Matsuura T
Department of Obstetrics and Gynecology, Akita University, School of Medicine.
Nihon Sanka Fujinka Gakkai Zasshi. 1989 Sep;41(9):1373-9.
This study was performed to determine the relation among the reverse flow signal of tricuspid valve, fetal heart rate pattern and uterine contraction. The blood flow signal through the tricuspid valve was continuously recorded with color flow mapping and direct fetal electrocardiogram as well as uterine contraction in 17 human fetuses during labor. Gestational ages ranged from 36 to 41 weeks. No fetus had a congenital heart anomaly. The detection rate of the reverse flow signal at the tricuspid valve was 100% in variable deceleration, 33% in late deceleration, 5% in normocardia and none in early deceleration. In investigation of the time relation between the reverse flow signal and variable deceleration, the reverse flow signal started after the onset of the recovery phase of deceleration. The tricuspid reverse flow, which was observed in variable deceleration, was caused by an increase in the venous return when cord compression disappeared at the onset of the recovery phase of variable deceleration.
本研究旨在确定三尖瓣反流信号、胎儿心率模式和子宫收缩之间的关系。在17例分娩期人类胎儿中，采用彩色血流图、直接胎儿心电图以及子宫收缩监测，持续记录通过三尖瓣的血流信号。孕周为36至41周。无胎儿患有先天性心脏异常。三尖瓣反流信号的检出率在变异减速时为100%，晚期减速时为33%，正常心搏时为5%，早期减速时无反流信号。在研究反流信号与变异减速的时间关系时，反流信号在减速恢复期开始后出现。变异减速时观察到的三尖瓣反流是由于在变异减速恢复期开始时脐带压迫消失，静脉回流增加所致。
