Causes & Health Information
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Some Basics...
- An asthma attack is an episode of coughing, shortness of breath, or wheezing in people with asthma. During an asthma attack the airways in the lungs get smaller from swelling and inflammation. Asthma medicines help open the airways back up.
- Attacks can be caused by many things. These are called asthma triggers.
- Asthma attacks can be mild, moderate, or severe. Severe asthma attacks are medical emergencies.
- A person with asthma can use a peak flow meter to measure how bad an attack is.
- People should work with a doctor to find ways to control their asthma.
Symptoms
- Chest tightness
- Cough
- Shortness of Breath
- Wheezing: Wheezing is a high-pitched or whistling sound heard while breathing out.
Causes
Many things can cause an asthma attack. These are called asthma triggers.
- Allergens (pollen, house dust, mold, animals)
- Irritants (cigarette smoke, dirt, pollution)
- Exercise
- Respiratory Infections (cold or flu)
- Sudden changes in the weather
Treatment
There are two main types of drugs to help with asthma:
- A Quick-Relief Drug: This drug helps to stop an asthma attack that has already started. It can keep the attack from getting serious. It works fast to open the airways in the lungs during an asthma attack. These drugs should be taken at the first sign of an attack. A doctor may say to take it every day for 1-2 weeks after an attack. Quick-relief drugs are not meant to be used for weeks and weeks. Examples of these drugs are inhaled or nebulized beta-agonists (Proventil, Alupent, Albuterol, Ventolin).
- A Long-Term-Control Drug: This drug keeps asthma attacks from starting. It works slowly over many weeks to stop swelling in the airways. A person must take it every day even when they feel fine and can breathe well. Examples of these drugs are inhaled steroids (Aerobid, Azmacort, Beclovent, Flovent, Pulmicort, Vanceril) and cromolyn.
Asthma Attack Scale
- Mild: No shortness of breath (SOB) at rest and only mild SOB with walking. Able to speak in full sentences. Can lay down flat. GREEN Zone: PEFR 80-100%.
- Moderate: SOB at rest or with walking. Prefers to sit and cannot lie down flat. Able to speak only part of a sentence with taking a breath. Wheezing can be heard. YELLOW Zone: PEFR 50-80%.
- Severe: Very SOB at rest. Speaks in single words. Struggling to breathe. Sitting hunched forward and cannot lie down flat. Wheezing may be loud. RED Zone: PEFR < 50%.
What is a Peak Flow Meter?
A peak flow meter measures how well a person can move air out of his or her lungs. It can measure how severe an asthma attack is. The normal peak expiratory rate (PEFR) for a healthy adult woman is 400-500. The normal PEFR for a healthy adult man is 500-650. During an asthma attack, a person's peak flow rate will go down.
Every person with asthma should learn how to use a peak flow meter. Every person with asthma should also know their own normal peak flow rate.
If a person's PEFR is less than 80% of his or her normal rate, then drugs should be increased. If a person's PEFR is less than 50% of his or her normal rate, he or she should go to the emergency department right away.
Zone | Severity | Peak Flow Meter | Action |
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Green | Mild | PEFR 80-100% of normal rate | Use care advice. |
Yellow | Moderate | PEFR 50-80% of normal rate | Increase asthma drugs. |
Red | Severe | PEFR 0-50% of normal rate | Go to the emergency department right away... |