Longo L D
Loma Linda University, California 92305.
Rev Mal Respir. 1988;5(3):197-206.
Fetal oxygenation depends on that of the mother by the intermediary of the placenta. The respiratory feto-maternal gas exchanges are reviewed as are the regulatory factors. The greater part of the data reported here comes from experimentation of pregnant animals near term. The most important parameters for fetal oxygenation are the maternal and fetal O2 partial pressures, the affinity of the blood for oxygen, the maternal and fetal placental blood flow and the quantity of CO2 exchanged. Finally, placental efficiency as regards gas exchanges is compared to the lung.
胎儿的氧合作用通过胎盘这一中介依赖于母体的氧合作用。本文回顾了胎儿与母体之间的呼吸性气体交换以及调节因素。这里报告的大部分数据来自对接近足月的怀孕动物的实验。胎儿氧合作用的最重要参数是母体和胎儿的氧分压、血液对氧气的亲和力、母体和胎儿的胎盘血流量以及交换的二氧化碳量。最后，将胎盘在气体交换方面的效率与肺进行了比较。
