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Mathematical modeling of fetal organ growth using the Rossavik growth model: IV. Lung
1Department of Obstetrics and Gynecology, Shimane Medical University, Izumo, Japan.
Insights
This study established standard fetal lung growth curves using ultrasound measurements in 116 Japanese fetuses. These curves aid in identifying fetal lung development abnormalities, such as pulmonary hypoplasia, in utero.
Area of Science:
- Fetal Medicine
- Medical Imaging
- Biometry
Background:
- Accurate fetal lung growth assessment is crucial for prenatal care.
- Existing methods for evaluating fetal lung development have limitations.
Purpose of the Study:
- To establish standard growth curves for fetal lung, heart, and chest areas.
- To develop a reliable method for identifying pulmonary hypoplasia in utero.
Main Methods:
- Ultrasound measurements of left lung area (LLA), right lung area (RLA), and total lung area (TLA) were taken from 14 to 41 weeks menstrual age in 116 normal Japanese fetuses.
- Heart area (HA) and chest area (CA) were also monitored.
- The Rossavik growth model was employed to determine growth curves, with high R2 values (95.3% for CA, 92.1% for TLA).
- Variability analysis was performed to account for increasing variability with fetal age.
Main Results:
- High R2 values indicate the reliability of the Rossavik growth model for fetal measurements.
- Variability analysis revealed a progressive increase in measurement variability with advancing fetal age.
- Standard curves for fetal lung, heart, and chest dimensions were successfully determined.
Conclusions:
- The derived standard curves offer a superior method for evaluating normal fetal lung growth.
- These curves are valuable tools for the in utero identification of pulmonary hypoplasia.
- This research provides enhanced capabilities for prenatal diagnosis and management of fetal lung conditions.
Abstract:
Growth of the fetal lung has been monitored by left lung area (LLA), right lung area (RLA), and total lung area (TLA) from 14 to 41 weeks menstrual age in 116 normal Japanese fetuses. Growth of the fetal heart and chest has also been monitored by heart area (HA) and chest area (CA), respectively. Growth curves for these parameters have been determined by using a Rossavik growth model [p = c(t)k+s(t)]. R2 values of 95.3%, 90.3%, 89.0%, 88.7%, and 92.1% were obtained for CA, HA, LLA, RLA, and TLA, respectively. Variability analysis indicated a progressive increase in variability with fetal age for these five parameters. Variability data were used with the growth curve models to determine standard curves for these parameters. These standard curves provide a superior means for evaluating the normal fetal lung growth in the fetus and for identifying pulmonary hypoplasia in utero.