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J Ultrasound Med ; 41(8): 2005-2010, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34792823

RESUMO

OBJECTIVES: The sacral ratio (SR) was described as a postnatal X-ray-based method to detect sacral abnormalities and predict functional prognosis for fecal continence in children with anorectal malformations (ARMs). The present study aimed to describe a novel method of assessing sonographic fetal sacral ratio (f-SR) in a normal population of fetuses. METHODS: Sixty three-dimensional (3D) ultrasound reconstruction images of the sacrum obtained from routine low-risk scans performed between 21 and 26 weeks of gestation served for measurement. The f-SR was calculated in a coronal view as the ratio between lines drawn at the upper and lower levels of the iliac bone and the 5th sacral vertebra. Bland-Altman plots assessed the inter- and intrareader variabilities of measurements. RESULTS: The f-SR in the normal population of fetuses was 0.913 (±0.094). During the study period, three cases with ARM were examined and had a mean f-SR of 0.55. There was good repeatability of measurements and between readers' agreement. CONCLUSIONS: The present study introduces a novel prenatal sonographic f-SR that can be reliably calculated on prenatal 3D ultrasound with good reliability and reproducibility. Future research will identify the clinical significance of f-SR abnormalities in ARM and their long-term impact on continence.


Assuntos
Malformações Anorretais , Doenças da Coluna Vertebral , Criança , Feminino , Feto , Humanos , Gravidez , Reprodutibilidade dos Testes , Sacro/anormalidades , Sacro/diagnóstico por imagem , Ultrassonografia Pré-Natal/métodos
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