The Columbus Medical Journal, 1889, Vol. 7 (Classic Reprint)

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Excerpt from The Columbus Medical Journal, 1889, Vol. 7In inspiration the act is performed by muscular od'ert compelling the air vesicles to dilate, in expiration the muscular and lung tissues expel the air by the force of their elasticity, no muscular force being required. Respiration thus goes on automatically, being only to a limited extent con trolled by the will. If now by the enfeeblement of the muscular force of the walls, or by reason of the inelasticity of the air vesicles, air can not be conveyed into the lungs in sufficient quantity to allow of the proper interchange of elements and the expulsion of elfete material there after, then must death take place in the portion so impaired.The lower portion of the thorax being capable of greater movements than the apex, by reason of its form, as well as by the easy depression of the diaphragm, the direction of the ingoing current of air must be, for mechanical reasons, toward the base of the lung. The apex being sm rounded by almost immovable bone structures cannot possibly draw to it a proportionate amount of air, so it is reasonable to suppose that a deh ciency would be noticed here first in a great majority of cases, deep and frequently repeated inspirations being required to fully dilate the vesicles of that locality. It is well known that a greater number of cases of con sumption are discovered incipiently affecting one or both spices, and consolidation of the left apex is more frequently conclusive of that dis ease, for by the anatomical arrangement of the left bronchus the air is more readily de¿ected toward the hue of the lung of that side. Statis~ tics show that more men die from tubercular, as well as other forms of phthisis, than women, the abdominal respiration of the former tends to a drawing of air into the base of the lung, whilst the more typical tho~ racic breathing of the latter tends to a more complete aeration of the apex. Professor Momo has shown that the lung capacity is almost one fourth larger than necessary to keep up the necessary aeration at the sea level. This being the fact, those portions of the lung more easily sup plied will receive and expel more air proportionally than those which are more dificult of access. 80 that in ordinary respiration the spices may be entirely passive, expansion of their vesicles not taking place as fully or regularly as necessary to keep up normal respiration. A potent factor, therefore, in the etiology of phthisis is the lack of proper expansion of the whole lung. Apicial as well as basilar expansion is necessary for a pafectly healthy pulmonary condition.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.