The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians · 2016
Reference ranges of fetal adrenal gland and fetal zone volumes between 24 and 37 + 6 weeks of gestation by three-dimensional ultrasound.
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Helfer Talita Micheletti, Rolo Liliam Cristine, Okasaki Nayana Alves de Brito Melo, de Castro Maldonado Amarilis Aparecida, Rabachini Caetano Ana Carolina, Perez Zamarian Ana Cristina, Hamamoto Tatiana Emy Nishimoto Kawanami, Calsavara Vinicius Fernando, Moron Antonio Fernandes, Araujo Júnior Edward, Nardozza Luciano Marcondes Machado
Аннотация
OBJECTIVE: To establish reference ranges of the fetal adrenal gland (AG) and fetal zone (FZ) volumes using three-dimensional ultrasound (3DUS).
METHODS: We performed a prospective cross-sectional study with 204 normal singleton pregnancies between 24 and 37 + 6 weeks of gestation. The fetal AG and FZ volumes were obtained using the virtual organ computer-aided analysis method with a 30° rotation. To establish reference ranges as the function of gestational age (GA), quantile regression was performed with the adjusted coefficient of determination (R2). Intra- and inter-observer repeatability was performed using the intraclass correlation coefficient (ICC).
RESULTS: The mean results of fetal AG and FZ values were 0.42 cm3 (0.04-1.22) and 0.10 cm3 (0.02-0.47), respectively. The best-fit quantile regression models for fetal AG and FZ volumes as the function of GA were in first-degree models: AG = -0.937 + 0.041 × GA (R2 = 0.124) and FZ = -0.201 + 0.009 × GA (R2 = 0.127), respectively. We observed good intra-observer repeatability of fetal AG and FZ volumes, with an ICC of 0.996 and 0.989, respectively. We also observed good inter-observer repeatability, with an ICC of 0.972 and 0.966 for AG and FZ, respectively.
CONCLUSION: The reference ranges of AG and FZ volumes using 3DUS between 24 and 37 + 6 weeks of gestation were established and exhibited good repeatability.
METHODS: We performed a prospective cross-sectional study with 204 normal singleton pregnancies between 24 and 37 + 6 weeks of gestation. The fetal AG and FZ volumes were obtained using the virtual organ computer-aided analysis method with a 30° rotation. To establish reference ranges as the function of gestational age (GA), quantile regression was performed with the adjusted coefficient of determination (R2). Intra- and inter-observer repeatability was performed using the intraclass correlation coefficient (ICC).
RESULTS: The mean results of fetal AG and FZ values were 0.42 cm3 (0.04-1.22) and 0.10 cm3 (0.02-0.47), respectively. The best-fit quantile regression models for fetal AG and FZ volumes as the function of GA were in first-degree models: AG = -0.937 + 0.041 × GA (R2 = 0.124) and FZ = -0.201 + 0.009 × GA (R2 = 0.127), respectively. We observed good intra-observer repeatability of fetal AG and FZ volumes, with an ICC of 0.996 and 0.989, respectively. We also observed good inter-observer repeatability, with an ICC of 0.972 and 0.966 for AG and FZ, respectively.
CONCLUSION: The reference ranges of AG and FZ volumes using 3DUS between 24 and 37 + 6 weeks of gestation were established and exhibited good repeatability.