The major use of chest percussion is to determine
if thoracic lesions are asymmetric or if pneumothorax or pleural effusions are present.
Pleural effusions may be detected if there is an obvious fluid-air interface. This
is best appreciated in standing animals.
Detecting asymmetric resonance gives guidelines
as to which radiographic views to take. The resonance of the chest can be classified
as normal, dull (pleural effusion, consolidated lung) or increased (pneumothorax,
hyperinflated lung). The pitch of the resonant sound is directly related to the amount
of air within the chest.
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