Fetal blood velocity waveforms in uncomplicated labour

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 w...

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Bibliographic Details
Published inBritish journal of obstetrics and gynaecology Vol. 88; no. 9; p. 865
Main Authors Stuart, B, Drumm, J, FitzGerald, D E, Duignan, N M
Format Journal Article
LanguageEnglish
Published England 01.09.1981
Subjects
Analgesics - pharmacology
Anesthesia, Obstetrical
Blood Flow Velocity
Extraembryonic Membranes
Female
Fetal Blood - physiology
Humans
Labor, Obstetric
Oxytocin - pharmacology
Placenta - blood supply
Pregnancy
Ultrasonography
Uterine Contraction
Vascular Resistance - drug effects
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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.
ISSN:0306-5456
1365-215X
DOI:10.1111/j.1471-0528.1981.tb02220.x