PMID: 3322373Dec 1, 1987Paper

Uterine artery blood velocities during contractions in pregnancy and labour related to intrauterine pressure

British Journal of Obstetrics and Gynaecology
T Janbu, B I Nesheim

Abstract

Doppler recordings from branches of the uterine artery were made simultaneously with intrauterine pressure measurements in eight women in labour. Blood velocities fell and pulsatility index (PI) increased during all 22 contractions studied. Velocities were reduced almost linearly by up to 60% when pressure increased from 0 to 50 mmHg. To study the effect of uterine contractions before labour on uterine blood flow, simultaneous Doppler recordings from branches of the uterine artery and external tocodynamometry were made in seven women during the last trimester. Velocities fell during 18 of the 20 contractions studied (median 35%, range 19-71%). Extrapolating from labour contractions, this corresponds to a pressure increase of 30-40 mmHg. Fetal heart rate (FHR) recordings were normal during all contractions.

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Citations

Mar 1, 1994·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·M TanakaH Nakayama
Sep 13, 2003·European Journal of Obstetrics, Gynecology, and Reproductive Biology·M Mutlu MeydanliAli Haberal
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Sep 11, 2007·American Journal of Obstetrics and Gynecology·Jenny A WestgateAlistair J Gunn
Apr 29, 2015·European Journal of Obstetrics, Gynecology, and Reproductive Biology·Tomas Prior, Sailesh Kumar
Nov 20, 2012·American Journal of Obstetrics and Gynecology·Tomas PriorSailesh Kumar
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May 24, 2015·Obstetrics and Gynecology Clinics of North America·Audra E Timmins, Steven L Clark
Aug 26, 2014·European Journal of Obstetrics, Gynecology, and Reproductive Biology·Tomas Prior, Sailesh Kumar
Jun 5, 2016·European Journal of Obstetrics, Gynecology, and Reproductive Biology·Sarah TwomeySailesh Kumar
Jun 23, 2016·The Journal of Physiology·Christopher A LearAlistair J Gunn
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Apr 8, 2010·The Journal of Maternal-fetal & Neonatal Medicine : the Official Journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians·Miguel A BarberJose A Garcia-Hernandez
Jul 14, 2016·The Journal of Maternal-fetal & Neonatal Medicine : the Official Journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians·Tomas Prior, Sailesh Kumar
Oct 13, 2020·European Journal of Obstetrics, Gynecology, and Reproductive Biology·Jessica TurnerSailesh Kumar
Jul 28, 2019·American Journal of Obstetrics and Gynecology·Jessica M TurnerSailesh S Kumar
Sep 9, 2021·American Journal of Obstetrics & Gynecology MFM·Andrea Dall'Asta, Sailesh Kumar

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