asthma

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작성자슈퍼스타K 조회 7회 작성일 2021-04-04 23:32:35 댓글 0

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Asthma

To license this video for patient education, content marketing or broadcast, visit: https://healthcare.nucleusmedicalmedia.com/contact-nucleus Ref: ANH12078

Asthma is a lung disease that inflames and narrows your airways. Normally, as you inhale, air moves freely through your trachea, or windpipe, then through large tubes, called bronchi, smaller tubes, called the bronchioles, and finally into tiny sacs, called alveoli. Small blood vessels, called capillaries, surround your alveoli.

Oxygen from the air you breathe passes into your capillaries. Then carbon dioxide from your body passes out of your capillaries into your alveoli, so that your lungs can get rid of it when you exhale. Your bronchioles expand when the air is warm, moist, and free of irritants and allergy-causing substances, called allergens. When air is cold or dry, or contains irritants or allergens, your bronchioles contract. If you have asthma, your airways are frequently inflamed and swollen.

Certain substances can cause your inflamed airways to overreact even more, resulting in an asthma attack. Triggers of asthma attacks are slightly different for everyone, but usually include outdoor irritants and allergens such as pollen, smoke, pollution, and cold weather. Indoor irritants and allergens such as mold, pet dander, dust mites, and cockroach droppings. Food allergens such as fish, shellfish, eggs, peanuts, and soy. And conditions such as respiratory infections, stress, strong emotions, and exercise.

The symptoms of an asthma attack include coughing, wheezing, shortness of breath, and tightness in your chest. During an asthma attack, also known as a bronchospasm, the muscles around your airways tighten, and the airway wall becomes more swollen. Your airways also produce thick mucus that narrows them even more, making it hard for you to breathe.

If you have asthma, your doctor may prescribe medications to reduce inflammation in your airways, constriction of the muscles surrounding your airways, or mucus secretion in your airways. During an asthma attack, you may need to use a short-acting rescue medication, called a bronchodilator. This medication causes your airway muscles to relax quickly, and provides symptom relief within minutes.

Since there is no cure for asthma, the goal is to prevent you from having asthma attacks by using long-acting, anti-inflammatory control medications. If you take them every day, they will reduce the inflammation of your airways, making them less sensitive to triggers of asthma attacks.

How does asthma work? - Christopher E. Gaw

View full lesson: http://ed.ted.com/lessons/how-does-asthma-work-christopher-e-gaw

More than 300 million people around the world suffer from asthma, and around 250,000 people die from it each year. But why do people get asthma, and how can this disease be deadly? Christopher E. Gaw describes the main symptoms and treatments of asthma.

Lesson by Christopher E. Gaw, animation by Zedem Media.

What happens during an asthma attack?

This video follows a young man as he suffers an asthma attack. Warning: contains scenes that some viewers may find upsetting.

Courtesy of the Department of Health South Australia

https://www.asthma.org.uk/sign-up/

Like us on Facebook: https://www.facebook.com/AsthmaUK/
Follow us on Twitter: https://twitter.com/asthmauk

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