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Distal lateral ventricular atrium: reevaluation of normal range
R Alagappan1, P D Browning, A Laorr
1Department of Radiology, University of California Davis Medical Center, Sacramento 95817.
Radiology
|November 1, 1994
Summary
The upper limit for fetal lateral ventricular atrium size is 10.1 mm. Measurements of 10 mm or more warrant further investigation for fetal abnormalities.
Area of Science:
- Prenatal diagnosis
- Fetal neuroimaging
- Medical ultrasonography
Background:
- Accurate fetal biometry is crucial for assessing neurodevelopment.
- The lateral cerebral ventricular atrium size is a key indicator in fetal neurosonography.
Purpose of the Study:
- To re-evaluate the mean size of the fetal lateral cerebral ventricular atrium.
- To establish updated normative values for fetal ventricular atrium measurements.
Main Methods:
- Axial ultrasound images of 500 fetuses were analyzed using standard criteria.
- Follow-up included postnatal ultrasound and clinical examinations for fetuses with atrial measurements ≥10 mm.
Main Results:
- The mean ventricular atrium size was 6.6 mm (SD 1.4 mm).
- The calculated upper normal limit (mean + 2.5 SD) was 10.1 mm.
- Postnatal evaluations for 11 fetuses with isolated ventriculomegaly (≤13 mm) were normal.
Conclusions:
- The upper limit of normal for fetal lateral ventricular atrium measurement should remain 10 mm (mean + 2.5 SD).
- Measurements ≥10 mm necessitate a thorough search for fetal anomalies and consideration of amniocentesis.