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- W2896536081 abstract "It has been suggested that when fetal femur is insonated by the anterior approach of the fetal thigh the diaphysis appears rectilinear on the sonographic image, while lateral approach provides concave shape of the diaphysis. When the femur is approached laterally, the rounded upper-lateral extremity is probably not totally exposed to the ultrasound beam, which contributes to an underestimation of the real femur length. The objective of the study was to confirm that insonation approach, assessed by the shape of the fetal femur diaphysis on the sonographic plane (straight line or concave) impacts on the measured length. Retrospective analysis of sonographic images of fetal femur length measurement in consecutive examinations of women attending our centre for a routine ultrasound scan at 21–24 and 30–34 weeks between June 2017 and February 2018 was performed. Gestational age was calculated based on first trimester Crown–rump length (CRL) measurement. Only women with no relevant medical and obstetrical history were included in the study. All images were divided into 2 groups: those were diaphysis appeared straight-line (group 1) and those with concave shape of diaphysis (group 2). All measurements were expressed in z-score for gestational age. z-score values in the two groups were compared by using a T-student test. A total of 1138 ultrasound scans were included in the analysis, with 581 and 557 cases classified respectively in the two groups. Femur measurement values were significantly lower in the 2nd group, the mean +/- SD z-score were 0.56 +/- 0,95 and 0.45+/-0.90 in group 1 and 2 respectively, p=0.05. The results of the study confirm the existence of a statistically significant difference between the two insonation approaches of the fetal femur measurement. The lateral approach may lead to a systematic error and underestimation of the femur length. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article." @default.
- W2896536081 created "2018-10-26" @default.
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- W2896536081 date "2018-10-01" @default.
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- W2896536081 title "OP14.11: Comparison of two different sonographic approaches of the fetal femur length measurement" @default.
- W2896536081 doi "https://doi.org/10.1002/uog.19523" @default.
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