A pictorial guide for the second trimester ultrasound

Bethune, Michael; Alibrahim, Ekaterina; Davies, Braidy; Yong, Eric

doi:10.1002/j.2205-0140.2013.tb00106.x

Cited by 39 publications

(39 citation statements)

References 49 publications

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“…The systematic review by Ruiter et al demonstrated 83% of vasa praevia cases had one or more clinical risk factors, highlighting that occasionally, a vasa praevia case will have no detectable risk factors. Screening every woman in the mid‐trimester ultrasound transabdominally over the lower uterine segment with colour Doppler should improve the detection in these cases (Figures and ) …”

Section: Discussionmentioning

confidence: 99%

“…Surveyed participants definition of vasa praevia should improve the detection in these cases (Figures 6 and 7). 2,10 The prevalence of velamentous cord insertion is the most common cause of vasa praevia and occurs in 1:100 singleton pregnancies. 7,[11][12][13] The number of women with a velamentous cord insertion that will have a vasa praevia has been reported high as 1 in every 13.…”

Section: Figurementioning

confidence: 99%

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Detection of vasa praevia in the mid‐trimester ultrasound by Australian sonographers

et al. 2019

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Objective To ascertain Australian obstetric sonographers knowledge and current practice when assessing for vasa praevia in the mid‐trimester ultrasound with the view to improve prenatal diagnosis. Methods Between August and September 2018, a survey was emailed to 4868 Australian sonographers registered to participate in Australian Sonography Association Registry (ASAR) facilitated research projects. A total of 577 responses were received. The sonographers survey response was compared with published Royal Australian and New Zealand College of Obstetricians and Gynaecologists (RANZCOG) recommendations. Results There appears to be an unfamiliarity with the RANZCOG recommendations, in particular that vasa praevia is defined as a fetal vessel lying within 20 mm of the cervical internal os (IOS). Transabdominally, if a vasa praevia risk factor is identified (including a fetal vessel observed in the lower uterine segment), less than 48% of surveyed sonographers proceed to a targeted transvaginal scan. Conclusion To enable effective diagnosis of vasa praevia, it is important to recognise associated risk factors that can raise suspicion for a potential vasa praevia; these are velamentous cord insertion, succenturiate lobe, and low‐lying placenta. A lower threshold of performing a transvaginal ultrasound when risk factors are identified (including a fetal vessel is identified in the lower uterine segment) may significantly improve vasa praevia diagnosis in the mid‐trimester ultrasound.

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Section: Discussionmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Detection of vasa praevia in the mid‐trimester ultrasound by Australian sonographers

et al. 2019

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“…A dynamic sweep of the transducer with colour Doppler over the lower uterine segment (to the lateral uterine walls) should be performed and documented at every mid trimester ultrasound 2,3,6 A visible risk factor, poor visualisation or potential fetal vessel in the lower uterine segment should prompt a transvaginal ultrasound as it has a higher specificity and improved accuracy than transabdominal approach 2,3,7 The location of the placental cord insertion should be identified at every mid trimester ultrasound with 2D imaging and colour Doppler 3 .…”

Section: Recommendationsmentioning

confidence: 99%

“…If a velamentous cord insertion is detected further investigation with transvaginal ultrasound of the lower uterine segment to exclude vasa praevia is recommended 2‐4 Universal screening of the placenta architecture is recommended at every mid trimester ultrasound 7 . If a succenturiate lobe placenta is identified, documentation of communicating vessels between the two placental components is advised.…”

Section: Recommendationsmentioning

confidence: 99%

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Vasa praevia diagnosis in the mid trimester ultrasound

2020

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Improving precision of second‐trimester biometry

Loiacono

Bethune

Schneider

et al. 2018

Australas J Ultrason Med

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Objective: To utilise image score-based criteria for second-trimester fetal biometry as an educational tool to improve biometry quality. Methods: Five sonographers regularly performing obstetric ultrasound examinations were recruited for this study. Biometry images were collected from fifteen second-trimester examinations for each sonographer prior to participating in a biometry education session, and another set of biometry images were collected from fifteen second-trimester examinations following the education session. The education session was a one-hour presentation that explained image score-based criteria to evaluate and grade the quality of the bi-parietal diameter (BPD), head circumference (HC), abdominal circumference (AC), femur length (FL) and humeral length (HL) biometry parameters. Each of the five sonographers performed a total of 30 examinations (15 pre-and 15 post-education session). From these examinations, a total of 150 images were collected for each biometry parameter (75 pre-and 75 post-education). A total of 600 biometry images were evaluated. Images from both the pre-and post-education session were assessed by an obstetrician sonologist using the same image score-based criteria. Pre-and post-image scores were compared using paired t-tests. Results: Improvement in the mean image scores for all biometry parameters was observed after the education session. The difference between pre-and post-education image quality scores was significant for the AC (P = 0.01), FL (P = 0.002) and for the overall score (P = 0.001). Conclusion: Implementing an image score-based criteria evaluation technique is a simple and useful method to improve fetal biometry precision.

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A pictorial guide for the second trimester ultrasound

Cited by 39 publications

References 49 publications

Detection of vasa praevia in the mid‐trimester ultrasound by Australian sonographers

Detection of vasa praevia in the mid‐trimester ultrasound by Australian sonographers

Vasa praevia diagnosis in the mid trimester ultrasound

Improving precision of second‐trimester biometry

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