Asthma Types Causes And Treatment

Asthma Types, Causes, and​ Treatment
Asthma can strike at​ any age, half of​ all cases first occur in​ children under age 10; in​ this age group, asthma affects twice as​ many boys as​ girls. it​ is​ one of​ the​ leading causes of​ respiratory illness among children and​ young adults, however, this condition may progress a​ lifetime. Its estimated 17million Americans suffer from asthma.
Asthma is​ a​ reversible lung disease characterized by obstruction or​ narrowing of​ the​ airways, the​ lining of​ the​ airways . it​ may resolve spontaneously or​ with treatment. Its symptoms range from mild wheezing and​ shortness of​ breathe dyspnea to​ lifethreatening respiratory failure. Symptoms may persist between acute episodes.
People with asthma do not have a​ problem inhaling, but rather, a​ problem exhaling. Airways open up during inhalation with the​ lowering of​ the​ diaphragm as​ the​ ribs move out making the​ lungs bigger allowing air to​ move around any obstruction. However, when the​ person exhales, as​ the​ rib cage relaxes the​ diaphragm slides up, preventing the​ air from getting around the​ obstruction.
Extrinsic asthma results from sensitivity to​ specific external allergens. in​ cases in​ which the​ allergen isnt obvious, its referred to​ as​ intrinsic asthma.
Extrinsic asthma usually begins in​ childhood and​ is​ accompanied by other manifestations of​ atopy a​ hereditary disorder marked by the​ tendency to​ develop immediate allergic reactions to​ substances such as​ pollen, food, dander, insect venoms, house dust or​ mold, kapok or​ feather pillows, food additives containing sulfites, or​ similar allergic conditions.

In intrinsic asthma, no external allergen can be identified. Most cases are preceded by a​ severe respiratory infection. Irritants, emotional stress, fatigue, exposure to​ noxious fumes, changes in​ temperature, and​ changes in​ humidity, may aggravate intrinsic asthma attacks. in​ many asthmatics, intrinsic and​ extrinsic asthma coexist.
Several ​Drug​s and​ chemicals may provoke an asthma attack. Examples of​ these substances include aspirin, various nonsteroidal antiinflammatory ​Drug​s, and​ yellow food dye tartrazine. Exercise may also provoke an asthma attack. in​ exerciseinduced asthma, bronchospasm may follow heat and​ moisture loss in​ the​ upper airways.
An asthma attack may begin dramatically, with simultaneous onset of​ many severe symptoms, or​ insidiously, with gradually increasing respiratory distress. it​ typically includes the​ following signs or​ symptoms or​ some conbination of​ them
progressively worsening shortness of​ breath
chest tightness.
During an acute attack, the​ cough sounds tight and​ dry. as​ the​ attack subsides, thick mucus is​ produced except in​ young children, who dont expectorate. Between acute attacks, breath sounds may be normal.
The intensity of​ breath sounds in​ symptomatic asthma is​ typically reduced. a​ prolonged phase of​ forced expiration is​ typical of​ airflow obstruction. Evidence of​ lung hyperinflation use of​ accessory muscles, for​ example is​ particularly common in​ children. Acute attacks may be accompanied by tachycardia, tachypnea, and​ diaphoresis. in​ severe attacks, the​ patient may be unable to​ speak more than a​ few words without pausing for​ breath. Cyanosis a​ bluish or​ purplish tinge to​ the​ skin and​ mucous membranes, confusion, and​ lethargy indicate the​ onset of​ respiratory failure.
Treatment of​ acute asthma aims to​ decrease inflammation, coughing, wheezing, and​ shortness of​ breath, bronchial airway swelling, and​ increase pulmonary ventilation. After an acute episode, treatment focuses on avoiding or​ removing precipitating factors, such as​ environmental allergens or​ irritants.
If asthma is​ caused by a​ particular virus, bacterium, toxin, or​ other foreign substance, it​ may be treated by desensitizing the​ patient through a​ series of​ injections of​ limited amounts of​ the​ antigen causing the​ attack. the​ aim is​ to​ curb the​ patients immune response to​ the​ antigen.
Larry Champlin
Health Clamour
Senior Editor
http//www. healthclamour. com

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