Types of Bronchial Asthma

Bronchial asthma arise from spasm (with narrowing ) of the intrapulmonary bronchi.
It is caracterised by wheezing and shortness of breath.
Spasmodic attack of asthma varies in severity,but is usually temporary for short time,then clears up.
The patient is exposed to reccurent attack at varied intervals.

Types of Bronchial Asthma:
1.Extrinsic :
Attack of asthma fallows inhalation of external antigenic substances.
Allergenic substances that can cause asthma attack are:house dust,pollen grains,animal hair and fur,some drugs (aspirin).
2.Intrinsic:
No apparent allergen can be accused.
Intrinsic type differs from extrinsic type by:
-later age of onset
-have more persistent attacks
-less response to bronchodilator drugs.