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Nonlinear model for offline correction of pulmonary waveform generators.

Authors
Reynolds-JS; Stemple-KJ; Petsko-RA; Ebeling-TR; Frazer-DG
Source
IEEE Trans Biomed Eng 2002 Dec; 49(12)(Pt 2):1567-1573
NIOSHTIC No.
20022351
Abstract
Pulmonary waveform generators consisting of motor-driven piston pumps are frequently used to test respiratory-function equipment such as spirometers and peak expiratory flow (PEF) meters. Gas compression within these generators can produce significant distortion of the output flow-time profile. A nonlinear model of the generator was developed along with a method to compensate for gas compression when testing pulmonary function equipment. The model and correction procedure were tested on an Assess Full Range PEF meter and a Micro DiaryCard PEF meter. The tests were performed using the 26 American Thoracic Society standard flow-time waveforms as the target flow profiles. Without correction, the pump loaded with the higher resistance Assess meter resulted in ten waveforms having a mean square error (MSE) higher than 0.001 L2/s2. Correction of the pump for these ten waveforms resulted in a mean decrease in MSE of 87.0%. When loaded with the Micro DiaryCard meter, the uncorrected pump outputs included six waveforms with MSE higher than 0.001 L2/s2. Pump corrections for these six waveforms resulted in a mean decrease in MSE of 58.4%.
Keywords
Models; Mathematical-models; Respiratory-function-tests; Respiratory-equipment; Pulmonary-function; Pulmonary-function-tests
Contact
Engineering and Controls Technology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505
CODEN
IEBEAX
Publication Date
20021201
Document Type
Journal Article
Email Address
JReynolds@cdc.gov
Fiscal Year
2003
NTIS Accession No.
NTIS Price
Issue of Publication
12
ISSN
0018-9294
NIOSH Division
HELD; DRDS
Priority Area
Disease and Injury: Asthma and Chronic Obstructive Pulmonary Disease
Source Name
IEEE Transactions on Biomedical Engineering
State
WV
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