Janbu T, Nesheim B I
Department of Obstetrics and Gynaecology, Akershus Central Hospital, University of Oslo, Norway.
Br J Obstet Gynaecol. 1987 Dec;94(12):1150-5. doi: 10.1111/j.1471-0528.1987.tb02314.x.
Doppler recordings from branches of the uterine artery were made simultaneously with intrauterine pressure measurements in eight women in labour. Blood velocities fell and pulsatility index (PI) increased during all 22 contractions studied. Velocities were reduced almost linearly by up to 60% when pressure increased from 0 to 50 mmHg. To study the effect of uterine contractions before labour on uterine blood flow, simultaneous Doppler recordings from branches of the uterine artery and external tocodynamometry were made in seven women during the last trimester. Velocities fell during 18 of the 20 contractions studied (median 35%, range 19-71%). Extrapolating from labour contractions, this corresponds to a pressure increase of 30-40 mmHg. Fetal heart rate (FHR) recordings were normal during all contractions.
对8名分娩期妇女的子宫动脉分支进行多普勒记录，并同时测量子宫内压力。在研究的所有22次宫缩期间，血流速度下降，搏动指数（PI）增加。当压力从0升高到50 mmHg时，血流速度几乎呈线性下降，降幅高达60%。为了研究分娩前子宫收缩对子宫血流的影响，在妊娠晚期对7名妇女同时进行子宫动脉分支的多普勒记录和外部宫缩图测量。在研究的20次宫缩中的18次期间血流速度下降（中位数为35%，范围为19%-71%）。根据分娩期宫缩情况推断，这相当于压力升高30-40 mmHg。在所有宫缩期间胎儿心率（FHR）记录均正常。
