Uterine blood flow velocity waveforms during early postpartum course following Caesarean section

Transrectal Doppler sonography of uterine blood flow during the first two weeks after parturition in Simmenthal heifers

“…Studies conducted using this technique showed an association between uterine blood flow and delayed uterine involution [11,13,18,22]. In cows, Doppler sonography has been used to assess uterine blood flow during the estrous cycle [4] and pregnancy [3,10,20], as well as in the postpartum period [14], although the intervals between examinations were relatively long in the latter study.…”

Longitudinal study of Doppler flow resistance indices of the uterine arteries after normal vaginal delivery

“…High diastolic flow velocities in combination with a disappearance of the early diastolic notch are the main characteristics of the uterine artery Doppler flow pattern from gestational week 20–26 (5–9), and reflect the physiological conversion from a high (non‐pregnant) to a low (pregnant) resistance state (5–9). How rapidly these physiological changes return to the non‐pregnant state is a controversial issue (16–21). A small number of studies (16–21) have been published regarding the haemodynamic events that occur during the puerperium, and the results have been contradictory.…”

Postpartum uterine artery blood flow impedance following cesarean section or vaginal delivery

“…[6][7][8][9][10] In our study, all measurements were obtained during the first 72 hours in order to represent the immediate and early changes. Nakai et al 13 investigated postpartum UtA flow following CS and found that, in the early postoperative days, the resistance index did not change remarkably between the third and ninth postoperative days. Nevertheless, they started Doppler measurements on the third postpartum day, thus lacking the immediate postpartum changes, and there was no control group.…”