【正文】
胎兒先露部,稱為前置胎盤 分類 ? 中央型前置胎盤 : the internal cervical os is covered pletely by placenta. ? 部分性前置胎盤 : the internal os is partially covered by placenta. ? 邊緣性前置胎盤 : the edge of the placenta is at the margin of the internal os. ? 低置胎盤 : the placenta is implanted in the lower uterine segment such that the placenta edge actually does not reach the internal os but is in close proximity to it. 分類 前置胎盤類型判定 ?根據(jù)檢查當時,宮口擴張和胎盤位置關系確定如低置胎盤在宮口開 2厘米時,能變成部分性前置胎盤。 臨床表現(xiàn) 無痛性陰道出血 Painless bleeding 5. 陰道出血是否有腹痛是鑒別前置胎盤和胎盤早剝的關鍵點,但仍有 10%前置胎盤患者合并有胎盤早剝。 Etiology 剖宮產(chǎn)史 prior cesarean section ?