Comparison of two different sites of measurement for transabdominal uterine artery Doppler velocimetry at 11–13 weeks

Abstract

Objectives

Influence of Sampling Site on Uterine Artery Doppler Indices at 11-13⁺⁶ Weeks Gestation

“…They reported the PI measurements were higher at site A than at site B for both the right and left uterine arteries, which is similar to the findings of this study; however, the magnitude of the difference was not reported [21]. No other studies were found that either compared different sampling sites for the uterine arteries in the first trimester or reported results for a sampling site other than the level of the internal cervical os.…”

First Trimester Screening for Preeclampsia and Intrauterine Growth Restriction Using Uterine Artery Doppler and Maternal Serum Placental Growth Factor and Pregnancy Associated Plasma Protein- A

“…These physiological changes convert the spiral arteries from narrow muscular vessels to wide non-muscular channels independent of maternal vasomotor control. In placental dysfunction there is impaired trophoblastic invasion of spiral arteries and this impairment is most marked in PE and IUGR [6,7]. Indirect evidence of impaired placental perfusion in pregnancies destined to develop PE and IUGR has been provided by Doppler studies of the uterine arteries which showed increased PI during both the second and also in the first trimester of pregnancy [8].…”

Comparative Study of Abdominal Versus Transvaginal Ultrasound for Uterine Artery Doppler Velocimetry at 11 to 13 Weeks

“…The first‐trimester uterine artery PI is typically assessed by abdominal Doppler ultrasound (US) at the level of the ascending branch near the internal cervical os . The reproducibility of the technique is moderate and could potentially be improved by using transvaginal US .…”

“…[16][17][18][19][20] The first-trimester uterine artery PI is typically assessed by abdominal Doppler ultrasound (US) at the level of the ascending branch near the internal cervical os. 8,[21][22][23] The reproducibility of the technique is moderate and could potentially be improved by using transvaginal US. 24 However, there is a controversy regarding the similarity of uterine artery PI values between the two approaches.…”