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Objective The objective of this study was to test the association between fetal intravenous anesthesia and the change in middle cerebral artery peak systolic velocity (MCA-PSV) in patients undergoing intrauterine transfusion (IUT) for suspected fetal anemia. Study Design We retrospectively examined data fromall patients who underwent IUT via umbilical cord route from 2007 to 2016. We calculated the change of the MCA-PSV multiple of median (MoM) as the difference in MCA-PSV MoM between the pre- and immediate postoperative measurements for the first IUT. The change in MCA-PSVMoM was compared between those who did and did not receive fetal anesthesia using Kruskal-Wallis' testing. Results Of 62 patients, 37 (59.7%) received intravenous fetal anesthesia and 25 (40.3%) did not. The change inMCA-PSV MoM did not differ between those who did and did not receive fetal anesthesia (median: 0.57 [interquartile range, IQR: +0.42 to +0.76] vs. median 0.57 [IQR: +0.40 to +0.81], p = 1.000). The relationship remained insignificant when stratifying by gestational age, length of procedure, initial MCA-PSV, and when excluding hydropic fetuses. Conclusion Among women undergoing IUT, there was no evidence that the use of fetal anesthesia was associated with a change in the pre- versus postoperative change in MCA-PSV MoM. [ABSTRACT FROM AUTHOR]

Objective: To evaluate the clinical utility of a novel means of assessing the cervix by measuring the angle of the curvature and to evaluate the performance of this technique as well as two other commonly used techniques of cervical length assessment in predicting spontaneous preterm birth (SPTB).Methods: This was a retrospective cohort analysis of singleton gestations with a history of SPTB. Transvaginal ultrasound images of cervical length obtained between 20 and 23 6/7 weeks were re-measured using three techniques: (1) straight linear distance between the internal and external os, (2) sum of two contiguous linear segments tracing the internal to the external os, and (3) measurement of the angle of the curve within the cervix using an electronic protractor. A short cervical length was defined as ≤25 mm.Results: A total of 181 women were included. The relative risk (RR) for SPTB by cervical angle ≤160° was 1.2 (95% CI 0.7-2.0) and the ROC curve revealed an area under the curve of 0.54 (95% CI 0.44-0.63). The RR for SPTB by short cervical length measured by the straight technique was 2.3 (95% CI 1.3-4.0) and by the segmental technique 2.1 (95% CI 1.2-3.8). There was a 99.4% agreement between the two techniques with an intraclass Kappa coefficient of 0.96.Conclusions: In women with a history of SPTB, cervical angle measurement does not correlate with the risk of SPTB. Cervical length measured via straight and segmental techniques had excellent agreement in identifying short cervix, and both identified a short cervix predictive of SPTB. [ABSTRACT FROM AUTHOR]

Fetal growth restriction is commonly defined as an estimated fetal weight (EFW) that is below the 10th percentile for gestational age. It is associated with an increased risk of intrauterine demise, neonatal morbidity, and neonatal death; therefore, antenatal detection and surveillance with the optimization of delivery timing are necessary to improve pregnancy outcomes. If the estimated due date has been verified and the EFW is below the 10th percentile for gestational age, the underlying cause should be investigated, since the clinical management, outcome, and counseling options are largely dependent on the cause of the growth restriction. Serial ultrasonography (US) for the evaluation of fetal growth and umbilical artery Doppler velocimetry are used to guide pregnancy management decisions. This article describes the accurate US detection and surveillance of fetal growth restriction, discusses the current obstetric and radiology literature regarding the use of Doppler velocimetry in the setting of fetal growth restriction, and describes the techniques for performing umbilical artery Doppler velocimetry. Although various Doppler techniques have been described in the setting of fetal growth restriction, only umbilical artery Doppler assessment is recommended to identify fetuses most at risk for poor outcome and to guide the timing of delivery. The use of other Doppler waveforms in this setting remains investigational. © RSNA, 2017.