File:A treatise on the science and practice of midwifery (1885) (14759569316).jpg

Identifier: treatiseons00play (find matches)
Title: A treatise on the science and practice of midwifery
Year: 1885 (1880s)
Authors: Playfair, W. S. (William Smoult), 1836-1903 Harris, Robert P., ed
Subjects: Obstetrics
Publisher: Philadelphia, Lea Brothers & Co.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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found the pus did not come fromthe placenta, but from an inflammation of the tissue of the uterine ves-sels and an accidental disposition in the tissue of the placenta. Theextravasations of blood here alluded to are of very common occurrence,and they are found in all parts of the organ—in its substance, on itsdecidual surface, or immediately below the amnion, where they serve aspoints of origin for the cysts that are there often observed. The fibrinthus deposited undergoes retrograde metamorphosis, as in other parts ofthe body; it becomes decolorized, it undergoes fatty degeneration, or itbecomes changed into calcareous masses ; and in this way, it is sup-posed, may be explained the various pathological changes which are socommonly observed. The amount of retrograde metamorphosis, andthe precise appearance presented, will of course depend on the time thathas elapsed since the blood-extravasations took place. Fatty Degeneration.—Fatty degeneration of the placenta, and its Fig. 91.
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Fatty Degeneration of the Placenta. influence on the nutrition of the foetus, have been specially studied inthis country by Barnes and Druitt, Yellowish masses of varying sizesare very commonly met with in placentae, and these are found to consist,in great part, of molecular fat, mixed with a fine network of fibrous tis-sue. The true fatty degeneration, however, specially affects the chorion PATHOLOGY OF THE DECIDE A ASH OVUM. 235 villi (Fig. 91). On microscopic examination they are found to bealtered and misshaped in their contour and to be loaded with fine gran-ular fat-globules. Similar changes are observed in the cells of thedecidua. The influence on the foetus will, of course, depend on theextent to which the functions of the villi are interfered with. Theprobable cause of this degeneration is no doubt some obscure alterationin the nutrition of the tissue, depending on the state of the mothershealth. Barnes believes that syphilis has much influence in its produc-tion. Druitt has

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