title: [Velocimetry of the ductus venosus in the first stage of labor].
abstract: OBJECTIVE
  To assess feasibility and physiological variation of fetal ductus venosus Doppler velocimetry during the first stage of labor between uterine contractions.
  
  
  METHODS
  A prospective cross-sectional study including 23 healthy women with low-risk pregnancies. Maximum velocities during ventricular systole (S) and atrial contraction (A) were recorded in the ductus venosus between contractions. Pulsatility index for veins (DV PIV) and the ductus venosus index (DVI) were also calculated.
  
  
  METHODS
  Department of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University, Martin.
  
  
  RESULTS
  Acceptable ductus venosus waveforms were acquired in 19 fetuses (83%). The mean +/- SD values of the ductus venosus index and the pulsatility index were 0.46 +/- 0.07 (95% CI: 0.42-0.49) and 0.57 +/- 0.12 (95% CI: 0.51-0.63), respectively. The mean +/- SD values of maximum velocities during ventricular systole (S) and atrial contraction (A) were 65 +/- 8 cm/s and 35 +/- 5 cm/s, respectively.
  
  
  CONCLUSIONS
  Ductus venosus blood flow velocities can be assessed during labor. This calls for an extension of the detection possibilities of intrauterine fetal status and gives an idea to establish reference ranges for these circulation parameters during labor in the future.
authors.affiliation: Gynekologicko-pôrodnicka klinika, Jeseniova lekárska fakulta, Univerzita Komenského, Martin. szunyogh.norbert@stonline.sk
authors.forename: N
authors.initials: N
authors.lastname: Szunyogh
authors.forename: P
authors.initials: P
authors.lastname: Zúbor
authors.forename: S
authors.initials: S
authors.lastname: Galo
authors.forename: J
authors.initials: J
authors.lastname: Visnovský
authors.forename: J
authors.initials: J
authors.lastname: Danko
mesh_terms: D001783:Blood Flow Velocity; D004628:Embryonic Structures / Q000000981:diagnostic imaging; D005260:Female; D005318:Fetal Heart / Q000502:physiology; D006801:Humans; D007747:Labor Stage, First; D009200:Myocardial Contraction; D011247:Pregnancy; D011673:Pulsatile Flow; D018608:Ultrasonography, Doppler; D016216:Ultrasonography, Prenatal; D014680:Veins / Q000000981:diagnostic imaging* / Q000196:embryology