Bronchial challenge: a small reservoir for the Wright jet nebulizer.

A small reservoir for the Wright jet nebulizer was constructed and tested with regard to output and particle size characteristics. The Wright nebulizer has found widespread use for bronchial challenge testing. The new small reservoir delivers an aerosol with a size distribution comparable to that delivered from the standard reservoir. Comparable results were obtained when bronchial challenge with either the small or the standard reservoir was performed in 11 patients. The cost for bronchoconstrictor can be reduced by 50-80% by reducing the volume necessary for challenge. It is documented that calibration of the actual set-up is necessary to control the output from a nebulizer, since the output is, not linearly correlated to the flow.