On the therapeutic application of electro-magnetism in the treatment of rheumatic and paralytic affections / By Robert Froriep ; tr. from the German by Richard Moore Lawrance.

  • Froriep, Robert, 1804-1861.
Date:
1850
Catalogue details

Licence: Public Domain Mark

Credit: On the therapeutic application of electro-magnetism in the treatment of rheumatic and paralytic affections / By Robert Froriep ; tr. from the German by Richard Moore Lawrance. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    exudation of a portion of the blood through the coats of the vessels is common to all exhalations. The question arises, What causes the fluid to escape from its natural channels ? It may happen either from some alteration in its consistence or composi- tion, from congestion, from debility, or from some change in the texture of the sides of the vessels. It is well known that these are porous, that the external and middle coats are composed of fibres, and the inner one of a thin serous membrane. The fluid of course escapes more easily when the porosity is increased, and a membrane composed of fibres must naturally be more porous when distended, the spaces between the fibres becoming larger. There- fore, in every case where the blood is not altered, effusion is preceded by a distension of the vessels, which may be caused either by congestion, debility, or relaxation of the coats of the vessels. Henle directed his attention to this subject, as appears in his works on Pathological Investigations and General Anatomy, and says, in the last work (page 522), Increased contraction of the capil- laries causes paleness, and restricts the escape of the plasma; atony and paralysis of them produce redness and an increased collection of the plasma;