Acceleration time in normal fetal umbilical artery at term and its relationship to the cord blood hematocrit
✍ Scribed by Fong-Ming Chang; Bor-Lin Yao; Chen-Hsiang Yu; Soon-Cen Huang; Yue-Shan Lin; Huei-Chen Ko
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 476 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0091-2751
No coin nor oath required. For personal study only.
✦ Synopsis
The purpose of this study was to test the hypothesis that the acceleration time (AT) of the fetal umbilical artery remains constant at term for normal pregnancies. In addition, we also examined whether the AT has any correlation with umbilical cord blood hematocrit (Hct). In total, 539 normal-term fetuses with menstrual ages (MA) ranging from 37 weeks to 42 weeks were enrolled in a cross-sectional design. The AT of the fetal umbilical artery was measured prior to delivery using a high-resolution, real-time Doppler scanner. All were delivered within 2 days of the ultrasound examination. At parturition, blood from the umbilical vein was collected and the red cell indices, including the Hct, were determined. The results indicated that the mean values of AT of the umbilical artery remained constant during normal-term pregnancies from 37 weeks to 42 weeks, menstrual age (mean: 0.104 sec, SE: 0.001 sec, n = 539