Lóbulo hepático derecho fetal: nomograma por percentiles

Objective: To design a nomogram by percentiles of the fetal right liver lobe measurement in pregnant between 16 and 40 weeks of gestation who attend the Maternidad Concepción Palacios in the period between March and August 2020. Methods: A prospective, descriptive and cross-sectional study was conducted that included 350 patients with informed consent, were measured fetal right liver lobe, related to gestational age, based on the date of the last menstruation or ultrasound of the first trimester, and associated with weight, size and maternal body mass index. Results: An average fetal right liver lobe measurement of 37.42 ± 12.03 mm (Min 13 and max 62 mm) was obtained. The regression analysis yielded a correlation coefficient between fetal right liver lobe size and gestational age of 0.950. The determination coefficient obtained was 0.903. Depending on the result of the variance analysis, there is an association between the two variables (p-0.000). A fetal right liver lobe increase measurement of + 1,585 per week (95% CI - 1,531 - 1,640) (p-0.000) was obtained. The percentile nomogram was constructed. There was no relationship between the measurement and maternal weight and height, but there was with the body mass index. Conclusion: The fetal right liver lobe, as an expression of the liver measure, grows relative to the increase in gestational age and this allowed to design a nomogram per percentiles.