Principles of pathological anatomy : adapted to the Cyclopedia of practical medicine and Andral's elements / by J. Hope.

  • Hope, James, 1801-1841.
Date:
1845
Catalogue details

Licence: Public Domain Mark

Credit: Principles of pathological anatomy : adapted to the Cyclopedia of practical medicine and Andral's elements / by J. Hope. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    half of the superior lobe a,b. It is in an advanced stage, being on the eve of its transition into hepatization. It is heavier and firmer than natural, and barely floats in water. It pits on pressure, is rather lacerable, only slightly crepitant, and yields less sero-sanguinolent fluid than in an earlier stage of engorge- ment: its color also has less of the deep purple hue. The aveolar or spongy texture is still feebly discernible. In more recent engorgement the color is of the deep rich purple represente d in Fig. 7, b: the exterior is livid or violet, d. Spumous sero-sanguinolent fluid streams after the knife in great abundance. In proportion as the fluid becomes less spu- mous, the crepitation diminishes, and the friability increases, —changes resulting from a diminution of air, and an increase of fluid in the lung. In infants, the crepitation is proportion- ably less than in adults, because the pulmonary structure is more dense: i. e. the air-vesicles are smaller and more numerous. Engorgement depends upon a congestion and stasis of blood in the walls of the capillary bronchi and air-vesicles. Whether it is retained in the vessels, or extravasated into the cellular tissue, or both, admits of doubt: I am inclined to adopt the first opinion. The effect of the congestion is to contract the cavities, and cause a glutinous secretion into them, which, tinged with blood, constitutes the characteristic expectoration in this degree.* [The characteristic expectoration in pneu- monitis, i. e. a glutinous secretion tinged with blood, is by no means constant in that affection. Although the stage of en- gorgement is commonly accompanied by sputa tinged with blood, yet that condition of the lungs may exist, and, indeed, run through its various stages, unattended by any characteristic expectoration. Andral, in his Medical Clinic, details a num- ber of cases of decided pneumonitis, in which the expectora- tion did not indicate the character of the disease. Thus, the expectoration may occasionally be absent, or may present the appearance of an ordinary catarrh, or it may be wholly unin- fluenced by the diseased action. Nor can the rusty colored * Vide L/aenncc, Traitc dc 1'Auscult, i., 433,2d cd.