Selected monographs on dermatology / Unna, Nielsen, Duhring, Bronson, Blanc, Berger, Prince-Morrow.

  • New Sydenham Society.
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Selected monographs on dermatology / Unna, Nielsen, Duhring, Bronson, Blanc, Berger, Prince-Morrow. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    LECTURES OU THE GENERAL PATHOLOGY OE THE SKIN. DELIVERED IN THE WINTER SESSION, 1888-89.1 I. Anjemja. The vessels of the skin undergo greater changes of calibre within physiological limits than do those of any other organ, and this is due to the great development of its muscular and nervous apparatus. In its pathology, too, contraction of the vessels plays an important part, but here other factors are also at work in producing anasmia, viz. qualitative and quan- titative changes in the total amount of blood in circulation. If the anaemia be caused by contraction of vessels, the skin feels cooler and often less succulent; but if the tone of the vessels remain normal, the temperature and the amount of fluid in it may be as before, although it may be ansemic. Hence anasmia of the skin may be divided into two great groups: (1) Anaemia due to general alterations in the total quantity of blood, and (2) Anasmia confined to the skin. Anasmia consequent on qualitative blood-changes may be due to a deficiency of red, or an increase of white, corpuscles, or to a combination of both factors. A want of red cor- puscles makes the skin and mucous membranes anaemic in true chlorosis, in acute and chronic inanition where the 1 Vorlesungen iiber allgemeine Pathologie der Haut, gehalten in Winter- semester, 1888-89—'Monatsh. fur prakt. Derm.,'ix Bd., 1889, Nos. t, 2, 6, 8, and x Bd., 1890, Nos. 3, 4, 6, 7—I. Anamie.