The mother's manual of children's diseases / by Charles West.

  • West, Charles, 1816-1898.
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: The mother's manual of children's diseases / by Charles West. Source: Wellcome Collection.

    52/268 (page 36)
    We breathe in health so without conscious effort that we never realise the fact that, according to the calculation of most competent observers, the mere elasticity of the lungs, independent even of the elasticity of the chest walls, opposes a resistance to each inspiration equal to 150 pounds avoirdu- pois in the grown man and 120 in the grown woman. The want of breath puts the respiratory muscles into play : the man takes a deep inspiration, and by this unconscious effort, he overcomes the resistance of the chest and the elasticity of the lungs. The new-born infant feels the same want and makes the same effort; but its muscular power is small, and its inspirations are often so feeble as to draw the air in some parts only into the larger tubes, while many of the smaller remain undilated, and much of the lung continues in the state in which it was before birth. The blood being thus but imperfectly purified, all the processes of nutrition go on imperfectly, the vital powers languish, the inspiratory efforts become more and more feeble, while the elasticity of the lung is constantly tending to empty the small cells of air and to oppose its entrance, and next the temperature sinks and the infant dies. Cases in which this condition of the lungs exists usually present the history of the child from the very first having failed to utter a strong and loud cry like that of other children. Even after breathing has gone on for some time, such children usually appear feeble, and they suck with difficulty, although they often make the effort. An infant thus affected sleeps even more than new-born infants usually do ; its voice is very feeble, and rather a whimper than a cry. In the cry of the healthy infant you at once detect two parts—the loud cry, suffering or passionate as the case may be, and the less loud back draught of inspiration. The French have two words for these two sounds—the cri and the repj-ise. The cn is feeble, the reprise is altogether wanting wherever expansion of the lung has to any considerable extent failed to take place, and you would hail this second sound as the best proof of an improvement in the child’s condition.