Symptoms And Treatment Of Asthma

1357 WordsSep 19, 20166 Pages
Background Asthma is a perpetual, or long lasting, illness that could potentially be life threating. In the United States of America, about 25 million people are known to have asthma[nhlbi]. About 7 million of the 25 million diagnosed with asthma are children[nhlbi]. Asthma can be described as the inflammation, obstruction and hyperresposiveness of the airway. Asthma might be classified as acute, sub-acute or chronic inflammation of the airway. In asthma, there is a spastic contraction of the smooth muscle in the bronchioles[gyton]. The presence of this airway obstruction causes edema and mucus secretion. When there is an increased sensitivity to irritating stimuli, bronchoconstriction occurs leading to hyperplasia of smooth muscle, hyper secretion and dis-modeling of the epithelium. Anatomy of the Lung The lung is located in the chest as part of the respiratory system. The respiratory systems consists of the trachea, bronchi, lung, mediastinum, pleura and diaphragm. The left lung has two lobes, upper and lower with a cardiac notch(where the heart is sits). The right lung on the other hand has three lopes, upper, middle and lower lobes. The lungs is covered by the chest wall which is made up of muscles and ribs. The mediastinum is the separation between the lungs and the other organs. The diaphragm is the located below the lungs. This is a very thin muscle that provides a division for the chest cavity from the abdomen. The
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