Nothnagel's Encyclopedia of Practical Medicine (Volume 9); Fitz, R. H. Diseases of the liver, pancreas and suprarenal capsules

9780217521390: Nothnagel's Encyclopedia of Practical Medicine (Volume 9); Fitz, R. H. Diseases of the liver, pancreas and suprarenal capsules

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1905 Excerpt: ... Clinical Features Of Anemia. INTRODUCTION. In order to obtain a general grasp of anemia we must recur to the definition proposed at the beginning, which designated it as "a quantitative or qualitative diminution in the amount of blood." In addition to a physiologic capability of alteration which is not slight, the blood possesses an extraordinary power of preserving its normal composition. It compensates not only for the very fine alterations in its composition, not appreciable to our senses, which it is continually experiencing in its ceaseless changing relations to the organs, but is also capable of withstanding to a surprising degree many coarse influences, as, for instance, many experiments. Foreign bodies, the smallest particles of coloring-matter, bacteria, etc., are excreted from the circulation as rapidly as they can be introduced. Even chemic foreign substances or abnormal amounts of normal constituents introduced into the blood are usually so quickly excreted that after a few circulatory cycles no trace of the interference is percetible. Just as in these experiments, the blood preserves its normal composition under the influence of numerous factors which affect the organism in general or the blood in particular. Severe diseases of vitally important organs may run a regular course without any recognizable alteration in the blood. Moreover, there may be frequently repeated slight losses of blood without even a transitory abnormality becoming evident. This power of resistance naturally has its limits, both in regard to the kind as well as to the duration and the intensity of the inimical influence, since the continuance of the normal composition depends on constancy of the relation between blood formation and blood destruction. A decrease in the bloo...

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