placenta previa(2)

胎盤(pán)前置發(fā)展的誘發(fā)危險(xiǎn)因素包括：

Risk factors for the development of placenta previa include:

多次妊娠

previous pregnancies,

子宮手術(shù)史

previous surgeries of the uterus,

胎盤(pán)前置病史

previous placenta previa,

超過(guò)一個(gè)胎兒

carrying more than one fetus,

孕婦年齡35歲以上

maternal age of 35 or older,

抽煙或者使用可卡因

smoking and cocaine use.

通常在懷孕中期的常規(guī)超聲波孕檢中

The location of the placenta is usually checked

會(huì)檢查一下胎盤(pán)的位置

during a routine ultrasound mid pregnancy.

但此時(shí)低位胎盤(pán)

But a low-lying placenta at this point

可能并不足以成為你擔(dān)憂的原因

may not be a cause for concern.

在大多數(shù)情況下

In most cases, the placenta grows toward

胎盤(pán)會(huì)往子宮上部血液供應(yīng)充足的位置生長(zhǎng)

the richer blood supply in the upper uterus

因?yàn)樵谕砥谌焉镏凶訉m會(huì)擴(kuò)張

as the uterus expands in the third trimester.

只有10%的低位胎盤(pán)會(huì)持續(xù)到分娩

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

若胎盤(pán)完全覆蓋子宮頸

A placenta that completely covers the cervix

那它往往會(huì)一直保持原狀而非改變位置

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

胎盤(pán)前置對(duì)母親和嬰兒來(lái)說(shuō)都有非常重大的風(fēng)險(xiǎn)

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

通常這種情況下會(huì)進(jìn)行剖腹產(chǎn)

A caesarean delivery is usually indicated

因?yàn)樘ケP(pán)可能會(huì)堵住整個(gè)產(chǎn)道

because the placenta may block the birth canal completely,

或者分娩時(shí)會(huì)出現(xiàn)由于宮頸擴(kuò)張引起的大出血

or bleed profusely during labor as the cervix dilates.

此時(shí)母親會(huì)出現(xiàn)大出血

The mother may experience excessive blood loss

而由于血液供應(yīng)不足

and the baby may suffer from hypoxia,

嬰兒會(huì)出現(xiàn)氧氣不足的狀況

as a result of inadequate blood supply.

治療目標(biāo)就是隨著生產(chǎn)日期的臨近

The goal of treatment is to manage bleeding to

盡量控制出血

get as close to the due date as possible.