Identifier: systemri01hirs (find matches)
Title: A system of obstetrics
Year: 1888 (1880s)
Authors: Hirst, Barton Cooke, 1861-1935
Subjects: Obstetrics
Publisher: Philadelphia, Lea brothers & co.
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: Open Knowledge Commons and Yale University, Cushing/Whitney Medical Library

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e cavity, leavinga vacant space behind itself which immediately becomes filled withblood.2 To this retro-placental effusion of blood some would attributethe separation of the placenta, but it is evidently an effect and not acause, for it is not constant, and the amount of blood is rarely sufficientto push the placenta off from the uterus, even were it conceivable thatthe blood is forced out of the vessels wTith such violence as to remove 1 Sectional Anatomy of Labor, Edinb. Med. Journ., Oct. and Nov., 1887. 2 See the observations made by Stratz and Barbour, who introduced their hands intothe uterine cavity immediately after the expulsion of the foetus: Die Naehgeburtsperi-ode; der Scluvanyere u. kreissende Uterus; and Edinb. Med. Journ., Oct., 1887. 630 MECHANISM AXD TREATMENT OF LABOR. an obstruction weighing a pound or more. Occasionally, one part ofthe uterine muscle seems to contract with more vigor than another, Fig. 266. Placenta separated from its site andhanging free Membranes
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Membranes In which the Placenta is Partly Adherent (Strafe). or else one portion of the placenta adheres more closely than another.At all events, the condition shown in Fig. 2(ib is the result—a separa- THE MECHANISM OF THE THIRD STAGE OF LABOR. 631 Fig. 267.

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