Breathing apparatus

“ I. That must answer our purpose, dear Ann. Of the change which takes place in the blood, and of the renewal of our physical system, which is effected by circulation, I shall say nothing. We will pass to respiration.
E. Whose popular name is breathing?
I. Yes. The act of inhaling air, is called inspiration; that of sending it out, expiration. Its organs are the lungs and windpipe. The apparatus employed in the mechanism of breathing is very complex. The windpipe extends from the mouth to the lungs. ”

“ A rude apparatus to illustrate the mechanism of breathing in mammals is easily made by suspending the lungs of some small animal in a glass bell-jar closed below by an elastic membrane—a sheet of rubber, for instance—the only access for air to the interior being through the windpipe. Then the forced enlargement of the cavity, by pulling down the membrane, causes the inflation of the lungs. ”

“ Roughly speaking, lower breathing is accomplished by distention of the abdominal part of the apparatus, middle breathing by distention of the part of the body between the ribs, upper breathing by inflation of the chest. In what we call a long breath, and in a yawn, the breathing is complete throughout the whole of the lungs. It is this which is worth cultivation, not only for the sake of the lungs themselves, but for the sake of the control of breathing which is often useful. ”

“ WONDERS OF RESPIRATION.—The perfection of the organs of respiration challenges our admiration. So delicate are they that the least pressure would cause exquisite pain, yet tons of air surge to and fro through their intricate passages, and bathe their innermost cells. We yearly perform at least seven million acts of breathing, inhaling one hundred thousand cubic feet of air, and purifying over three thousand five hundred tons of blood. This gigantic process goes on constantly, never wearies or worries us, and we wonder at it only when science reveals to us its magnitude. ”

“ In this case after a time the pulmonary capillaries, like the cutaneous ones, act with increased energy; the breathing, which was before quick, and the air thrown out at each respiration in less quantity, and cool to the back of the hand opposed to it, now becomes larger in quantity, and warmer than natural; which however is not accompanied with the sensation of heat in the membrane, which lines the air-vessels of the lungs, as in the skin. ”

“ Simple diffusion through the narrow bronchial tubes could not possibly bring oxygen into the lung sacs fast enough to supply the requirements of the blood flowing through their walls. The situation is met by active lung ventilation; that is, by forcibly changing the air in the lungs at frequent intervals. The way in which this is done is, as we all know, by breathing. Breathing is nothing but a bellows movement of the chest by which air is alternately expelled and allowed to enter. ”

“ Thus the greater muscular effort in ordinary breathing is used to enlarge the cavity of the thorax or chest, producing inspiration—not, as in birds, to diminish the cavity, producing expiration. In other words, the air is forced into mammalian lungs by atmospheric pressure when, through muscular effort, the chest enlarges; and the air is expelled simply by the elastic reaction of the lungs and chest. ”

“ The impulse which comes from within, from the so-called respiratory centers, so excites the respiratory muscles that they cause the chest to execute the strongest breathing movements with the greatest ease, ventilating every portion of the lungs, filling every air-cell to its utmost capacity. ”

“ Fig. 1, A pair of bellows with two separate bags, so contrived that by opening them, when applied to the nostrils or mouth of a patient, one bag will be filled with common air, and the other with the mephitic air extracted from the lungs; and, by shutting them again, pure atmospheric air will be introduced into those organs, and that drawn out, consequently discharged into the room. Thus, the artificial breathing may be continued, while the other operations on the surface of the body are carried on ”

“ When all the ingoing impulses from the lungs, etc., are cut off, if respiration does not actually cease, it is carried out in a way so ineffective that life cannot be long sustained. It follows that as the muscular contractions necessary for the chest and other respiratory movements are dependent on the impulses passing in from the lungs, etc., breathing belongs to the class of movements known as reflex—chiefly so, at all events. ”

