Development and evaluation of an improved technique for pulmonary function testing using electrical impedance pneumography intended for the diagnosis of chronic obstructive pulmonary disease patients

Development and evaluation of an improved technique for pulmonary function testing using electrical impedance pneumography intended for the diagnosis of chronic obstructive pulmonary disease patients

Spirometry is regarded as the only effective method for detecting pulmonary function test (PFT) indices. In this study, a novel impedance pulmonary function measurement system (IPFS) is developed for directly assessing PFT indices. IPFS can obtain high resolution values and remove motion artifacts t...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Vol. 13; no. 11; pp. 15846 - 15860
Main Authors: Sim, Myeong Heon, Kim, Min Yong, Jeong, In Cheol, Park, Sung Bin, Yong, Suk Joong, Kim, Won Ky, Yoon, Hyung Ro
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 21-11-2013
Molecular Diversity Preservation International (MDPI)
Subjects:
both hands
Chronic illnesses
Chronic obstructive pulmonary disease
Electric Impedance
Electrodes
Forced Expiratory Volume
Humans
impedance technique
Mortality
Patients
Pulmonary Disease, Chronic Obstructive - diagnosis
pulmonary function test
Respiration
Respiratory Function Tests - methods
Sensors
Spirometry
United States > US
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Summary:Spirometry is regarded as the only effective method for detecting pulmonary function test (PFT) indices. In this study, a novel impedance pulmonary function measurement system (IPFS) is developed for directly assessing PFT indices. IPFS can obtain high resolution values and remove motion artifacts through real-time base impedance feedback. Feedback enables the detection of PFT indices using only both hands for convenience. IPFS showed no differences in the sitting, supine, and standing postures during the measurements, indicating that patient posture has no effect on IPFS. Mean distance analysis showed good agreement between the volume and flow signal of IPFS (p < 0.05). PFT indices were detected in subjects to differentiate a chronic obstructive pulmonary disease (COPD) patient group from a normal group. The forced vital capacity (FVC), forced expiratory volume in the first second (FEV1), FEV1/FVC, and peak expiratory flow (PEF) in the COPD group were lower than those in the normal group by IPFS (p < 0.05). IPFS is therefore suitable for evaluating pulmonary function in normal and COPD patients. Moreover, IPFS could be useful for periodic monitoring of existing patients diagnosed with obstructive lung disease.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s131115846