Diseases mimicking childhood
asthma (differential diagnosis)
Allergic rhinitis and sinusitis.
Obstructions involving large
Foreign body in trachea or
Vocal cord dysfunction.
Vascular rings or laryngeal webs.
stenosis, or bronchostenosis.
Enlarged lymph nodes or tumor.
involving small airways.
Viral bronchiolitis or
not due to asthma.
Aspiration from swallowing
mechanism dysfunction or gastroesophageal reflux.
Recent advances in diagnosis
of childhood asthma:
Impulse osillometery (IOS)
Osillometry is a newer technology that uses small amplitude
pressure oscillations to determine the resistance of the
Nitric Oxide test.
produced in discrete concentrations in the healthy human
airway where it is important in physiological functions such
as maintaining airway patency. NO is over produced in
asthmatic individuals. It is responsible for airway
inflammation (swelling) and is also the product of airway