CHAPTER III

The Lungs and Bronchial Tubes

Meaning of Bronchitis—Symptoms and Treatment-Rem:dies for Infants Pneumonia-Consumption the Great DestroyerAsthma-La Grippe.

COUGH (occurring in Bronchitis, Pneumonia, Consumption or Tuberculosis, Asthma, and Influenza or Grippe).-Cough is a symptom of many disorders. It may be caused by irritation of any part of the breath-ing apparatus, as the nose, throat, windpipe, bronchial tubes, and (in pleurisy and pneumonia) covering membrane of the lung. The irritation which produces cough is commonly due either to congestion of the mucous membrane lining the air passages (in early stage of inflammation of these tissues), or to secretion of mucus or pus blocking them, which occurs in the later stages.

Cough is caused by a sudden, violent expulsion of air from the chest following the drawing in of a deep breath. A loose cough is to be encouraged, as by its. means mucus and other discharge is expelled from the air passages.

A dry cough is seen in the early stages of various respiratory diseases, as bronchitis, pneumonia, pleurisy, consumption, whooping cough, and with irritation

from enlarged tonsils and adenoids (see p. 75) occurring in children.

Irritation produced by inhaling dust, or any irritation existing in the nose, ear, or throat may lead to this variety of cough. The dry cough accomplishes no good, and if continuous and excessive may do harm, and demands medicinal relief.

Bronchitis.-Cough following or accompanying cold in the head and sore throat generally means bronchitis.

The larynx or lower part of the throat ends just below the "Adam's apple" in the windpipe. The windpipe is about four and a half inches long and three-quarters to an inch in diameter, and terminates by dividing into the two bronchial tubes in the upper part of the chest. Each bronchial tube divides and subdivides in turn like the branches of a tree, the branches growing more numerous and smaller and smaller until they finally end in the microscopic air sacs or air cells of the lungs. The bronchial tubes convey air to the air cells, and in the latter the oxygen is absorbed into the blood, and carbonic acid is given up. Bronchitis is an inflammation of the mucous membrane lining these tubes. In cough of an ordinary cold only the mucous membrane of the windpipe and, perhaps, of the larger tubes is inflamed. This is a very mild disorder compared to inflammation of the smaller and more numerous tubes.

In bronchitis, besides the ordinary symptoms of a

severe cold in the head, as sneezing, running of mucus from the nose, sore throat and some hoarseness perhaps, and languor and soreness in the muscles, there is at first a feeling of tightness, pressure, and rawness in the region of the breastbone, with a harsh, dry cough. The coughing causes a strain of the diaphragm (the muscle which forms the floor of the chest), so that there are often pain and soreness along the lower borders of the chest where the diaphragm is attached to the inside of the ribs. After a few days the cough becomes looser, greatly to the patient's comfort, and a mixture of mucus and pus is expectorated. In a healthy adult such a cough is usually not in itself a serious affair, and apart from the discomfort of the first day or two, there is not sufficient disturbance of the general health to interfere with the ordinary pursuits. The temperature is the best guide in such cases; if it is above normal (983° F.) the patient should stay indoors. In infants, young children, enfeebled or elderly people, bronchitis may be a serious matter, and may be followed by pneumonia by extension of the inflammation from the small bronchial tubes into the air sacs of the lungs, and infection with the pneumonia germ. The principal signs of severe attacks of bronchitis are rapid breathing, fever, and rapid pulse.

The normal rate of breathing in adults is seventeen a minute, that is, seventeen inbreaths and seventeen outbreaths. In children of one to five years the normal

rate is about twenty-six breathing movements a minute. In serious cases of bronchitis the rate may be twenty-five to forty in adults, or forty to sixty in children, per minute.

Of course the only exact way of learning the nature of a chest trouble is thorough, careful examination by a physician, for cough, fever, rapid breathing and rapid pulse occur in many other diseases besides bronchitis, particularly pneumonia.

Pneumonia begins suddenly, often with a severe chill, headache, and general pains like grippe. In a few hours cough begins, short and dry, with violent, stabbing pain in one side of the chest, generally near the nipple. The breathing is rapid, with expanding nostrils, the face is anxious and often flushed. The matter coughed up at first is often streaked with blood, and is thick and like jelly. The temperature is often 104°-105° F.

If the disease proceeds favorably, at the end of five, seven, or ten days the temperature, breathing, and pulse become normal suddenly, and the patient rapidly emerges from a state of danger and distress to one of comfort and safety. The sudden onset of pneumonia with chill, agonizing pain in side, rapid breathing, and often delirium with later bloody or rusty-colored, gelatinous expectoration, will then usually serve to distinguish it from bronchitis, but not always.

Whenever, with cough, rapid and difficult breathing occur with rise of temperature (as shown by the ther

mometer) and rapid pulse, the case is serious, and medical advice is urgently demanded.

Treatment of Acute Cough and Bronchitis.-In the case of healthy adults with a cough accompanying an ordinary cold, the treatment is very simple, when there is little fever or disturbance of the general health. The remedies recommended for cold in the head (p. 69) should be taken at first. It is also particularly desirable for the patient to stay in the house, or better in bed, for the first day or two, or until the temperature is normal.

The feeling of tightness and distress in the chest may be relieved by applying a mild mustard paper over the breastbone, or a poultice containing mustard, one part, and flour, three parts, mixed with warm water into a paste and spread between two single thicknesses of cotton cloth about eight inches square. The tincture of iodine painted twice over a similar area forms another convenient application instead of the mustard. If the cough is excessive and troublesome at night the tablets of "ammonium chloride compound with codeine" are convenient. One may be taken every hour or two by an adult, till relieved.

Children suffering from a recent cough and fever should be kept in bed while the temperature is above normal. It is well to give infants at the start a grain of calomel or half a teaspoonful of castor oil, and to children of five to eight years double the dose.

The chest should be rubbed with a liniment com