每日一篇医学英语｜placenta previa (2)

placenta previa(2)

胎盘前置发展的诱发危险因素包括：

Risk factors for the development of placenta previa include:

多次妊娠

previous pregnancies,

子宫手术史

previous surgeries of the uterus,

胎盘前置病史

previous placenta previa,

超过一个胎儿

carrying more than one fetus,

孕妇年龄35岁以上

maternal age of 35 or older,

抽烟或者使用可卡因

smoking and cocaine use.

通常在怀孕中期的常规超声波孕检中

The location of the placenta is usually checked

会检查一下胎盘的位置

during a routine ultrasound mid pregnancy.

但此时低位胎盘

But a low-lying placenta at this point

可能并不足以成为你担忧的原因

may not be a cause for concern.

在大多数情况下

In most cases, the placenta grows toward

胎盘会往子宫上部血液供应充足的位置生长

the richer blood supply in the upper uterus

因为在晚期妊娠中子宫会扩张

as the uterus expands in the third trimester.

只有10%的低位胎盘会持续到分娩

Only about 10% of all low-lying placentas persist until delivery.

若胎盘完全覆盖子宫颈

A placenta that completely covers the cervix

那它往往会一直保持原状而非改变位置

is more likely to stay that way than one that’s bordering it.

胎盘前置对母亲和婴儿来说都有非常重大的风险

Placenta previa presents significant risks to both the mother and the baby.

通常这种情况下会进行剖腹产

A caesarean delivery is usually indicated

因为胎盘可能会堵住整个产道

because the placenta may block the birth canal completely,

或者分娩时会出现由于宫颈扩张引起的大出血

or bleed profusely during labor as the cervix dilates.

此时母亲会出现大出血

The mother may experience excessive blood loss

而由于血液供应不足

and the baby may suffer from hypoxia,

婴儿会出现氧气不足的状况

as a result of inadequate blood supply.

治疗目标就是随着生产日期的临近

The goal of treatment is to manage bleeding to

尽量控制出血

get as close to the due date as possible.