Search

There are no large validation trials comparing teleultrasound to on‐site ultrasound. We aim to compare the sensitivity and accuracy of teleultrasound and demonstrate that teleultrasound is not inferior to on‐site ultrasound in the pre‐natal diagnosis of fetal anomalies. All targeted ultrasounds performed between November 2010 and December 2012 were considered. We excluded studies performed at less than 17 weeks' gestation, on multiple gestations and for reasons other than an anatomical survey. Post‐natal diagnoses were obtained from a state level mandatory birth defects surveillance programme. Descriptive statistics (sensitivity, specificity, positive and negative predictive values and accuracy) were calculated for both groups. A test of non‐inferiority was performed, with the non‐inferiority difference set at 0.15. The teleultrasound and on‐site ultrasound groups consisted of 2368 and 3145 studies, respectively. The sensitivity of teleultrasound and on‐site ultrasound was 57.46% and 76.57%, and the accuracy was 95.9% and 90.97%, respectively. The observed sensitivity difference was −0.1911. The accuracy, specificity, positive and negative predictive values of teleultrasound are similar to on‐site ultrasound. Teleultrasound is inferior to on‐site ultrasound in the detection of fetal anomalies; however, it has improved accuracy, as well as higher negative and positive predictive values. A negative teleultrasound is more likely to identify a non‐anomalous fetus, and a positive teleultrasound is more likely to correctly identify an anomalous fetus. Teleultrasound has an important role in pre‐natal diagnosis for those patients unable or unwilling to travel for an on‐site ultrasound.

Ultrasound serves an important role in the prenatal diagnosis of fetal structural anomalies. Recently, there has been increased use of teleultrasound protocols. We aimed to evaluate the sensitivity and accuracy of teleultrasound. We conducted an Institutional Review Board–approved retrospective cohort study determining the sensitivity and accuracy of teleultrasound. In addition, we evaluated the number of ultrasound examinations required to complete an anatomic survey. Only ultrasound examinations performed for anatomic surveys were included. Studies were excluded if performed before 16 completed weeks' gestation, if they had multiple gestations, or for reasons other than anatomy (eg, Doppler studies and fluid assessment). Prenatal diagnoses were compared with postnatal diagnoses obtained from a robust mandatory birth defects surveillance program that records all birth defects in the entire state, from deliveries before 20 weeks' gestation through infants up to 2 years of age. A total of 2499 studies were evaluated; 2368 were included. The teleultrasound cohort had a congenital anomaly prevalence of 5.66%. The sensitivity of teleultrasound was 57.46%; the specificity was 98.21%; and the accuracy was 95.9%. Anatomic surveys were completed after 1 visit in 82% of patients, whereas 63% and 61% of the remaining patients required 2 and 3 visits, respectively. Teleultrasound for prenatal diagnosis has similar sensitivity and accuracy as the published literature for on‐site ultrasound. Further studies are needed to compare the sensitivity and accuracy within the same population and further validate this potentially cost‐saving modality.