title: Hepatic vein and portal vein Doppler ultrasound of maternal liver in normal pregnancy.
abstract: OBJECTIVE
  The purpose of our study was to evaluate the changes occurring in maximum flow velocity and waveform patterns of the portal and hepatic veins during pregnancy in second and third trimesters.
  
  
  METHODS
  A total of 204 patients were randomly divided into the study and control groups. The control group was classified as group I; the study group was divided into two groups: group II, second trimester pregnancy (14-26 weeks, n = 91) and group III, third trimester pregnancy (26-40 weeks, n = 63). Vein waveforms were classified as triphasic, biphasic and monophasic.
  
  
  RESULTS
  Maximum flow velocities of both right hepatic vein and main portal veins were lower in group III compared with group I and group II (p < 0.05). On the basis of hepatic vein and portal vein waveforms, the incidence of biphasic pattern was prominent in group II (p < 0.05) whereas the monophasic pattern was prominent in group III (p < 0.05).
  
  
  CONCLUSIONS
  The results demonstrate that as gestational age progresses, maximum flow velocities of both right hepatic vein and main portal veins intend to be decreased with an increased incidence of monophasic wave form pattern, and may be accepted as sensitive parameters of indicators of physiological adaptations related to pregnancy.
authors.affiliation: a Department of Radiology and.
authors.forename: Mustafa Fatih
authors.initials: MF
authors.lastname: Erkoc
authors.affiliation: a Department of Radiology and.
authors.forename: Aylin
authors.initials: A
authors.lastname: Okur
authors.affiliation: b Department of Obstetrics and Gynecology , School of Medicine, Bozok University , Yozgat , Turkey .
authors.forename: Mustafa
authors.initials: M
authors.lastname: Kara
authors.affiliation: b Department of Obstetrics and Gynecology , School of Medicine, Bozok University , Yozgat , Turkey .
authors.forename: Emel
authors.initials: E
authors.lastname: Caglayan
authors.affiliation: a Department of Radiology and.
authors.forename: Halil Ibrahim
authors.initials: HI
authors.lastname: Serin
authors.affiliation: c Department of Radiology , Sisli Etfal Education and Research Hospital , Istanbul , Turkey , and.
authors.forename: Sukru Mehmet
authors.initials: SM
authors.lastname: Erturk
authors.affiliation: a Department of Radiology and.
authors.forename: Fatma
authors.initials: F
authors.lastname: Gundogdu
authors.affiliation: d Department of Nuclear Medicine , School of Medicine, Bozok University , Yozgat , Turkey.
authors.forename: Seyhan
authors.initials: S
authors.lastname: Karacavus
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D005260:Female; D006499:Hepatic Artery / Q000000981:diagnostic imaging*; D006503:Hepatic Veins / Q000000981:diagnostic imaging*; D006801:Humans; D008099:Liver / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second / Q000502:physiology*; D011263:Pregnancy Trimester, Third / Q000502:physiology*; D018608:Ultrasonography, Doppler; D016216:Ultrasonography, Prenatal; D055815:Young Adult
keywords: Doppler USG; hepatic vein; portal vein; pregnancy