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胎兒臍帶繞頸準媽媽如何應(yīng)對 臍帶繞頸的危險有哪些(2)

出處：媽媽育兒網(wǎng) 日期：2016-08-23 11:36:55 編輯：七七

但需要注意的是，一次B超檢查沒有看到臍帶繞頸，并不能保證將來不會有繞頸的情形，也許不久后寶寶的一個翻身，臍帶就纏住了脖子；相對的，這一次發(fā)現(xiàn)了臍帶繞頸，經(jīng)過一段時間的活動后，寶寶也可能掙開了纏繞。

臍帶繞頸的危險有哪些？

孕育時：發(fā)生胎兒窘迫

好在臍帶是有一定長度的，大多數(shù)時候繞在寶寶脖子上的臍帶就好比一條圍巾松松地圍著，在這種情況下，臍帶和寶寶的脖子都沒有受到壓迫，也就不會產(chǎn)生危險。

如果臍帶不夠長，或者頑皮的寶寶將它在脖子上繞了好幾圈的話，臍帶就會勒緊而影響寶寶的血液供應(yīng)，這時危險就悄悄來臨了。由于臍帶受到壓迫，營養(yǎng)和氧氣的供應(yīng)減少了，寶寶生長所需供應(yīng)匱乏，就會發(fā)生胎兒生長遲緩，甚至發(fā)生胎兒窘迫。

分娩時：胎兒缺氧

另一種危險則發(fā)生在分娩時，當自然分娩時，胎兒在子宮收縮的力量壓迫下，要通過開大的宮頸口沿著產(chǎn)道下降，隨著胎兒的位置逐漸下降，臍帶也被逐漸拉緊。在正常情況下，臍帶有足夠的長度讓胎兒安全娩出，如果有臍帶繞頸的情況，它的長度就相對減少了，可能會勒得過緊，使胎兒缺氧。

胎兒臍帶繞頸一定要剖腹產(chǎn)嗎？

臍帶繞頸對分娩的影響主要有兩方面：

臍帶繞頸會使臍帶變短，從而影響胎先露部入盆，導(dǎo)致產(chǎn)程延長或停滯。

臍帶繞頸周數(shù)過多、過緊時或?qū)m縮時，臍帶會因為受到牽拉，而使胎兒血循環(huán)受阻，導(dǎo)致胎兒宮內(nèi)缺氧。

處理臍帶纏繞是否一定要剖腹產(chǎn)，主要根據(jù)產(chǎn)程進展情況以及纏繞對胎兒的影響程度決定。

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