الفهرس | Only 14 pages are availabe for public view |
Abstract Objectives: The aim of the present study was to test the hypothesis that standardising the site of sampling of umbilical artery Doppler reduces the variability of umbilical artery Pulsatility Index (PI). Patients and Methods: The present study was Prospective study included 120 pregnant women - with singleton fetuses of 28 week of gestation till term and delivery-attending outpatient clinic at Helwan University Hospitals. All pregnant females were followed monthly minimum for 3 occasions till delivery. Results: The present study revealed the presence of significant variability in the measurements of umbilical artery PI among the sampling sites as well as among the different time points at which the measurements were taken, with poor repeatability and reproducibility of the umbilical artery PI measurements. Variagility in umbilical artery PI among the sampling sites was demonstrated in our study. There were significant differences in the mean umbilical artery PI among the four sampling sites, with higher mean umbilical artery PI at PVC site, followed by AI, FL, and PL sites. Intraclass correlation was computed to test reliability, showing poor agreement among the four sampling sites. These findings suggest that standardization of the site of sampling may reduce variability and increase reliability of measurements. Conclusion: Standardization of the site of sampling may reduce variability and increase reliability of measurements as our study revealed significant variability in the measurements of umbilical artery PI among the 4 potential sampling sites as well as among the different time points at which the measurements were taken, with poor repeatability and reproducibility of the umbilical artery PI measurements. Keywords: Sampling Site, Umbilical Artery Doppler, Variability, Umbilical Artery Pulsatility Index . |