The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Correlation between tidal volume measured by spirometry and impedance pneumography
Author:	Seshadri, Krithika
View Online:	njit-etd1994-123 (xi, 110 pages ~ 4.1 MB pdf)
Department:	Biomedical Engineering Committee
Degree:	Master of Science
Program:	Biomedical Engineering
Document Type:	Thesis
Advisory Committee:	Reisman, Stanley S. (Committee chair) Kristol, David S. (Committee member) Findley, Thomas W. (Committee member)
Date:	1994-10
Keywords:	Spirometry. Respiration--Measurement.
Availability:	Unrestricted
Abstract:	In this study, an alternative method, impedance pneumography was used to measure the respiration volume. The respiration volume was measured both by using a conventional spirometer and an impedance pneumograph, and evaluated quantitatively in 17 subjects using linear and nonlinear regression algorithms. Data were collected from 17 normal, healthy subjects during rest and paced breathing conditions. A technique was developed to measure tidal volume by impedance pneumography. The respiration volume measured by the spirometer was correlated with the volume measured by the pneumograph. Different electrode positions and postures were included in the study to determine the position and posture which would yield optimum correlations. Correlations between the tidal volume measured by the spirometer and the tidal volume measured by the pneumograph, the rates of respiration (exhalation and inhalation widths), and the means and standard deviations of the exhalation ranges were computed. Results showed high correlations between the two techniques used. The position of the electrodes played a major role in affecting correlations. It was concluded that the posterior electrode position yielded relatively high correlations for the seated and standing postures and that the lateral position yielded good correlations for the supine posture, but further exploration is necessary to determine other factors which would influence the results.