The practice of obstetrics, designed for the use of students and practitioners of medicine . nt of the in-cessant repetition of the shock of pulsation. Rarely a true knot forms; falseknots are the result of local increase of Whartons jelly (Figs. 291 and 290). Theobstruction of the umbilical vessels causes a more or less complete arrest of thecirculation, which decidedly hinders the development of the fetus and mayeven cause its death. 6. Tangling.—In multiple pregnancies the cords sometimes become tan- ANOMALIES OF-THE UMBILICAL CORD. 239 gled, and this accident results nearly always in asphy
The practice of obstetrics, designed for the use of students and practitioners of medicine . nt of the in-cessant repetition of the shock of pulsation. Rarely a true knot forms; falseknots are the result of local increase of Whartons jelly (Figs. 291 and 290). Theobstruction of the umbilical vessels causes a more or less complete arrest of thecirculation, which decidedly hinders the development of the fetus and mayeven cause its death. 6. Tangling.—In multiple pregnancies the cords sometimes become tan- ANOMALIES OF-THE UMBILICAL CORD. 239 gled, and this accident results nearly always in asphyxiation of both fetuses, with their expulsion (Figs. 281 and 282). 7. Torsion.—This is a twisting of the cord on its long axis. It occurs most commonly about the seventhmonth. It was formerly supposed tobe due to active movements on thepart of the fetus, but it has recentlybeen shown that, while a certainamount of torsion may be producedby fetal movements, it is never cap-able of occluding the vessels, and thatthe higher degrees of torsion occurafter the death of the fetus (Schauta),. Fig. 282.—Coiling of Both Umbilical CordsOF Twins, about Each Other and aboutA Leg. Also Two True Knots.—(Winc-kel.)
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
