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ASTHMA (Gr. avBµa, gasping, whence li...

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Originally appearing in Volume V02, Page 793 of the 1911 Encyclopedia Britannica.
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ASTHMA (Gr. avBµa, gasping, whence lio-Ogaivw, I gasp for breath)  , a disorder of respiration characterized by severe paroxysms of difficult breathing (dyspnoea) usually followed by a See also:period of See also:complete See also:relief, with recurrence of the attacks at more or less frequent intervals . The" See also:term is often loosely employed in reference to states of embarrassed respiration, which are plainly due to permanent organic disease of the See also:respiratory See also:organs (see RESPIRATORY See also:SYSTEM: See also:Pathology) . The attacks occur quite suddenly, and in some patients at See also:regular, in others at irregular intervals . They are characterized by extreme difficulty both in See also:inspiration and expiration, but especially in the latter, the See also:chest becoming distended and the See also:diaphragm immobile . In the See also:case of " pure " idiopathic or " See also:nervous " See also:asthma, there is no See also:fever or other sign of inflammation . But where the asthma is secondary to disease of some See also:organ of the See also:body, the symptoms will depend largely on that organ and the disease See also:present . Such secondary forms may be See also:bronchitis, cardiac, renal, peptic or thymic . The mode of onset differs very markedly in different cases . In some the attack begins quite suddenly and without warning, but in others various sensations well known to the patient announce that an attack is imminent . According to the See also:late Dr See also:Hyde See also:Salter the commonest warning is that of an in-tense See also:desire for See also:sleep, so overpowering that though the patient knows his only See also:chance of warding off the attack is to keep awake, he isyet utterly unable to fight against his drowsiness . Among other patients, however, a See also:condition of unwonted See also:mental• excitement presages the attack . Again the secondary forms of the disease may be ushered in by flatulence, See also:constipation and loss of appetite, and a symptom which often attends the onset, though it is not strictly premonitory, is a profuse diuresis, the urine being watery and nearly colourless, as in the condition of hysterical diuresis .

In the See also:

majority of instances the attack begins during the See also:night, sometimes abruptly but often by degrees . The patient may or may not be aware that his asthma is threatening . A few See also:hours after midnight he is aroused from sleep by a sense of difficult breathing . In some cases this is a . slowly increasing condition, not becoming acute for some See also:hour or more . But in others the attack is so sudden, so severe, that the patient springs from his See also:bed and makes his way at once to an open window, apparently struggling for breath . Most asthmatics have some favourite attitude which best enables them to use all the See also:auxiliary muscles of respiration in their struggle for breath, and this attitude they immediately assume, and guard fixedly until the attack begins to subside . The picture is characteristic and a very painful one to See also:watch . The See also:face is See also:pale, anxious, and it may be livid . The See also:veins of the forehead• stand out, the eyes bulge, and See also:perspiration bedews the face . The See also:head is fixed in position, and likewise the powerful muscles of the back to aid the See also:attempt at respiration . The breath is whistling and wheezing, and if it becomes necessary for the patient to speak, the words are uttered with See also:great difficulty . If the chest be watched it is seen to be almost motionless, and the respirations may become extraordinarily slowed .

Inspiration is difficult as the chest is already over-distended, but expiration is an - even far greater struggle . The attack may last any See also:

time from an hour to several days, and between the attacks the patient is usually quite at ease . But notwithstanding the intensely distressing See also:character of the attacks, asthma is not one of the diseases that shorten See also:life . In the See also:child, asthma is usually periodic in its recurrence, but as he ages it tends to become more erratic in both its manifestations and time ofappearance . Also, though at first it may be strictly " 'Sure " asthma, later in life it becomes attended by chronic bronchitis, which in its turn gives rise to See also:emphysema, As to the underlying cause of the disease, one has only to read the many utterly different theories put forward to See also:account for it, to see how little is really known . But it has now been clearly shown that in the asthmatic See also:state the respiratory centre is in an unstable and excitable condition, and that there is a morbid connexion between this and some See also:part of the nasal apparatus . Dr See also:Alexander See also:Francis has shown, however, that the disease is not directly due to any See also:mechanical obstruction of the nasal passages, and that the See also:nose comparatively rarely supplies the immediate exciting cause of the asthmatic attack . Paroxysmal See also:sneezing is another See also:form in which asthma may show itself, and, curiously enough, this fo m-occurs more frequently in See also:women, asthma of the more recognized type in men . In infants and See also:young See also:children paroxysmal bronchitis is another form of the same disease . Dr See also:James Goodhart notes the connexion between asthma and certain skin troubles, giving cases of the See also:alternation of asthma and See also:psoriasis, and also of asthma and See also:eczema . The disease occurs in families with a well-marked neurotic See also:inheritance, and twice as frequently in men as in women . The immediate cause of an attack may be anything or nothing .

Dr Hyde Salter notes that 8o% of cases in the young date from an attack of whooping cough, bronchitis or See also:

measles . In the See also:general treatment of asthma there are two methods of dealing with the patient, either that of hardening the individual, widening his range of See also:accommodation, and thus making him less susceptible, or that df modifying and adapting the environment to the patient . These two methods correspond to the two methods of See also:drug treatment, tonic or sedative . During the last few years the method of treatment first used by Dr Alexander Francis has come into prominence . His See also:plan is to restore the stability of the respiratory centre, by cauterizing the septal mucous membrane, and combining with this general hygienic See also:measures . In his own words the operation, which is entirely painless and insignificant, is performed as follows:—" After See also:painting one See also:side of the septum See also:nasi with a few drops of See also:cocaine and See also:resorcin, I draw a See also:line with a galvano-cautery point from a spot opposite the See also:middle turbinated body, forwards and slightly downwards for a distance of rather less than See also:half an See also:inch . In about one See also:week's time I repeat the operation on the other side." In his monograph on the subject, he classifies a large number of cases treated in this manner, most of which resulted in complete relief, some in very great improvement, and a very few in slight or no relief .

End of Article: ASTHMA (Gr. avBµa, gasping, whence lio-Ogaivw, I gasp for breath)
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