Moll W, Wallenburg H C, Kastendieck E, Voslar M
Pflugers Arch. 1978 Nov 30;377(3):225-8. doi: 10.1007/BF00584276.
Uteroplacental arteries of 4 rhesus monkeys were cannulated at their myometrical portions and perfused with dextran solutions and blood. Pressure-flow curves were obtained for the spiral artery and the related intervillous space, i.e. for the functional cotyledonary unit of the haemochorial villous placenta. For a flow of 3 ml.min-1, which is probably the normal rate of flow through the spiral artery, the pressure at the entry of the spiral artery was found to be 13--18 mm Hg (1.7--2.4kPa) during uterine relaxation (uterine diastole). There was a direct proportional relationship between the spiral artery flow and the pressure difference between the spiral artery and the amniotic fluid; the pressure difference per flow (the resistance of the cotyledonary unit) was found to be 1--3 mm Hg . ml-1 . min (8--24kPa . ml-1 . s). It is concluded that the spiral artery and the related intervillous space do not offer a limiting resistance to maternal blood flow in the absence of uterine contractions.
对4只恒河猴的子宫胎盘动脉在其子宫肌层部分进行插管，并灌注葡聚糖溶液和血液。获得了螺旋动脉及相关绒毛间隙的压力-流量曲线，即血绒毛膜胎盘功能叶单位的压力-流量曲线。对于3ml·min⁻¹的流量（这可能是通过螺旋动脉的正常流速），发现在子宫舒张期子宫松弛时，螺旋动脉入口处的压力为13 - 18mmHg（1.7 - 2.4kPa）。螺旋动脉血流量与螺旋动脉和羊水之间的压力差呈直接比例关系；每单位流量的压力差（叶单位的阻力）为1 - 3mmHg·ml⁻¹·min（8 - 24kPa·ml⁻¹·s）。得出的结论是，在没有子宫收缩的情况下，螺旋动脉及相关绒毛间隙对母体血流不构成限制性阻力。
