[Asynchronous Tele-Expertise (ASTE) in obstetrical ultrasound: Is it equivalent to face-to-face consultation?]

INTRODUCTION

The demand for remote advice has expanded since the advent of information and communication technology. This study aims to evaluate the use of asynchronous tele-expertise (ASTE) in providing a quality expert opinion in the field of obstetric ultrasound.

MATERIALS AND METHODS

Requests for expert opinions on pregnant patients were considered retrospectively over a 24-month period (01/09/2018 to 01/21/2020). All patients were initially seen in consultation with a midwife sonographer, located in Hyères, 82km from the expert's centre. In the event of unusual images, including one or more malformations on ultrasound screening, a second opinion was necessary. Responses were characterized as follows : possible or impossible to analyse images; ASTE alone or combined with a face-to-face consultation; and absence or presence of unusual images. Unusual images were classified as normal variants or recognised malformations. We analysed the outcomes of these pregnancies and assessed concordance between prenatal advice and postnatal outcome.

RESULTS

During the study period, we identified 174 referrals from 141 patients. Requests for advice were made by 3/174 (1.7%), 69/174 (39.7%), and 102/174 (58.6%) in the first, second, and third trimester of pregnancy, respectively. Overall, 115/141 (81.6%), 21/141 (14.9%), 4/141 (2.8%), and 1/141 (0.7%) patients were provided with one, two, three, and five opinions, respectively. In total, 37/141 (26.2%) patients required a face-to-face consultation, resulting in 38/174 (21.8%) opinions (one patient was seen twice). At least one unusual image was found for 27/141 (19.2%) patients and no unusual images were reported for 114/141 (80.8%) patients. Analysis of the pregnancy outcomes revealed a perfect correlation between prenatal advice and postnatal data, both for cases with unusual images and those without.

CONCLUSION

The preliminary results of our study reveal that ASTE is safe in terms of enabling an expert to answer a precise question formulated by a screener when confronted with images deemed to be unusual. Using this mode of communication, a tailored healthcare pathway may be defined for the mother and her foetus. This new type of practice cannot exist without establishing a genuine relationship of trust between the person requesting the opinion and the person who is asked to provide the opinion.

Basic heart examination: feasibility study of first-trimester systematic simplified fetal echocardiography

OBJECTIVE

First-trimester fetal cardiac screening examinations in low-risk populations should not have to meet the specifications required for high-risk populations. Our aim was to evaluate a simplified fetal echocardiographic ('basic heart') examination for early detection of severe congenital heart defects in a low-risk population.

METHODS

This was a first-trimester national 'flash study', performed over a 2-week period. Each observer was requested to perform simplified echocardiography without modifying the time and methods deemed necessary for the routine first-trimester ultrasound examination, in fetuses with crown-rump length between 45 and 84 mm. This basic heart assessment used targeted cross-sections of the four-chamber view (4CV) and of the three vessels and trachea (3VT) view, using color and/or directional power Doppler. All examinations were then reviewed offline and scored for quality by a qualified expert.

RESULTS

Sixty observers performed a total of 597 first-trimester ultrasound examinations, each performing an average of 10 (range, 1-26) procedures. Examinations were conducted transabdominally (79%; 472/597), transvaginally (3%; 17/597) or both (18%; 108/597). In 8% (45/597) of cases, the fetal back was anterior, in 18% (108/597) it was on the left side, in 63% (377/597) it was posterior and in 11% (67/597) it was on the right side. It became clear during scoring by the expert that, unlike the Herman quality score for nuchal translucency measurement, it was difficult to assess the quality of these images without taking into account normality of the heart itself. Analysis of scores showed that the 4CV was obtained successfully and was deemed normal in 86% (512/597) of the patients, in 7% (41/597) it was deemed technically infeasible and in 7% (44/597) it was deemed feasible but atypical, which may have been due to the presence of an abnormality or to poor quality of the image. The 3VT view was obtained successfully and was normal in 79% (472/597) of the patients, in 13% (78/597) it was technically infeasible and in 8% (47/597) it was deemed feasible but atypical. Both the 4CV and the 3VT view were obtained successfully and were normal in 73% (435/597) of patients.

CONCLUSION

It is possible for a trained operator to perform simplified fetal echocardiography during the routine first-trimester ultrasound examination in a low-risk population. In most cases, our basic heart examination can be used to reassure parents or identify potential problems to be clarified as early as possible in the second trimester. Copyright © 2016 ISUOG. Published by John Wiley & Sons Ltd.