Identifier: 2544073R.nlm.nih.gov
Title: Burns's Obstetrical works : the anatomy of the gravid uterus : with practical inferences relative to pregnancy and labour : observations on abortion : containing an account of the manner in which it takes place : the causes which produce it : and the method of preventing or treating it : practical observations on the uterine hemorrhage : with remarks on the management of the placenta
Year: 1809 (1800s)
Authors: Burns, John, 1774-1850 Burns, John, 1774-1850. The anatomy of the gravid uterus Burns, John, 1774-1850. Observations on abortion Burns, John, 1774-1850. Practical observations on the uterine hemorrhage Kearny, Francis, 1785-1837, engraver
Subjects: Obstetrics Abortion, Spontaneous
Publisher: New-York : Published and sold by Collins and Perkins, printers and importers of medical books to the College of Physicians and Surgeons in New-York, and to the New-York Hospital
Contributing Library: U.S. National Library of Medicine
Digitizing Sponsor: Open Knowledge Commons, U.S. National Library of Medicine

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we find the os ute-ri more or less open, tense during pain, but thick, soft, and as if chopt,during the intervals. The plane of the orifice, at this time, is nearlyparallel to that of the superior aperture of the pelvis, and a little far-ther dilatation brings it exactly into the axis of that aperture. Whenthe childs head passes the rim of the pelvis, and turns forward, it thengets into the vagina, and thus into the axis of the inferior aperture.; EXPLANATION of the ANNEXED PLATE. These figures represent the different changes which take place dur-ing gestation, in the appearance and situation of the cervix and os uteri. Fig 1. Is a lateral section of the uterus and vagina, in the unimpreg-nated state, intended to show the position of the uterus relative to thevagina, and the appearance and projection of the os uteri. Fig 2 Shows the first change which impregnation produces. Theuterus has fallen lower down, and projects more forward. This is theappearance in the second month. Tayc //z:
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173 Of the Muscular Fibres of the Uterus. Concerning the muscular structure of the uterus, therehave been many diputes ; and every anatomist has thoughtthat he has discovered some new course of the fibres, whichhe has described and painted, as if it were really a matterof importance. The old anatomists readily allowed the uterus to be mus-cular ; because, in opening cats, they found it contract andmove like one of the intestines. But, in the human race,this contractibility does not manifest itself until the periodof parturition. With regard to the course of the strata, they first settled,in their own minds, which would best answer for expul-sion, and then painted it. Thus Vesalius describes threestrata of fibres, the external one transverse, the internal oneperpendicular, and the middle one oblique. Malpighi de-scribes them as forming a kind of net work ; whilst Ruyshmaintains, that they appear at the fundus, in concentricplanes, forming an orbicular muscle. Others said, thatthey were2544073R.nlm.nih.gov

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