Related Experiment Videos
Intraobserver and interobserver reproducibility of fetal biometry.
S C Perni1, F A Chervenak, R B Kalish
1Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Weill Medical College of Cornell University, New York, NY 10021, USA. scperni@yahoo.com
Summary
Ultrasound measurements for fetal biometry, including biparietal diameter, abdominal circumference, head circumference, and femur length, demonstrate high intra- and interobserver reproducibility. These findings confirm the reliability of fetal ultrasound measurements in clinical practice.
Area of Science:
- Medical Imaging
- Obstetrics and Gynecology
- Fetal Medicine
Background:
- Accurate fetal biometry is crucial for monitoring pregnancy progression and detecting potential abnormalities.
- Ultrasound is the primary imaging modality for assessing fetal growth and development.
- Ensuring the reliability of ultrasound measurements is essential for consistent clinical decision-making.
Purpose of the Study:
- To evaluate the intraobserver and interobserver reproducibility of key fetal biometric measurements using ultrasound.
- To determine the reliability of measurements for fetal biparietal diameter (BPD), abdominal circumference (AC), head circumference (HC), and femur length (FL).
Main Methods:
- 122 singleton pregnancies were assessed for intra- and interobserver agreement.
- Sonographers performed repeated measurements of BPD, AC, HC, and FL to assess intraobserver reliability.
- A second blinded sonographer measured the same parameters to evaluate interobserver reliability.
- Intraclass correlation coefficients (intra-CC, inter-CC), reliability coefficients (RC), and Bland-Altman plots were used for statistical analysis.
Main Results:
- High intra- and interobserver reproducibility was observed for all four fetal biometric parameters (BPD, AC, HC, FL).
- Intraclass correlation coefficients (intra-CC and inter-CC) and reliability coefficients (RC) were consistently above the threshold for reliable consensus (>0.75).
- Bland-Altman plots confirmed a high degree of repeatability for all measured fetal biometric parameters.
Conclusions:
- Ultrasound measurements of fetal biometry demonstrate excellent intra- and interobserver reproducibility.
- The study confirms the high reliability of fetal ultrasound measurements for BPD, AC, HC, and FL.
- These findings support the consistent and dependable use of ultrasound in routine fetal assessments.