Intraobserver reproducibility of transvaginal Doppler measurements in uterine and intraovarian arteries in regularly menstruating women

Tekay, Aydin; Jouppila, P.

doi:10.1046/j.1469-0705.1996.07020129.x

Cited by 30 publications

(21 citation statements)

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“…The reproducibility of the assessment of uterine vasculature by Doppler ultrasonography has been shown to be good [28]. The main problem in the measurement of absolute blood velocities is the angle between the vessel and the Doppler beam.…”

Section: Discussionmentioning

confidence: 99%

Uteroplacental Hemodynamics during Early Human Pregnancy: A Longitudinal Study

Mäkikallio

Tekay

Jouppila

2004

Gynecol Obstet Invest

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Background: To determine normal physiologic changes in the uteroplacental hemodynamics during early placental development in the first trimester of pregnancy. Methods: Sixteen normal singleton pregnancies were included in this longitudinal study. Transvaginal Doppler ultrasonographic examinations of uterine, arcuate, radial and spiral arteries were performed at the 5th, 7th, 8th and 10th completed gestational weeks. Peak systolic velocity (PSV), time-averaged maximum velocity (TAMXV) and the pulsatility index (PI) were measured. Results: Uterine artery PSV, TAMXV and PI remained unchanged from the 5th to the 8th week of gestation. From the 8th to the 10th week, PSV (p = 0.02) and TAMXV (p = 0.005) increased and PI decreased (p = 0.006). Changes in the arcuate arteries were similar to those in uterine arteries. No significant changes in PSV, TAMXV or PI of the radial artery were noticed. Spiral artery PSV (p = 0.02) and TAMXV (p = 0.02) increased from the 5th to the 7th week. Thereafter they remained unchanged. Spiral artery PI decreased from the 5th to the 10th week, (p = 0.004). Throughout the study period, the PSV, TAMXV and PI values were significantly higher in the uterine artery than in the arcuate artery, and in the arcuate artery compared with the radial artery. At the 5th gestational week, no differences in PSV and TAMXV were found between radial and spiral arteries. From the 7th gestational week onwards, PSV and TAMXV were significantly lower in the radial artery than in the spiral artery. However, the PI values in the radial artery were significantly higher compared with those in the spiral artery during the whole study period. Conclusions: Spiral artery impedance decreases and blood flow velocities increase as early as between the 5th and the 7th weeks of gestation. During that period, the uterine and arcuate artery hemodynamics remain unchanged. In the uterine and arcuate arteries, decreases in impedance and increases in absolute velocities are detected after the 8th week of gestation. This delay between the changes in the spiral and uterine arteries may represent the magnitude of the increase of placental volume and spiral arterial involvement which is needed to affect uterine hemodynamics.

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Section: Discussionmentioning

confidence: 99%

Uteroplacental Hemodynamics during Early Human Pregnancy: A Longitudinal Study

Mäkikallio

Tekay

Jouppila

2004

Gynecol Obstet Invest

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“…They have been used to study uterine and ovarian blood flow changes in normal cycles, 7-23 during ovulation induction, 24 and after IVF-ET attempts. 8,16,19,21,23,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] …”

Section: Discussionmentioning

confidence: 99%

Polycystic ovarian syndrome: assessment with color Doppler angiography and three-dimensional ultrasonography.

Dolz

Osborne

Blanes

et al. 1999

Journal of Ultrasound in Medicine

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We conducted a three‐dimensional ultrasonographic evaluation of the size and structure of the ovaries of women who had clinical and biochemical findings suggestive of polycystic ovary syndrome. We carried out a comparative color Doppler frequency and color Doppler amplitude study of the vascular patterns of these ovaries. This study involved 65 women of reproductive age with polycystic ovary syndrome and 25 eumenorrheic women who were not taking hormonal contraceptives and who had a body mass index below 25 kg/m2. Compared to controls, women with polycystic ovary syndrome had larger ovaries and thicker stroma, increased impedance in the uterine arteries, increased stromal vascularity with decreased impedance that persisted throughout the menstrual cycle, and a lack of luteal conversion.

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“…Blood flow was estimated using two impedance indices: resistance index (RI) and pulsatility index (PI) defined as follows: RI ϭ systolic Ϫ end diastolic peak velocity/systolic peak velocity; PI ϭ systolic Ϫ end diastolic peak velocity/time-averaged maximum velocity (17). For each impedance index, two measurements were taken from left and right arteries, respectively; each side's index was calculated using the mean of the two, and further analyses used the mean of both sides (18).…”

Section: Sonographic Assessmentmentioning

confidence: 99%