title: Postpartum uterine artery blood flow impedance following cesarean section or vaginal delivery.
abstract: OBJECTIVE
  To compare uterine arteries (UtA) blood flow after cesarean section (CS) or vaginal delivery (VD).
  
  
  METHODS
  We performed a prospective case-control study comparing UtA blood flow impedance in patients who delivered by CS or VD. The UtA pulsatility index (PI) was measured with Doppler ultrasound during post partum using a transabdominal convex probe. Maternal and gestational age, parity, gravidity, and delay between delivery and Doppler measurement were noted.
  
  
  RESULTS
  We examined 106 postnatal patients, of whom 35 had CS delivery and 71 had VD. The median delay from delivery to Doppler measurement was 35 hours for the CS group and 32 hours for the VD group. The mean PI following CS and VD was 1.62 ± 0.45 and 1.42 ± 0.47, respectively. Using a linear model, the regression coefficients for mean, right, and left PI were not significantly different depending on the mode of delivery. There was no difference between emergency and elective CS.
  
  
  CONCLUSIONS
  Early postpartum UtA blood flow impedance is not significantly different after CS or VD. © 2015 Wiley Periodicals, Inc. J Clin Ultrasound 44:278-283, 2016.
authors.affiliation: Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
authors.forename: Joel
authors.initials: J
authors.lastname: Baron
authors.affiliation: Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
authors.forename: Reli
authors.initials: R
authors.lastname: Hershkovitz
authors.affiliation: Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.|Clinical Research Center, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
authors.forename: Yael
authors.initials: Y
authors.lastname: Baumfeld
authors.affiliation: Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
authors.forename: Majdi
authors.initials: M
authors.lastname: Imterat
authors.affiliation: Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
authors.forename: Yael
authors.initials: Y
authors.lastname: Sciaky-Tamir
authors.affiliation: Department of Obstetrics and Gynecology, Azienda Ospedaliero-Universitaria Policlinico di Bari, University of Bari, Bari, Italy.
authors.forename: Salvatore A
authors.initials: SA
authors.lastname: Mastrolia
authors.affiliation: Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
authors.forename: Polina
authors.initials: P
authors.lastname: Schwarzman
authors.affiliation: Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
authors.forename: Adi Y
authors.initials: AY
authors.lastname: Weintraub
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D002585:Cesarean Section; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D049590:Postpartum Period / Q000502:physiology*; D011446:Prospective Studies; D011673:Pulsatile Flow / Q000502:physiology*; D018608:Ultrasonography, Doppler / Q000379:methods; D055988:Uterine Artery / Q000000981:diagnostic imaging* / Q000503:physiopathology*
keywords: involution; post partum; puerperium; pulsatility index; uterine artery