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Doppler waveforms: the relation between ductus venosus and inferior vena cava
1Obstetrics and Gynecology Hospital of FuDan University, Shanghai, China. zhangbinyuan@yahoo.com.cn
Ultrasound in Medicine & Biology
|September 24, 2005
Summary
This study found a weak correlation between the ductus venosus resistance index (DV-RI) and inferior vena cava preload index (IVC-PLI) in healthy pregnancies. No significant correlation was found within specific gestational age groups.
Area of Science:
- Fetal Medicine
- Cardiovascular Physiology
- Diagnostic Ultrasound
Background:
- The ductus venosus (DV) and inferior vena cava (IVC) are critical fetal circulatory structures.
- Understanding their hemodynamic interplay is essential for assessing fetal well-being.
Purpose of the Study:
- To investigate the correlation between Doppler velocity waveforms of the DV and IVC.
- To analyze the relationship between the DV resistance index (DV-RI) and IVC preload index (IVC-PLI) across different gestational ages.
Main Methods:
- 142 healthy pregnant women were categorized into three gestational age groups.
- Doppler velocity waveforms of the DV and IVC were measured using Acuson 128xp.
- Analysis focused on DV-RI and IVC-PLI.
Main Results:
- Both DV-RI and IVC-PLI showed significant correlation with advancing gestational weeks (r = -0.247 and r = -0.540, respectively).
- A weak overall correlation was observed between DV-RI and IVC-PLI (r = 0.202, p < 0.05).
- No significant correlation between DV-RI and IVC-PLI was found within any of the three gestational age groups.
Conclusions:
- This study provides novel insights into the correlation between DV-RI and IVC-PLI.
- The findings suggest distinct roles for the DV and IVC in fetal hemodynamics.
- Further research may elucidate the clinical significance of these indices in specific fetal conditions.