• D E Pallares, B R Pilarski, J L Rodriguez, and F E Leickly.
• Henry Ford Health System, Division of Allergy and Clinical Immunology, Detroit, Michigan, USA.
• Ann. Allergy Asthma Immunol. 1996 Oct 1; 77 (4): 292-7.

BackgroundNebulization of beta-agonists is preferred as a mode of treatment in moderate to severe asthma. Few studies, however, have compared its use in this population using an ultrasonic versus a jet nebulizer.ObjectiveThe purpose of the study was to compare bronchodilator responses to albuterol between an ultrasonic and a jet nebulizer in moderate to severe asthma.MethodsFifteen stable, moderately to severely asthmatic patients were randomized to receive the ultrasonic or jet nebulizer for 2 weeks. They were then crossed over for an additional 2 weeks. Albuterol was the agent used. The bronchodilator response was measured at baseline, and up to four hours after treatment with each nebulizer. Daily peak flows were then done for 2 weeks.ResultsThe maximal percentage of increase in FEV1 at 30 minutes using the ultrasonic nebulizer was 39.9 +/- 8% (P < 0.001) versus 25.1 +/- 7.6% (P = .005) using the jet nebulizer. There were no other differences between the ultrasonic and the jet nebulizer in FEV1 or FVC during the 4-hour spirometry. During the home trial, the difference in evening PEFR between the jet nebulizer (69.05 +/- 14.9 L/min) and the ultrasonic nebulizer (90.11 +/- 18.7 L/min) was significant (P = .04).ConclusionsIn summary, the ultrasonic and the jet nebulizer produced comparable bronchodilator responses to albuterol in stable moderately to severely asthmatic patients.

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