P08.10: Variability of Doppler measurements in umbilical artery (UA) and middle cerebral artery (MCA) in uncomplicated term pregnancies: Poster discussion hub abstracts

To evaluate the intra-observer variability of the UA and MCA measurements taken under optimal conditions in term, uncomplicated pregnancies. A prospective study that included pregnant women at term with uncomplicated pregnancies. During their evaluation, fetal biometry and Doppler studies were done by a single examiner and 2-3 Doppler measurements per fetus were taken with intervals between each measurement. 100 women were recruited. The variability of the Intra-observer MCI PI versus UA PI and the MCA PSV is shown in figure 1. The Interclass correlation coefficient (ICC) was determined and "best" ICC was found in the MCA measurement (K=0.888) versus a "good" ICC found in the UA measurement (K=0.755). A statistically significant decrease was found in the MCA PI measurements during the interval close to term (37-42 weeks gestation), and between the group of women assessed before 40+0 weeks (n=26) and the group of women assessed between 40+0 to 42+0 weeks gestation (n=76). There was no statistically significant difference in the MCA PSV and UA PI during the interval close to term. A similar difference was found. MCA PI measured at the interval close to term is highly reliable and superior to the UA PI measurement near term. The MCA PI significantly decreases in the weeks close to term. Supporting information can be found in the online version of this abstract Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.