Correlation structure of end-expiratory volume (EEV) in anesthetized rats with intact upper airway

Author

Zhang, X. ; Bruce, E.

Author_Institution

Center for BME, Kentucky Univ., Lexington, KY, USA

Volume

1

fYear

1999

fDate

1999

Abstract

The correlation structure of end-expiratory volume (EEV) was studied in anesthetized rats with intact airways subjected to lung inflation and deflation. The Hurst exponent H, was estimated from EEV fluctuations using modified dispersional analysis. The authors found that H for EEV was 0.5362±0.0763 (mean±std) and 0.6403±0.0561 (mean±std) with lung inflation and deflation, respectively. Both H were significantly different from those obtained after random shuffling of the original time series. Also H with lung deflation was significantly greater than that with lung inflation (P=0.029). The authors conclude that in rats breathing through the upper airway, a positive long-term correlation is present in EEV that is different between inflation and deflation

Keywords

pneumodynamics; time series; Hurst exponent; anesthetized rats; correlation structure; dispersional analysis; end-expiratory volume; intact upper airway; lung deflation; lung inflation; modified dispersional analysis; time series random shuffling; Fluctuations; Fluid flow measurement; Fractals; Lungs; Pediatrics; Rats; Time series analysis; Volume measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint

Conference_Location

Atlanta, GA

ISSN

1094-687X

Print_ISBN

0-7803-5674-8

Type

conf

DOI

10.1109/IEMBS.1999.802430

Filename

802430