Document Type : Original Research Article
Authors
- Mahboobeh Shirazi 1
- Fatemeh Rahimi Sharbaf 2
- Fatemeh Golshahi 2
- Behrokh Sahebdel 2
- Elham Feizabad 3
- Leila Asadi 4
- Afsaneh Alimadad-Tafreshi 5
- Arash Jafariyeh 6
- Akram Valizadeh 7
- tayebeh sedighi 8
- Fatemeh Takaloo 5
- Aazam Taghavi-Zahedkalaei 9
1 Maternal, Fetal and Neonatal Research Center, Yas Complex Hospital, Tehran University of Medical Sciences, Tehran, Iran
2 Maternal, Fetal and Neonatal Research Centre, Tehran University of Medical Sciences, Tehran, Iran
3 Department of Obstetrics and Gynecology, Yas Hospital, Tehran University of Medical Sciences, Tehran, Iran.
4 School of Nursing and Midwifery, Tehran University of Medical Sciences, Tehran, Iran
5 Department of Perinatology, Yas Complex Hospital, Tehran University of Medical Sciences, Tehran, Iran
6 Department of Anesthesiology, School of Medicine, Amir Alam Hospital, Tehran University of Medical Sciences, Tehran, Iran
7 1Department of Perinatology, Yas Complex Hospital, Tehran University of Medical Sciences, Tehran, Iran
8 Assistant professor of obstetric and gynecology school of medicine ayatollah kashani hospital jiroft university of medical sciences
9 Department of Perinatology, Tehran University of Medical Sciences, Tehran, Iran
Abstract
Background & Objective: Clinical use of uterine artery (UtA) Doppler ultrasound imaging requires reference values but despite the common use of UtA Doppler examination during pregnancy, to the best of our knowledge, there is no such range for Iranian pregnant women. Hence, this study aimed to investigate uterine artery Doppler indices in Iranian normal pregnancies and compare these with the other country values.
Materials & Methods: This observational longitudinal study was conducted on 486 low-risk pregnant women. The amount of plausibility index (PI) and resistance index (RI) as well as the presence of diastolic notch were assessed in weeks 11 to 14, 17 to 24, and 27 to 32 through Doppler ultrasound.
Results: The bilateral notch for the gestational age of 11 to 14 weeks was detected at about 6%, for the gestational age of 17 to 24 weeks it was about 4.2% and for the gestational age of 27 to 32 weeks it was about 3.6%. Reference intervals for mean uterine artery PI according to gestational ages, show a significant (p<0.001) difference between different percentages. Also, there is a significant relation between the mean uterine arteries PI/RI and the presence or absence of pregnancy complications (IUGR, premature birth, IUFD) among the participants.
Conclusion: The results of this research showed that there is a significant relation between PI and pregnancy complications, while this was not detected in RI and diastolic notch. These results are relatively consistent with the findings of researchers in other countries.
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