The Science Journal of the American Association for Respiratory Care

2010 OPEN FORUM Abstracts


Megan Hayden, Rachel Lenshyn, Kevin Tucker, Joel Brayfield, Aaron E. Light; Respiratory Therapy, Ozarks Technical Community College, Springfield, MO

INTRODUCTION: The addition of large bore corrugated tubing (tusks) to act as a reservoir on an aerosol mask has been utilized to increase the FiO2 during aerosol delivery. We wanted to determine if the addition of tusks would increase the delivery of aerosol particles during aerosol therapy. METHODS: A bench model was created by adapting an adult intubation manikin (Armstrong Medical Industries, Inc, Lincolnshire, IL) to a Hans-Rudolph series 1101 breathing simulator (Hans Rudolph Inc, Shawnee, KS). A TSI Certifier FA Plus ventilator tester (TSI Inc., Shoreview, MN) was then connected to the simulator to assure accuracy of tidal volumes and inspiratory flowrates. The simulator was set to a Raw of 5 cmH2O/L/sec, compliance of 60 ml/cmH2O, rate of 12, and amplitude adjusted to achieve a VT of 500ml. At the connection between the manikin and simulator an Airlife HEPA filter was placed to collect aerosol particles. The filter was weighed at the start of each run and then a Vixone nebulizer was placed on the manikin’s face using an aerosol mask. The nebulizer was filled with 5ml of a 3% NaCL solution and operated at 8 L/min for 10 min. After 10 min the filter was weighed and recorded. Tusks of 6”, 12” and 18” were then added to each side of the aerosol mask and the procedure was repeated for each length of tubing. This was repeated with three different nebulizers with the sequence of lengths rotating through each nebulizer. Any excess solution was emptied out of the nebulizer and allowed to dry with air going through the nebulizer for 2 min. Data was analyzed using SPSS software. A Kolmogorov-Smirnov test was performed to assess distribution and a paired T-test was used to compare means. A Pvalue of < 0.05 was used for significance RESULTS: The aerosol mask alone showed a mean 0.06 g change in weight, 6” tusk bilaterally had a mean 0.16 g weight change, 12” tusk had a mean 0.21 g change, and 18” tusk had a mean 0.2 g change. When data was analyzed the only statistically different weight changes were between the aerosol mask and all tusk mask setups. There was no difference between the different links of tusks. CONCLUSION: Our findings suggest that the use of tusks inserted into the openings of an aerosol mask increases the aerosol delivery to a patient. Further research needs to be performed to assess the clinical significance of the addition of tusks to an aerosol mask during aerosol medication delivery to patients. Sponsored Research - None