Simultaneous multigate spectral Doppler imaging of the umbilical artery and placental vessels: novel ultrasound technology

Anteby, Eyal Y.; Shen, O.; Cohen, S. M.; Friedman, Zvi; Achiron, R.

doi:10.1046/j.1469-0705.1999.14040256.x

Cited by 26 publications

(15 citation statements)

References 16 publications

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“…Second, in all of these studies Doppler indices were obtained from the umbilical artery whereas in our study they were obtained from multiple locations in the arterial tree of the placenta, using SM-SDI. We believe this is a more sensitive method to detect alterations in the placental circulation 15 . Third, in the previous studies Doppler measurements were obtained before the beginning of exercise and after its conclusion, whereas in the present study all measurements were obtained during the exercise as well as before and after.…”

Section: Discussionmentioning

confidence: 98%

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The influence of maternal exercise on placental blood flow measured by Simultaneous Multigate Spectral Doppler Imaging (SM‐SDI)

Feiner

Weksler

Ohel

et al. 2000

Ultrasound in Obstet & Gyne

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Objective To evaluate the effect of maternal isometric exercise on the placental blood flow as reflected by the velocimetric indices PI and RI derived from placental arteries.Subjects Thirty-four healthy women with normal singleton pregnancies between 22 and 35 weeks of gestation.Methods All subjects underwent an isometric handgrip exercise test. Maternal blood pressure and heart rate together with placental PI and RI were measured at rest, during the exercise and in the post-exercise recovery phase. All Doppler measurements were obtained using the Simultaneous Multigate Spectral Doppler Imaging (SM-SDI) technique, a new ultrasound modality that enables a Doppler study of multiple locations to take place within a very short time.

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Section: Discussionmentioning

confidence: 98%

“…The method of data collection has been described previously 7,15 but is summarized briefly as follows: the operator first selects a region of interest, using the conventional color Doppler image. The spectral Doppler scanning mode is activated.…”

Section: Methodsmentioning

confidence: 99%

The influence of maternal exercise on placental blood flow measured by Simultaneous Multigate Spectral Doppler Imaging (SM‐SDI)

Feiner

Weksler

Ohel

et al. 2000

Ultrasound in Obstet & Gyne

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“…Preeclampsia was defined as systolic blood pressure R140 mm Hg or diastolic blood pressure R90 mm Hg on at least two occasions, and when proteinuria of R300 mg per day was found. Blood flow resistance was measured in the left and right uterine, placental, and umbilical arteries at 24 and at 31 to 33 weeks of gestation by multigate Doppler ultrasonography (15). The test results for common hereditary or acquired thrombophilias in the present study were extracted from the data of our previous study (14).…”

Section: Materials and Methods Patients Definitions And Testsmentioning

confidence: 99%

Plasma levels of microparticles at 24 weeks of gestation do not predict subsequent pregnancy complications

Salomon

Katz

Dardik

et al. 2009

Fertility and Sterility

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“…Preliminary studies on the assessment of the intraplacental Doppler pulsatile indices (PI) during the second and third trimesters have been encouraging [15][16][17]. We have previously shown that the new Doppler method is reliable and can be used for the assessment of the fetoplacental circulation [1].The efficacy of this method in the prediction of adverse pregnancy outcome related to placental pathology has been described previously [17][18][19]. However, the clinical usefulness of the distribution curves of the Doppler indices and the intraplacental Doppler velocimetry indices obtained by the SDIM remain unclear.…”

Section: Introductionmentioning

confidence: 93%

Spectral Doppler Index Mapping of the Umbilicoplacental Circulation and Pregnancy Outcome

Haberman

Bracero

Byrne³

2004

Gynecol Obstet Invest

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Objective: To determine the value of Doppler measurements obtained by a new multigate Doppler modality, the spectral Doppler index mapping (SDIM) technique, to predict adverse outcome among pregnant women with normal conventional umbilical artery (UA) Doppler indices. Design: A cross-sectional prospective cohort study. Subjects: 183 women with well-dated singleton pregnancies who underwent prenatal ultrasound examination between 18 and 40 weeks of gestation were included in the study. At the time of the initial Doppler examination, all patients had normal UA and uterine artery Doppler indices, size appropriate for gestational age, no evidence of fetal anomalies or fetal distress. Methods: SDIM data included the distribution curves of the pulsatility indices (PI) as well as the mean of the PI detected in the placenta and in the umbilical cord. The mean PI values were also calculated using conventional spectral Doppler sonography. Logistic regression analysis was used to control for gestational age while assessing various Doppler variables in predicting outcome. Results: Adverse outcomes occurred in 26.6% of the pregnancies. In pregnancies with adverse outcome, the umbilicoplacental PI gradient was significantly lower (0.10 vs. 0.28, p < 0.003), the maximum intraplacental PI value was higher (1.28 vs. 1.16, p = 0.031), and there was a greater proportion with skewed UA distribution curves. Using forward stepwise logistic regression to compare the predictive value of the conventional Doppler ultrasound with SDIM, we found that the most accurate predictors of adverse outcome were the maximum intraplacental PI value (p < 0.028), skewed distributions (p = 0.002) and the gradient between the umbilical and intraplacental PI distributions (p = 0.006). Conclusions: Our results suggest that the SDIM system may enhance the ability of Doppler technology to predict obstetrical outcomes in patients with normal UA Doppler indices.

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Simultaneous multigate spectral Doppler imaging of the umbilical artery and placental vessels: novel ultrasound technology

Cited by 26 publications

References 16 publications

The influence of maternal exercise on placental blood flow measured by Simultaneous Multigate Spectral Doppler Imaging (SM‐SDI)

The influence of maternal exercise on placental blood flow measured by Simultaneous Multigate Spectral Doppler Imaging (SM‐SDI)

Plasma levels of microparticles at 24 weeks of gestation do not predict subsequent pregnancy complications

Spectral Doppler Index Mapping of the Umbilicoplacental Circulation and Pregnancy Outcome

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