z-logo
Premium
Blood flow velocity waveforms from the fetal external iliac artery as a measure of lower extremity vascular resistance
Author(s) -
STEWART P. A.,
WLADIMIROFF J. W.,
STIJNEN T.
Publication year - 1990
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.1471-0528.1990.tb01830.x
Subject(s) - umbilical artery , vascular resistance , medicine , blood flow , cardiology , gestation , fetus , diastole , external iliac artery , gestational age , artery , uterine artery , hemodynamics , pregnancy , anatomy , blood pressure , biology , genetics
Summary. Blood flow velocities were recorded in the external iliac artery (EIA) and umbilical artery (UA) in 94 normal pregnancies and in 14 with intrauterine growth retardation (IUGR) between 25 and 36 weeks gestation. In normal pregnancy the pulsatility index (PI) in both vessels decreased significantly with advancing gestational age, reflecting a reduction in lower extremity and placental vascular resistance. The EIA PI/UA PI ratio also decreased significantly with gestational age suggesting that vascular resistance is more pronounced in the lower extremities. In the pregnancies with IUGR, PI values from both vessels were nearly always above the upper limit (+2 SD) of the normal curve reflecting increased vascular resistance at lower extremity and placental level. In two pregnancies, absent end‐diastolic flow velocities in the umbilical artery were associated with reversed end‐diastolic flow velocities in the external iliac artery.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here