Related Experiment Video
Updated: Sep 26, 2026
Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
Published on: June 29, 2013
Correlation between biomagnetic and Doppler findings of umbilical artery in fetal growth restriction
A Kotini1, K Avgidou, N Koutlaki
1Laboratory of Medical Physics, Department of Obstetrics and Gynaecology, Democritus University of Thrace, Alexandroupolis, Greece. akotin@axd.forthnet.gr
Insights
Biomagnetic recordings of the umbilical artery show promise in predicting fetal well-being, especially in intrauterine growth restriction (IUGR) pregnancies. This method may offer a valuable alternative to Doppler ultrasound screening for assessing uteroplacental blood flow complications.
Area of Science:
- Biophysics
- Maternal-Fetal Medicine
- Medical Imaging
Background:
- Intrauterine growth restriction (IUGR) and preeclampsia can impair uteroplacental blood flow, posing risks to fetal well-being.
- Doppler ultrasound screening is a standard method for assessing fetal circulation, but novel techniques are being explored.
- Biomagnetic recordings offer a non-invasive approach to evaluating physiological processes.
Purpose of the Study:
- To evaluate the efficacy of umbilical artery biomagnetic recordings in predicting complications associated with impaired uteroplacental blood flow in fetuses with IUGR.
- To compare the predictive value of biomagnetic recordings against Doppler ultrasound screening.
Main Methods:
- The study included 11 fetuses with IUGR and preeclampsia and 19 normal pregnancies, all between 34-37 weeks gestation.
- Umbilical artery Doppler ultrasound measurements were assessed using pulsatility index (PI).
- Biomagnetic signals from the umbilical artery were recorded and analyzed for magnetic power spectral amplitudes.
Main Results:
- Biomagnetic spectral amplitudes were significantly lower in IUGR pregnancies (117+/-24 fT/radical Hz) compared to normal pregnancies (224+/-37 fT/radical Hz).
- Statistically significant differences were observed between normal and IUGR groups for spectral amplitudes, Doppler PI, fetal pH, and Apgar scores (p < 0.0001).
- Multiple linear regression indicated that PI, pH, and Apgar scores influenced biomagnetic values (ANOVA: p < 0.0005).
Conclusions:
- Biomagnetic recordings of umbilical artery blood flow show potential as a valuable tool for assessing fetal well-being.
- This technique may be particularly useful in managing pregnancies complicated by preeclampsia and IUGR.
- Biomagnetism could complement or enhance existing screening methods for high-risk pregnancies.
Objective:
To assess the value of biomagnetic recordings of the umbilical artery over Doppler ultrasound screening in order to predict complications of impaired uteroplacental blood flow in fetuses with intrauterine growth restriction (IUGR).
Methods:
Our study population included 11 IUGR preeclamptic (34-37-weeks gestation; birth weight 1969 +/- 129 g) and 19 normal pregnancies (34-37-weeks gestation; birth weight 3195 +/- 229 g). Umbilical artery Doppler ultrasound waveform measurements were expressed in terms of pulsatility index (PI). Biomagnetic signals (waveforms) recorded from the IUGR umbilical artery were expressed in terms of magnetic power spectral amplitudes.
Results:
In all cases, the frequency band considered was 2 to 7 Hz. The spectral amplitudes were low (mean: 117+/-24 fT/ radical Hz) in most (90.9%) IUGR pregnancies and high (mean: 224+/-37 fT/ radical Hz) in most normal pregnancies (89.5%). There was a statistically significant difference between normal and IUGR pregnancies with respect to spectral amplitudes (p < 0.0001), Doppler PI (p < 0.0005), pH (p < 0.0005) and Apgar score (p < 0.0005). Multiple linear regression analysis revealed an influence of PI, pH and Apgar scores on the biomagnetic values (ANOVA: p < 0.0005).
Conclusion:
Our data imply that biomagnetic values of the umbilical artery flow could prove to be a helpful method for the evaluation of fetal well being especially in pregnancies complicated with preeclampsia and growth restriction.
