Nomograms of Iranian fetal middle cerebral artery Doppler waveforms and uniformity of their pattern with other populations' nomograms

doi:10.1186/1471-2393-8-50

BMC Pregnancy and Childbirth

Volume 8

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Tarzamni MK
Nezami N
Sobhani N
Eshraghi N
Tarzamni M
Talebi Y

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Nezami N
Sobhani N
Eshraghi N
Tarzamni M
Talebi Y
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Research article

Nomograms of Iranian fetal middle cerebral artery Doppler waveforms and uniformity of their pattern with other populations' nomograms

Mohammad Kazem Tarzamni¹ , Nariman Nezami¹^,2^,3 , Narges Sobhani¹ , Nazanin Eshraghi¹ , Maryam Tarzamni⁴ and Yashar Talebi¹

¹Department of Radiology, Tabriz University of Medical Sciences, Tabriz, Iran

²Young Researchers Club, Tabriz Islamic Azad University, Tabriz, Iran

³Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran

⁴Obstetrics and Gynecology ward, 29 Bahman Hospital, Tabriz, Iran

author email corresponding author email

BMC Pregnancy and Childbirth 2008, 8:50doi:10.1186/1471-2393-8-50


Published:	12 November 2008

Abstract

Background

Doppler flow velocity waveform analysis of fetal vessels is one of the main methods for evaluating fetus health before labor. Doppler waves of middle cerebral artery (MCA) can predict most of the at risk fetuses in high risk pregnancies. In this study, we tried to obtain normal values and their nomograms during pregnancy for Doppler flow velocity indices of MCA in 20 – 40 weeks of normal pregnancies in Iranian population and compare their pattern with other countries' nomograms.

Methods

During present descriptive cross-sectional study, 1037 normal pregnant women with 20^th–40^thweek gestational age were underwent MCA Doppler study. All cases were studied by gray scale ultrasonography initially and Doppler of MCA afterward. Resistive Index (RI), Pulsative Index (PI), Systolic/Diastolic ratio (S/D ratio), and Peak Systolic Velocity (PSV) values of MCA were determined for all of the subjects.

Results

Results of present study showed that RI, PI, S/D ratio values of MCA decreased with parabolic pattern and PSV value increased with simple pattern, as gestational age progressed. These changes were statistically significant (P = 0.000 for all of indices) and more characteristic during late weeks of pregnancy.

Conclusion

Values of RI, PI and S/D ratio indices reduced toward the end of pregnancy, but PSV increased. Despite the trivial difference, nomograms of various Doppler indices in present study have similar pattern with other studies.