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新生儿动脉导管关闭时间及其对心功能的影响 被引量:3

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摘要 新生儿动脉导管的关闭是一个自然的过程,随着肺呼吸功能的建立,肺血流阻力下降,动脉血氧饱和度迅速上升,血管活性物质的释放等使动脉导管发生收缩关闭。动脉导管关闭分为两期,第一期为生理性关闭或功能性关闭,研究证实几乎所有的足月儿在生后72h左右动脉导管即完成功能上的关闭,而早产儿动脉导管的功能性关闭则稍晚,不同胎龄早产儿动脉导管未闭的发生率和自然关闭时间差异较大。
出处 《中华全科医学》 2011年第4期625-626,共2页 Chinese Journal of General Practice
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