...However, if the umbilical cord is relatively long and has only been twisted once, it is possible to cut the cord early or untangle it when the fetus is delivered, and there are many cases where no abnormalities occur. It was previously impossible to check whether the umbilical cord was twisted during pregnancy, but recently, with the use of fetal monitoring devices, it has become possible to estimate whether the umbilical cord is twisted by observing a specific variable FHR deceleration on the fetal heart rate chart. If the bradycardia is severe, a cesarean section may be performed. ... *Some of the terminology that refers to "variable FHR deceleration" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…しかし1回程度の巻絡で臍帯が比較的長いときには,胎児の娩出時に早期に臍帯切断を行ったり,巻絡をほどくことが可能なので,異常なく済むことが多い。妊娠中から臍帯が巻絡しているかどうかを検査することは従来不可能であったが,最近,分娩監視装置が使われるようになり,胎児の心拍数図に特有な変動性一過性徐脈variable FHR decelerationがみられることから,臍帯巻絡の推定ができるようになった。徐脈の程度の強い場合は帝王切開も行われる。… ※「variable FHR deceleration」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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