Accuracy and Reproducibility of Ultrasound Measurements in Obstetric Management

Nakai, Asami; Oya, Atsuko

doi:10.1159/000064694

Cited by 21 publications

(16 citation statements)

References 26 publications

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“…Intraobserver and interobserver variability of sonographic measurements varies widely, according to the sonographic measurement studied. Reliability measurements for the AFV show only moderate interobserver and intraobserver correlations, 7,8 whereas fetal biometric measurements are highly reproducible. 7,9,10 Reliability measurements of the fetal circulation vary by report and vessel studied.…”

Section: Discussionmentioning

confidence: 93%

Reliability of Fetal Middle Cerebral Artery Velocity Measurements

Clark

LaCoursiere

Byrne

et al. 2009

J of Ultrasound Medicine

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Section: Discussionmentioning

confidence: 93%

Reliability of Fetal Middle Cerebral Artery Velocity Measurements

Clark

LaCoursiere

Byrne

et al. 2009

J of Ultrasound Medicine

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“…In the light of these publications. it can be said that coloured Doppler application is widely used in the evaluation of fetal well-being while it has also become important in reducing the perinatal mortality and morbidity rates especially in high-risk pregnancies (12)(13)(14)(15). Coloured Doppler application is able to provide information about the early diagnosis of fetal distress quicker than other tests and this is its main advantage (12).…”

Section: Methodsmentioning

confidence: 99%

The relationship between doppler parameters and perinatal outcomes in postterm pregnancies.

2014

J Turgut Ozal Med Cent

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Aim: The aim of the study is to identify the relationship between doppler parameters and perinatal outcomes in post-term pregnancies. Material and Method: 101 pregnant women (37-41 weeks, control group; n:51 and ≥41 weeks, study group, n:50) were included in the study. We performed umblical artery and middle cerebral artery blood flow velocity waveform (pulsatility index, resistivity index, and systole/diastole ratio) analyses for our patients. Results: The mean value of the umbilical artery resistivity index was significantly higher in the study group than the control group while the mean value of the umbilical artery pulsatility index was significantly lower in the study group. The middle cerebral artery resistivity index was significantly lower in the study group, which was consistent with preferantial perfusion of the brain. We also found decreased ratios of middle cerebral artery resistivity index in umblical artery resistivity index in the study group (1.11) compared with the control group (1.25). These findings can be interpreted in favor of worse perinatal outcomes in the study group while the increased adverse perinatal outcome rates (%64) in the study group supports this view. The ratio of middle cerebral artery resistivity index to umblical artery resistivity index <1.155 can be used as a sign of adverse perinatal outcomes in prolonged pregnancies with a senstivity of %76.6 and a specificity rate of %85.2. Conclusion: Doppler ultrasonography can be used for reducing perinatal mortality and morbidity of prolonged pregnancies. Key Words: Doppler; Postterm Pregnancy; Perinatal Mortality; Perinatal Morbidity. Uzamış Gebeliklerde Doppler Ultrasonografi Bulguları ile Perinatal Sonuçlar Arasındaki İlişkiÖzet Amaç: Uzamış gebeliklerde doppler ultrasonografi bulguları ile perinatal sonuçlar arasındaki ilişkiyi incelemek amaçlandı. Gereç ve Yöntem: Bu çalışmaya 37-41 gebelik haftası arasındaki 51 (kontrol grubu), ≥41 gebelik haftasındaki 50 hasta (çalışma grubu) dahil edildi. Renkli doppler ultrasonografide umblikal arter ve orta serebral artere ait akım paternleri değerlendirilerek doppler indeksleri ölçüldü. Bu damarlarda akımı değerlendirmek için, pulsatilite indeksi, rezistivite indeksi ve sistol/diastol oranı ölçüldü. Bulgular: Uzamış gebeliklerde, kontrol grubuna göre, umblikal arter rezistivite indeks değeri daha yüksek, pulsatilite indeks değeri daha düşük bulundu. Uzamış gebeliklerde ölçülen orta serebral arter rezistivite indeks ortanca değeri kontrol grubuna göre anlamlı derecede daha düşüktü ve bu, beyin için oluşturulan koruma mekanizması lehine bir bulgu olarak değerlendirildi. Orta serebral arter rezistivite indeks / umblikal arter rezistivite indeks ortanca değeri çalışma grubunda (1.11) kontrol grubununkine (1.25) göre istatistiksel olarak daha küçüktü, nitekim uzamış gebelikler için kötü perinatal sonuç %64 sıklıkla kontrol grubuna göre istatistiksel olarak anlamlı derecede daha fazla bulundu. Uzamış gebeliklerde kötü perinatal sonucu öngörmede orta serebral arter rezistivite indeks / ...

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“…This trend is known to be more pronounced for HC and AC than for FL [18]. However, studies have also shown good intraand inter observer reproducibility of ultrasound measurements of fetal biometry [25][26][27]. In the INTERGROWTH21st study centiles were derived from serial (longitudinal) measurements from each fetus [19].…”

Section: Papermentioning

confidence: 99%

Comparison of ultrasound fetal biometry of singleton fetuses with a reference chart in pregnant women with normal nutritional and health status

Dias

Chandrasiri

Abeykoon³

et al. 2017

Ceylon Med. J.

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Objectives The aim of this study was to compare fetal biometry of singleton fetuses in pregnant women with normal nutritional and health status in the Ampara district, with a commonly used reference chart.Methods A cross sectional study was carried out in the Ampara District. Women with normal nutritional and health status and minimal environmental constraints on fetal growth (n=714) were enrolled during the first trimester and gestational age was confirmed by fetal crown-rump length measurement between 11 weeks + 0 days and 13 weeks + 6 days. For this study, each mother was considered only once for measurement of fetal biometry, at gestations between 11 and 41 weeks. Fetal bi-parietal diameter (BPD), head circumference (HC), abdominal circumference (AC) and femur length (FL) were measured using standard techniques, and separate regression models were fitted to estimate the means and standard deviations and derive gestation specific centiles for each parameter, assuming that the measurements have a normal distribution at each gestational age. The fetal biometry results obtained from the current study were compared with a commonly used reference chart. ResultsThe fitted 10th, 50th and 90th centiles at 40 weeks of gestation were, 87.9 mm, 93.2 mm and 98.5 mm for BPD, 313.8 mm, 328.9 mm and 344.0 mm for HC; 298.2 mm, 322.5 mm and 346.9 mm for AC and 69.7 mm, 75.0 mm and 80.2 mm for FL. When compared with the reference chart, significant differences of fetal biometry were seen in the third trimester but not in the second trimester.Conclusions Ultrasound fetal biometry of singleton fetuses in pregnant women with normal nutritional and health status in the Ampara District were significantly different in the third trimester, from a routinely used reference chart.Comparison of ultrasound fetal biometry of singleton fetuses with a reference chart in pregnant women with normal nutritional and health status

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Accuracy and Reproducibility of Ultrasound Measurements in Obstetric Management

Cited by 21 publications

References 26 publications

Reliability of Fetal Middle Cerebral Artery Velocity Measurements

Reliability of Fetal Middle Cerebral Artery Velocity Measurements

The relationship between doppler parameters and perinatal outcomes in postterm pregnancies.

Comparison of ultrasound fetal biometry of singleton fetuses with a reference chart in pregnant women with normal nutritional and health status

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