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Intrauterine growth restriction
1Department of Obstetrics and Gynecology, University Hospital Lund, Lund University, Lund, Sweden. karel.marsal@gyn.lu.se
Insights
Early diagnosis of intrauterine growth restriction (IUGR) is crucial for fetal surveillance. Advanced ultrasound and Doppler velocimetry improve precision in evaluating growth-restricted fetuses, reducing complications.
Area of Science:
- Perinatology and Fetal Medicine
- Medical Imaging and Diagnostics
- Fetal Physiology
Background:
- Intrauterine growth restriction (IUGR) pathophysiology is complex and poorly understood.
- Growth-restricted fetuses face hypoxia risks, necessitating early diagnosis and surveillance.
- Accurate fetal assessment is vital for timely intervention and improved perinatal outcomes.
Purpose of the Study:
- To explore advanced diagnostic methods for intrauterine growth restriction (IUGR).
- To enhance individualized evaluation and management of growth-restricted fetuses.
- To present new data on Doppler changes in preterm IUGR for clinical protocol development.
Main Methods:
- Utilized three-dimensional ultrasound for precise fetal weight estimation.
- Applied conditional standard deviation scores for individualized fetal growth evaluation.
- Incorporated umbilical artery Doppler velocimetry and fetal heart rate variability for surveillance.
Main Results:
- Three-dimensional ultrasound offers improved precision in fetal weight estimation.
- Umbilical artery Doppler velocimetry after 32 weeks reduces perinatal mortality and interventions.
- Early evaluation (before 32 weeks) requires comprehensive Doppler assessment of placental and fetal vessels.
Conclusions:
- Advanced ultrasound and Doppler techniques enhance the diagnosis and management of IUGR.
- Individualized evaluation using Doppler velocimetry is key for growth-restricted fetuses.
- New data on Doppler changes in preterm IUGR will inform clinical management protocols.
Abstract:
Pathophysiological processes underlying intrauterine growth restriction are very complex and poorly understood. Growth restricted fetuses are at risk of hypoxia and, therefore, an early diagnosis of intrauterine growth restriction is important for initiation of fetal surveillance. Application of a three-dimensional ultrasound method for estimation of fetal weight promises better precision. Use of conditional standard deviation scores of fetal biometric variables has been suggested for improved individualized evaluation of intrauterine growth. Application of umbilical artery Doppler velocimetry in the clinical management of growth-restricted fetuses after 32 weeks of gestation leads to decreased perinatal mortality and lower rates of obstetric interventions. Evaluation of fetal state before 32 weeks is difficult and should include Doppler examination of placental circulation and several fetal arterial and venous vessel beds. In addition, recordings of short-term variability of fetal heart rate and biophysical profile have been suggested for fetal surveillance. Important new data on the time sequence of Doppler changes in various vessels of compromised very preterm growth restricted fetuses have been presented, which will enable the establishment of clinical management protocols for evaluation in prospective randomized studies.