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FETAL BLOOD VELOCITY WAVEFORMS IN UNCOMPLICATED LABOUR
Author(s) -
Stuart B.,
Drumm J.,
Fitzgerald D. E.,
Duignan N. M.
Publication year - 1981
Publication title -
bjog: an international journal of obstetrics and gynaecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.157
H-Index - 164
eISSN - 1471-0528
pISSN - 1470-0328
DOI - 10.1111/j.1471-0528.1981.tb02220.x
Subject(s) - fetus , waveform , medicine , obstetrics , cardiology , pregnancy , computer science , biology , telecommunications , genetics , radar
Summary A combination of pulsed echo and continuous wave Doppler ultrasound was used to obtain blood flow velocity signals from the umbilical arteries of 10 patients during uncomplicated spontaneous labour. Audio frequency analysis of these signals yielded fetal blood velocity waveforms. Analysis of these waveforms demonstrated that placental vascular resistance to feto‐placental blood flow is not altered by uterine contractions, artificial rupture of the membranes, the infusion of oxytocin nor the administration of analgesia during uncomplicated labour.