Bronchial challenge test

Bronchial challenge test
MeSH	D001985
OPS-301 code	1-714
LOINC	65806-2

A bronchial challenge test is a

, will react to lower doses of drug.

Sometimes, to assess the reversibility of a particular condition, a

can be used to distinguish asthma (normal to high DLCO) from COPD (reduced DLCO).

False positives and negatives are possible in the bronchial challenge test. In addition, asthma may be temporary due to an exposure to noxious stimuli or exercise.

The bronchial challenge test is physically demanding, and the results can be affected by muscular weakness or exhaustion. The inhaled drug can stimulate the upper airway sufficiently to cause violent coughing. This can make spirometry difficult or impossible. This test is contraindicated in patients with severe airway obstruction due to the obvious worsening of the obstruction. Also contraindicated by the presence of an aortic aneurysm, as spirometry will increase blood pressure, in proportion to both the patient's effort and the degree of obstruction in the lungs.

References

External links

• "Pulmonary Function Testing". American Thoracic Society. Retrieved 2020-03-18.

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