How can we diagnose asthma and / or allergies ask?
Blood
In the blood, the allergic antibodies against the most common allergens measured. It also looks at the distribution of different types of white blood cells, which sometimes characteristic abnormality.
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Skin Test
The presence of allergy can also be tested with a skin test. A drop of the test substance is applied to the skin, and a scratch in the skin is put. Hereinafter referred to as hereby it is checked whether a swelling and / or redness occurs.
Spirometry
The decrease of the flow rate of the exhaled air, we can measure with lung function examination. So this gives size and number to the severity of airway narrowing. If there is a decrease of the flow rate is measured, we can administer medications that dilate the airway. Then we measure thus a higher flow rate. It is thus the reversibility of airway narrowing down.
The increased irritability of the airways hyperreactivity is called. Also that we can measure with the aid of a histamine or methacholine provocation test. Here we measured the quantity of an inhaled stimulus decreases the flow rate in the respiratory tract and how much it then decreases.
The chronic inflammatory activity can be measured by the amount of NO in the exhaled air to be measured. If this research shows that there is much inflammation in the airways, is a provocation test is often not necessary.
