Abstract
LFTs contribute to the diagnosis of respiratory disease, determining the type of physiological defect, e.g. obstructive, restrictive, bronchial hyperreactivity and the variation in the airways. LFTs most used in children older than 5 years are spirometry, flow-volume curve, bronchial reaction to exercise and metacholine and peak flow. The objective of this paper was to unify the criteria for the practice and interpretation of these tests by a group of 18 specialists from different medical centers where LFTs are performed in children in Chile. We describe for each one the indications, contraindications, the procedure and interpretation of results.
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