Volume 1

Pediatrics : the hygienic & medical treatment of children / by Thomas Morgan Rotch.

  • Rotch, T. M. (Thomas Morgan), 1849-1914.
Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: Pediatrics : the hygienic & medical treatment of children / by Thomas Morgan Rotch. Source: Wellcome Collection.

    23/668 (page 21)
    TABLE 1. POST-NATAL CHANGES OF FCETAL CONDITIONS. Ductus Venosus.—The ductus venosus becomes a fibrous cord in the fissure of the ductus venosus in from two to five days. Eustachian Valve.—The intra-uterine function of the Eustachian valve practically disappears at once at birth, but its remains can be found for an indefinite period, as you see in this heart dissected by Dr. F. Dexter (Fig. 19, facing page 74). Foramen Ovale.—The foramen ovale usually closes about the tenth day, but the upper part sometimes never closes. The closed foramen ovale is seen in this same heart dissected by Dr. F. Dexter (Fig. 19, facing page 74). Ductus Arteriosus.—The ductus arteriosus is about 1.5 cm. (f inch) long, has a diameter of about .25 cm. (£ inch), and is usually, so far as being pervious to the blood is con- cerned, obliterated in from four to ten days. Its remains, forming a fibrous cord connecting the pulmonary artery and the aorta, can be seen in this heart dissected by Dr. F. Dexter (Fig 20, facing page 74). Umbilical Vein.—The umbilical vein becomes the round ligament of the liver, and is obliterated in from two to five days. As pointed out by Jacobi, it differs from the arteries very much less than is usual with the veins and arteries in other parts of the body. Its muscular layer is very large and strong. Umbilical Arteries.—The umbilical arteries in their upper parts become obliterated in from two to five days, forming the anterior true ligaments of the bladder, while the lower parts remain pervious and form the superior vesical arteries. The umbilical arteries are usually thick and strong, owing to the great development of their muscular layer. rhus you will observe that during the first two weeks of infancy we Fig. 1. Heart, natural size, at two days. A marks the aorta; PA marks the pulmonary artery ; DA marks the ductus arteriosus. mav have conditions existing physiologically which after that time would become pathological, and hence, to be well grounded in the diagnosis of