Title: Measurement of human umbilical venous blood flow in utero
Abstract: The circulation of fetal blood through the umbilical cord and the placenta is clearly a vital link in the intrauterine support of the fetus. This chapter discusses a study to elaborate the measurement of human umbilical venous blood flow in utero. Umbilical venous flow as a function of gestational age in 118 normal pregnancies ranging from 22 weeks' gestation to term was shown. The flow rate increases steadily with gestation until a maximum is reached at about 38 weeks, after which there is a reduction. It is found that when the flow rate is divided by the estimated fetal weight, the results are obtained. The flow per kilogram decreases steadily from an average of 130 ml/kg per minute at 28 weeks to 70 ml/kg per minute at Of the fetuses in which some low values of flow were measured, one-third were small for dates, whereas only 8% of the remainder were small for dates. Furthermore, if these small-for-dates babies are examined for their perinatal outcome, it is found that the morbidity and mortality rates were 45% and 23%, respectively among those with low flow values, whereas there was neither morbidity nor mortality among the remaining 13 small-for-dates babies.
Publication Year: 1986
Publication Date: 1986-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
Access and Citation
Cited By Count: 1
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot