Abstract
Inhaled salbutamol is well known to be effective in obstructive lung disease in the paediatric age group. However, the individually necessary dose cannot be predicted in a single patient. Two inhalation techniques were compared measuring the concentrations of salbutamol in the bronchial lavage fluid. Forty nine children, age 2 to 73 months, inhaled salbutamol immediately before bronchoscopy, either 200 microg using a metered dose inhaler (MDI) or 2000 microg using a nebulizer (NEB). The concentrations of salbutamol were measured in the bronchial lavage fluid. In spite of different inhaled doses the concentrations of salbutamol were similar in the nebulizer group (n = 29) and the metered dose inhaler group (n = 20) (medians 160 vs. 163 ng/ml; p = 0.27) with a wide range in both groups (12 to 1139 and 5.2 to 641 ng/ml, respectively). In a single patient the concentrations differed by the factor 159 between the right and the left lung. The concentrations of salbutamol were not age dependent (p = 0.06 for NEB, p = 0.28 for MDI). In infants and young children the concentrations of salbutamol in the bronchial lavage fluid vary widely after a single inhalation using either a metered dose inhaler or a nebulizer.
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