v.栓塞；發(fā)生栓塞
Amniotic fluid may gain access to uterine veins following a tear in the placental membranes and embolize to the lungs, producing acute dyspnea with cyanosis and shock. 羊水通過羊膜的破裂口進(jìn)入子宮靜脈栓塞到肺，引起急性呼吸困難，伴面色蒼白和休克。
