MARK CLARKE / SCIENCE PHOTO LIBRARY MARK CLARKE / SCIENCE PHOTO LIBRARY
Elderly woman using a mouth inhaler for the treatment of asthmatic attacks. Asthmatic attacks comprise various symptoms such as breathlessness, wheezing, dry cough and a feeling of tightness in the chest. All these symptoms are caused by narrowing of the bronchioles in the lungs and triggered by a variety of stimuli such as infection, pollen and dust. Once the attack has started bronchodilator drugs, such as salbutamol, are inhaled from small pressurised aerosol cans. The patient must exale first and then take in a slow and deep breath releasing the drug at the same time by depressing the canister.
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