“ When the bellows are set in action, one of the bags receives a column of atmospheric air through its valve; while the other, by means of its flexible tube and its valve, extracts a portion of air from the lungs. But, if the bellows are again shut, one of the bags parts with the impure gas drawn out of the pulmonary vessels; and the second conveys pure atmospheric air to the organs of respiration. By properly repeating this alternate process, the patient may again be enabled to exercise the important function of breathing. ”

“ In ordinary breathing the emission of air immediately follows the intake; expiration begins the moment inspiration ceases, and the respiration is completed. The elasticity of the lungs causes the diaphragm to rise and the walls of the chest to return to their natural position. ”

“ If the breathing has ceased, or nearly so, it must be stimulated by pressure of the chest with the hands, in imitation of the natural breathing, forcibly expelling the air from the lungs, and allowing it to reënter and expand them to the full capacity of the chest. ”

“ Breathing, then, means that we enlarge the chest by the action of certain muscles, that the pressure of air in the lungs becomes reduced as compared with that outside, and that in consequence air rushes into the lungs through the windpipe until an equality of air-pressure inside and outside the lungs is produced. ”

“ Air as important as Food.—​The quality of the blood depends almost as much on the air we breathe as on the food we eat; in the course of every two or three minutes, all the blood in the body passes through the endless ramifications of the lungs, for no other purpose than that, during the instant of its passage, it should be acted upon by the oxygen contained in the air which is drawn into the lungs in the act of breathing. ”

“ The intaking of air is termed by physiologists inspiration, and its expulsion expiration, the whole process being respiration. Expiration takes a very little longer than inspiration, and the rapidity of respiration depends on the needs of the body. The more active the exercise, the more rapidly vital processes go on, the more ventilation of the tissues is required and the more is actually effected. When one is at rest breathing takes place at the rate of from 14 to 18 inspirations and expirations in the minute ”

“ I think it certain that Respiration does always communicate to the Blood some Parts from the Air: Which is proved from this Observation, that the same Quantity of Air will not suffice long for breathing, though it be deprived of none of those Qualities, by which it is fitted to inflate the Lungs and agitate the Blood, the Uses commonly ascribed to it. ”

“ When you are running and breathing hard, and even when you are sitting still and breathing quietly, air is going into your lungs and then coming out, going in and coming out, many times every minute. How does the air get in and out of the lungs? It will not run in of itself; for it is light and floats about, you know. Here, again, Mother Nature has planned it all out. She has made us an air bellows, or air pump, to suck it into the lungs. ”

“ Let another person press upon the projecting part of the neck, called “Adam’s apple,” while air is introduced into the lungs through the bellows. Then press upon the chest, to force the air from the lungs, to imitate natural breathing. ”

“ Breathing is a reflex or involuntary act. The respiratory centre, consisting of an expiratory and inspiratory division, is situated in the bulb, or medulla oblongata, the portion of the brain just above the spinal cord. All the ingoing nervous impulses affect respiration through the outgoing impulses that pass along the nerves to the muscles; that is, the ingoing impulses pass up by the nerves from the lungs to the centre, and thence along other nerves to the respiratory muscles. ”

“ By the muscular action of the diaphragm and intercostal muscles, and the consequent contractions and expansion of the lungs, the alternate inspirations and expirations are produced which we call breathing. The lungs are not completely filled and emptied by each respiration, and a certain amount of air remains stationary in them. 210Were this air which remains stationary constantly in a particular portion of the lungs, the same without change, we would derive no benefit from that portion of the lungs. ”

“ The lungs in their natural state are charged with a large quantity of impure air; this being a portion of the carbonic acid gas which is formed during respiration, but which, after each expiration, remains lodged in the involved passages of the pulmonary tubes. By breathing hard for a short time, as a person does after violent exercise, this impure air is expelled, and its place is supplied by pure atmospheric air, by which a person will be enabled to hold his breath much longer than without such precaution. ”

