title: Fetal Doppler ultrasound assessment of ductus venosus in a 31-40 [corrected] weeks gestation normal fetus in the Pakistani population.
abstract: OBJECTIVE
  To evaluate the ductus venosus hemodynamic parameters in 31-40 weeks gestation normal fetus in the Pakistani population using Doppler ultrasonography.
  
  
  METHODS
  In a standardized protocol 106 pregnant women (31 to 40 gestation weeks) were scanned. The peak systolic velocity (maximum velocity during S wave) (PSV), peak velocity index (peak velocity S wave minus peak velocity A wave/peak velocity D wave) (PVI), and S/A ratio (peak velocity S wave/peak velocity A wave) were measured.
  
  
  RESULTS
  Out of 106 patients, 100 patients were successfully scanned (94% success rate). In the 31-35 weeks gestational age group the mean PSV was 59.7 cm/s, PI 0.7, and S/A 2.16. In the 36-40 weeks gestational age group the mean PSV was 72.9 cm/s, PI 0.42, and S/A 2.46.
  
  
  CONCLUSIONS
  As the normal pregnancy advances the PSV, the flow resistance and S/A ratio in ductus venosus increase.
authors.affiliation: Ian Donald Interuniversity School for Obstetrical and Gynecological Ultrasound, Pakistani branch, Faculty of Radiological Sciences and Medical Imaging, Alzaiem Alazhari University, Khartoum, Sudan. profgilani@gmail.com
authors.forename: Syed Amir
authors.initials: SA
authors.lastname: Gilani
authors.forename: Amber
authors.initials: A
authors.lastname: Javaid
authors.forename: Alsafi Abdella
authors.initials: AA
authors.lastname: Bala
mesh_terms: D000328:Adult; D001783:Blood Flow Velocity; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008875:Middle Aged; D011247:Pregnancy; D011256:Pregnancy Outcome; D011263:Pregnancy Trimester, Third; D012016:Reference Values; D018608:Ultrasonography, Doppler; D016216:Ultrasonography, Prenatal / Q000379:methods*; D014471:Umbilical Veins / Q000000981:diagnostic imaging* / Q000502:physiology; D014682:Vena Cava, Inferior / Q000000981:diagnostic imaging* / Q000502:physiology