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异位妊娠中输卵管妊娠居首位,占95%以上;间质部妊娠少见,仅占后者的1～2%。输卵管间质部全长约2.0cm,位于宫角,是输卵管通向子宫的交接处, 有子宫肌组织包绕,为子宫、卵巢动脉相遇汇集处,血运丰富。54%的间质部呈蛇形走行,该处输卵管粘膜皱襞逐渐消失,纤毛减少,蠕动功能减弱。受精卵如发育稍有迟延,可于此处着床而形成间质部妊娠。根据孕卵着床后的发育方向,Hoehne Veit 作如下分类:向输卵管峡部发育者为输卵管间质型;向子宫方向发育者为输卵管子宫型;在间质部发育者为纯间质型。各型临床经过也略有差异,向子宫方向者易与宫角妊娠相混;向峡部发育者妊娠时间多短于其他二型。我院30年来收治输卵管妊娠1003例,间质部妊娠13例,发病率为1.2%,低于国内外报道。
Ectopic pregnancy tubal pregnancy ranks first, accounting for more than 95%; interstitial pregnancy rare, accounting for only 1 to 2% of the latter. The full length of the tubal interstitial about 2.0cm, located in the corner of the palace, is the junction of the fallopian tube leading to the uterus, uterine muscle tissue around the uterus, ovarian artery meet the Department of convergence, rich blood supply. 54% of the interstitial serpentine walk, the Department of tubal mucosa folds gradually disappear, reduce cilia, peristalsis function weakened. Fertilized eggs, such as the development of a slight delay, where implantation and the formation of interstitial pregnancy. Hoehne Veit is classified according to the developmental orientation of the pregnant egg after implantation, as follows: the tubal isoforms to the isthmus of the fallopian tube; the oviduct is the uterine of the uterus; and the interstitial is purely of the interstitial type. Various types of clinical experience is also slightly different to the direction of the uterus easily mixed palace corner pregnancy; to isthmus developmental pregnancy shorter than the other two types. In the past 30 years, 1003 tubal pregnancy patients and 13 pregnant women with interstitial pregnancy have been treated in our hospital, with a prevalence of 1.2%, lower than those reported at home and abroad.