Testing limits to airflow perturbation device (APD) measurements |
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| Authors: | Erika R Lopresti Arthur T Johnson Frank C Koh William H Scott Shaya Jamshidi Nischom K Silverman |
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| Institution: | (1) Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA |
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| Abstract: | Background The Airflow Perturbation Device (APD) is a lightweight, portable device that can be used to measure total respiratory resistance
as well as inhalation and exhalation resistances. There is a need to determine limits to the accuracy of APD measurements
for different conditions likely to occur: leaks around the mouthpiece, use of an oronasal mask, and the addition of resistance
in the respiratory system. Also, there is a need for resistance measurements in patients who are ventilated. |
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