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Uterine activity and ductus venosus flow velocity patterns during the first stage of labor
Author(s) -
Szunyogh N.,
Zubor P.,
Dokus K.,
Galo S.,
Visnovsky J.,
Danko J.
Publication year - 2006
Publication title -
international journal of gynecology and obstetrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 97
eISSN - 1879-3479
pISSN - 0020-7292
DOI - 10.1016/j.ijgo.2006.05.017
Subject(s) - ductus venosus , medicine , pulsatility index , contraction (grammar) , cardiology , cardiac cycle , blood flow , systole , fetus , pregnancy , diastole , blood pressure , biology , genetics
Objective : To analyze the effects of uterine contractions on ductus venosus (DV) pulsatility during the first stage of labor. Methods : Twenty healthy women were examined. Measurements were taken at three stages of cervical dilatation (< 4 cm, 4–7 cm and ≥ 8 cm) during and between contractions. Peak velocity during ventricular systole ( S ) and atrial contraction ( A ), pulsatility index for veins (DV PIV), ductus venosus index (DVI) and the S / A ratio were measured. Results : The DV was observed successfully in 16 cases. The mean S velocity did not change significantly (64 cm/s during and 65 cm/s between contractions). The mean A velocity decreased significantly from 35 cm/s measured between contractions to 29 cm/s during contractions ( P < 0.0001). The mean DV PIV and DVI were significantly higher during contractions (0.72 and 0.55) than between contractions (0.57 and 0.45) ( P < 0.0001). There were no significant differences in means between stages of cervical dilatation. Conclusion : Significant differences during and between uterine contractions can be observed in DV pulsatility during normal labor.