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You are here : AllRefer.com > Health > Diseases & Conditions > Asthma : Pictures & Images

Asthma

Alternate Names : Bronchial asthma, Exercise-induced asthma


Pictures & Images

Lungs
Lungs

The major features of the lungs include the bronchi, the bronchioles and the alveoli. The alveoli are the microscopic blood vessel-lined sacks in which oxygen and carbon dioxide gas are exchanged.

Spirometry
Spirometry

Spirometry is a painless study of air volume and flow rate within the lungs. Spirometry is frequently used to evaluate lung function in people with obstructive or restrictive lung diseases such as asthma or cystic fibrosis.

Asthma
Asthma

Asthma is a disease in which inflammation of the airways causes airflow into and out of the lungs to be restricted. The muscles of the bronchial tree become tight and the lining of the air passages swells, reducing airflow and producing the characteristic wheezing sound. This is known as an asthma attack, which can occur as an allergic reaction to an allergen or other substance (acute asthma), or as a part of a complex disease cycle which may include reaction to stress or exercise (chronic asthma).

Normal versus asthmatic bronchiole
Normal versus asthmatic bronchiole

During an asthma attack smooth muscles located in the bronchioles of the lung constrict and decrease the flow of air in the airways. The amount of air flow can further be decreased by inflammation or excess mucus secretion.

Peak flow meter
Peak flow meter

A peak flow meter is commonly used by a person with asthma to measure the amount of air that can be expelled from the lungs. If the airways become narrow or blocked due to asthma, peak flow values will drop because the person cannot blow air out of the lungs as well. A peak flow meter can be a useful aid in monitoring a person's asthma over time and can also be used to help determine how well a patient's medications are working.

Asthmatic bronchiole and normal bronchiole
Asthmatic bronchiole and normal bronchiole

Asthma is a disease in which inflammation of the airways causes airflow into and out of the lungs to be restricted. When an asthma attack occurs, mucus production is increased, muscles of the bronchial tree become tight, and the lining of the air passages swells, reducing airflow and producing the characteristic wheezing sound.

Common asthma triggers
Common asthma triggers

Many of the same substances that trigger allergies can also trigger asthma. Common allergens include pollen, dust mites, mold and pet dander. Other asthma triggers include irritants like smoke, pollution, fumes, cleaning chemicals, and sprays. Asthma symptoms can be substantially reduced by avoiding exposure to known allergens and respiratory irritants.

Exercise-induced asthma
Exercise-induced asthma

Exercise-induced asthma is distinct from allergic asthma in that it does not produce long-term increase in airway activity. People who only experience asthma when they exercise may be able to control their symptoms with preventive measures such as warm-up and cool-down exercises.

Respiratory system
Respiratory system

Air is breathed in through the nasal passageways, travels through the trachea and bronchi to the lungs.

Spacer use - series
Spacer use - series

Browse through illustrations for Spacer use - series

Metered dose inhaler use - series
Metered dose inhaler use - series

Browse through illustrations for Metered dose inhaler use - series

Nebulizer use - series
Nebulizer use - series

Browse through illustrations for Nebulizer use - series

Peak flow meter use - series
Peak flow meter use - series

Browse through illustrations for Peak flow meter use - series





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