation of fetuses and even adults.