The practice of obstetrics, designed for the use of students and practitioners of medicine . lve twists. 8. Stenosis of the Vessels.—The umbilical vein is sometimes narrowed bya local periphlebitis. This occurs at the placental insertion and usually doesno harm. Thrombi sometimes form in the umbilical arteries, as the resultof atheromatous changes, and partially occlude the vessels. If these pro-cesses are extensive, corresponding injury to the fetus of course results. Thisstenosis may be congenital. If the involvement concerns only the vein,hypertrophy follows, with congestion and oedema of t
The practice of obstetrics, designed for the use of students and practitioners of medicine . lve twists. 8. Stenosis of the Vessels.—The umbilical vein is sometimes narrowed bya local periphlebitis. This occurs at the placental insertion and usually doesno harm. Thrombi sometimes form in the umbilical arteries, as the resultof atheromatous changes, and partially occlude the vessels. If these pro-cesses are extensive, corresponding injury to the fetus of course results. Thisstenosis may be congenital. If the involvement concerns only the vein,hypertrophy follows, with congestion and oedema of the placenta. If, however,the arteries are also affected, the circulation of the fetus will be obstructedand the fetus will become oedematous. 9. Cysts.—Serous and mucous cysts are sometimes found in the cord. Thismay result froni cystic degeneration which follows some obstruction to its circulation, and as a result a collection of serumformed in the spaces beneath the amniotic cover-ing and in the tissues of the allantois. Possiblyit is a result of the liquefaction of Whartons jelly,.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