“ A definite increase in the volume of the lungs is the consequence of frequent repetition of this supplemental respiration. The air-cells which are as a rule inactive, and which are reserved for cases of excessive respiratory strain, arise from their inaction; their walls, which are usually collapsed, and even stuck together, separate and give entrance to the air which can not find room in the confined space sufficient for ordinary breathing. ”

“ The function of the lungs, wherein the blood dispersed throughout a spongy texture is exposed in immense surface to the air, without loss or leakage other than what properly transpires through the membranes, and the consequent advantage of deep breathing and of fresh clean air,—all this has a practical as well as a theoretical interest. ”

“ Lungs' Respiration.—'The number of respirations is increased at the beginning of the stay, but returns to the normal number after a longer time, and probably the depth of the inspiration is also increased.' This is in accordance with our observations. The greater expansion of the chest, and the frequency with which patients and others volunteer the statement that they can breathe deeper, confirms the opinion that the depth of respiration is increased; more bulk of air being taken in to give to the lungs an equivalent amount of oxygen, greater depth of breathing must needs follow. ”

“ The healthy adult savage and the healthy infant of civilization both breathe in this manner, but civilized man has adopted unnatural methods of living, clothing, etc., and has lost his birthright. And we wish to remind the reader that the Complete Breath does not necessarily call for the complete filling of the lungs at every inhalation. One may inhale the average amount of air, using the Complete Breathing Method and distributing the air inhaled, be the quantity large or small, to all parts of the lungs. ”

“ Watch closely, and if you detect a natural gasp, do not interrupt it, but as the ribs sink, gently press them and deepen the gasp into a long breath. Continue to give this help, until the natural breathing is fully resumed, but do not cease your efforts for fully an hour or longer.
Avoid impatient vertical pushes; the force must be upward and inward. If a 61second person is present, he should pull the end of the tongue of the patient out of a corner of his mouth and hold it there, using his handkerchief or piece of cotton rag. This helps to give the air free passage to and from the lungs. ”

“ Whether the air be admitted into the pleural sac, by an opening made in the side from without, or by an opening in the lung itself, the mechanical principle of the respiratory apparatus will be equally deranged. ”

“ In the room heated by a German stove and consequently where there cannot be a free ventilation, every individual is breathing the identical air that has circulated through the lungs of every other individual in the same place—through the air-cells of the scrofulous, the scorbutic, the asthmatic, the consumptive, &c.—air that is not only deprived of its oxygen, but loaded with animal effluvia of a very questionable character! ”

“ Whilst one person is carrying out artificial respiration in this way, others may, if there be opportunity, busy themselves with applying hot flannels to the body and limbs, and hot bottles to the feet, but no attempt should be made to remove the wet clothing or to give any restoratives by the mouth until natural breathing has recommenced. ”

“ But more wonderful yet is its effect on the disorders of the respiratory organs. Under anything like favorable circumstances the lungs are, indeed, the most curable part of the human body. With every inspiration the balm of pure air can be brought into contact with the thousand times thousand air-cells of the respiratory apparatus, [2] and, as we breathe about twenty times per minute, the panacea can be applied twenty-seven thousand times in twenty-four hours. ”

“ The construction of respirators is extraordinarily varied. One form is illustrated. They must be light, and in order not to obstruct breathing seriously they are often provided with valves—closing during inspiration and opening during exhalation. ”

“ To the bellows correspond the lungs from which the expelled air is forced upwards through the windpipe. The lungs are able to expel air regularly and gently, with no more expense of energy than ordinary breathing requires. But the lungs can also force air out with tremendous power—power enough to carry sound over hundreds of yards. ”

“ Frequency of Respiration.—It is usually estimated that we breathe once during every four beats of the heart, or about eighteen times in a minute. There is, of course, a close relation between the heart and lungs, and whatever modifies the pulse, in like manner affects the breathing. When the action of the heart is hurried, a larger amount of blood is sent to the lungs, and, as the consequence, they must act more rapidly. Occasionally, the heart beats so very forcibly that the lungs cannot keep pace with it, and then we experience a peculiar sense of {130}distress from the want of air. ”