الفهرس 
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Abstract
The wheezing child is a common clinical paediatric
CD problem- Approximately 20 per cent of children suffer froir
one or more bouts of wheezing during their first 10 years
(2) of life- Children under 2 years of age are especially
prone to wheezing as bronchospasm, mucosal oedema and accumulation of excessive secretions have a relatively
greater obstructive effect on their smaller airways-
(3)
Normal breathing is inaudible because the linear velocity of airflow in the tracheobronchial tree is too slow to produce a sound-
Wheezing is defined as a continuous sound with a
musical quality heard mainly during expiration* It is
(5) frequently associated with expiratory effort* Porgacs
(1967) , stated that wheezing is caused by fast jets of air through airways narrowed to the point of closure* The pitch of the wheeze is largely determined by the linear velocity of this jet of air and is independent of
the calibre and length of the airway*
Wheezing is frequently interpreted as a nonspecific