Sunday 1 November 2020

[www.keralites.net] ASTHMA

 



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Asthma


Asthma is a disease that causes the airways of the lungs to swell and narrow, leading to wheezing, shortness of breath, chest tightness, and coughing.
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Causes

Asthma is caused by inflammation (swelling) in the airways. When an asthma attack occurs, the lining of the air passages swells and the muscles surrounding the airways become tight. This reduces the amount of air that can pass through the airway.
In persons who have sensitive airways, asthma symptoms can be triggered by breathing in substances called allergens or triggers.
Common asthma triggers include:
  • Animals (pet hair or dander)
  • Dust mites
  • Certain medicines (aspirin and other NSAIDS)
  • Changes in weather (most often cold weather)
  • Chemicals in the air or in food
  • Exercise
  • Mold
  • Pollen
  • Respiratory infections, such as the common cold
  • Strong emotions (stress)
  • Tobacco smoke
Many people with asthma have a personal or family history of allergies, such as hay fever (allergic rhinitis) or eczema. Others have no history of allergies.

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Symptoms

Most people with asthma have attacks separated by symptom-free periods. Some people have long-term shortness of breath with episodes of increased shortness of breath. Either wheezing or a cough may be the main symptom.
Asthma attacks can last for minutes to days, and can become dangerous if the airflow is severely blocked.
Symptoms include:
Emergency symptoms that need prompt medical help:
Other symptoms that may occur:
  • Abnormal breathing pattern -- breathing out takes more than twice as long as breathing in
  • Breathing temporarily stops
  • Chest pain
  • Tightness in the chest
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Exams and Tests

The doctor or nurse will use a stethoscope to listen to your lungs. Wheezing or other asthma-related sounds may be heard.
Tests that may be ordered include:

Treatment

The goals of treatment are:
You and your doctor should work as a team to manage your asthma. Follow your doctor's instructions on taking medicines, eliminating asthma triggers, and monitoring symptoms.

MEDICINES FOR ASTHMA 
There are two kinds of medicines for treating asthma:
  • Control medicines to help prevent attacks
  • Quick-relief (rescue) medicines for use during attacks
Long-term Medicines
These are also called maintenance or control medicines. They are used to prevent symptoms in people with moderate to severe asthma. You must take them every day for them to work. Take them even when you feel OK.
Some long-term medicines are breathed in (inhaled), such as steroids and long-acting beta-agonists. Others are taken by mouth (orally). Your doctor will prescribe the right medicine for you.
Quick-relief Medicines
These are also called rescue medicines. They are taken:
  • For coughing, wheezing, trouble breathing, or an asthma attack
  • Just before exercising to help prevent asthma symptoms caused by exercise
Tell your doctor if you are using quick-relief medicines twice a week or more. Your asthma may not be under control and your doctor may need to change your dose of daily control drugs.
Quick-relief medicines include:
  • Short-acting inhaled bronchodilators
  • Oral corticosteroids for when you have an asthma attack that is not going away
A severe asthma attack requires a checkup by a doctor. You may also need a hospital stay. There, you will likely be given oxygen, breathing assistance, and medications given through a vein (IV).

ASTHMA CARE AT HOME
  • Know the asthma symptoms to watch for.
  • Know how to take your peak flow reading and what it means.
  • Know which triggers make your asthma worse and what to do when this happens.
Asthma action plans are written documents for managing asthma. An asthma action plan should include:
  • Instructions for taking asthma medicines when your condition is stable
  • A list of asthma triggers and how to avoid them
  • How to recognize when your asthma is getting worse, and when to call your doctor or nurse
A peak flow meter is a simple device to measure how quickly you can move air out of your lungs.
  • It can help you see if an attack is coming, sometimes even before symptoms appear. Peak flow measurements help let you know when you need to take medicine or other action.
  • Peak flow values of 50% - 80% of your best results are a sign of a moderate asthma attack. Numbers below 50% are a sign of a severe attack.

Outlook (Prognosis)

There is no cure for asthma, although symptoms sometimes improve over time. With proper self-management and medical treatment, most people with asthma can lead normal lives.

Possible Complications

The complications of asthma can be severe, and may include:
  • Death
  • Decreased ability to exercise and take part in other activities
  • Lack of sleep due to nighttime symptoms
  • Permanent changes in the function of the lungs
  • Persistent cough
  • Trouble breathing that requires breathing assistance (ventilator)

When to Contact a Medical Professional

Call for an appointment with your health care provider if asthma symptoms develop.
Call your health care provider or go to the emergency room if:
  • An asthma attack requires more medicine than recommended
  • Symptoms get worse or do not improve with treatment
  • You have shortness of breath while talking
  • Your peak flow measurement is 50% - 80% of your personal best
Go to the emergency room if these symptoms occur:
  • Drowsiness or confusion
  • Severe shortness of breath at rest
  • A peak flow measurement of less than 50% of your personal best
  • Severe chest pain
  • Bluish color to the lips and face
  • Extreme difficulty breathing
  • Rapid pulse
  • Severe anxiety due to shortness of breath

Prevention

You can reduce asthma symptoms by avoiding triggers and substances that irritate the airways.
  • Cover bedding with allergy-proof casings to reduce exposure to dust mites.
  • Remove carpets from bedrooms and vacuum regularly.
  • Use only unscented detergents and cleaning materials in the home.
  • Keep humidity levels low and fix leaks to reduce the growth of organisms such as mold.
  • Keep the house clean and keep food in containers and out of bedrooms. This helps reduce the possibility of cockroaches. Body parts and droppings from cockroaches can trigger asthma attacks in some people.
  • If a person is allergic to an animal that cannot be removed from the home, the animal should be kept out of the bedroom. Place filtering material over the heating outlets to trap animal dander. Change the filter in furnaces and air conditioners often.
  • Eliminate tobacco smoke from the home. This is the single most important thing a family can do to help someone with asthma. Smoking outside the house is not enough. Family members and visitors who smoke outside carry smoke residue inside on their clothes and hair. This can trigger asthma symptoms. If you smoke, now is a good time to quit.
  • Avoid air pollution, industrial dust, and irritating fumes as much as possible.





    
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