<正>新生儿持续性肺动脉高压(persistent pulmonary hypertension of the newborn,PPHN)又称持续胎儿循环(per-sistent fetalcirculation,PFC),是指多种病因引起新生儿生后肺血管阻力持续性增高,肺动脉压超过体循环动脉压,