Local gas transport rate in oscillatory flow in a model human central airways

Gaku Tanaka, Jin Ito, Kotaro Oka, Kazuo Tanishita

Research output: Chapter in Book/Report/Conference proceedingChapter

3 Citations (Scopus)

Abstract

The rate of local axial gas transport in oscillatory flow through a model human central airways was measured to evaluate the gas exchange during high-frequency oscillation. A rigid model of human airways consists of asymmetrical bifurcations up to third generation, of which geometries were determined by the study of Horsfield et. al. (1971). A bolus of CO 2 tracer was injected into the trachea, and effective diffusivities as a function of location in the airways were obtained by CO 2 washout profiles. The rate of increase of effective diffusivity depends on the local flow conditions and differs with branches. The effective diffusivity in the left main bronchus becomes 3 times greater than that in the straight tube, whereas no significant effect is observed in the right main bronchus.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED
Pages179-180
Number of pages2
Volume33
Publication statusPublished - 1996
Externally publishedYes

Fingerprint

Gases
Bifurcation (mathematics)
Geometry

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Tanaka, G., Ito, J., Oka, K., & Tanishita, K. (1996). Local gas transport rate in oscillatory flow in a model human central airways. In American Society of Mechanical Engineers, Bioengineering Division (Publication) BED (Vol. 33, pp. 179-180)

Local gas transport rate in oscillatory flow in a model human central airways. / Tanaka, Gaku; Ito, Jin; Oka, Kotaro; Tanishita, Kazuo.

American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. Vol. 33 1996. p. 179-180.

Research output: Chapter in Book/Report/Conference proceedingChapter

Tanaka, G, Ito, J, Oka, K & Tanishita, K 1996, Local gas transport rate in oscillatory flow in a model human central airways. in American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. vol. 33, pp. 179-180.
Tanaka G, Ito J, Oka K, Tanishita K. Local gas transport rate in oscillatory flow in a model human central airways. In American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. Vol. 33. 1996. p. 179-180
Tanaka, Gaku ; Ito, Jin ; Oka, Kotaro ; Tanishita, Kazuo. / Local gas transport rate in oscillatory flow in a model human central airways. American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. Vol. 33 1996. pp. 179-180
@inbook{e1b0c25772ea471f9bf8ca8e04e32b3f,
title = "Local gas transport rate in oscillatory flow in a model human central airways",
abstract = "The rate of local axial gas transport in oscillatory flow through a model human central airways was measured to evaluate the gas exchange during high-frequency oscillation. A rigid model of human airways consists of asymmetrical bifurcations up to third generation, of which geometries were determined by the study of Horsfield et. al. (1971). A bolus of CO 2 tracer was injected into the trachea, and effective diffusivities as a function of location in the airways were obtained by CO 2 washout profiles. The rate of increase of effective diffusivity depends on the local flow conditions and differs with branches. The effective diffusivity in the left main bronchus becomes 3 times greater than that in the straight tube, whereas no significant effect is observed in the right main bronchus.",
author = "Gaku Tanaka and Jin Ito and Kotaro Oka and Kazuo Tanishita",
year = "1996",
language = "English",
volume = "33",
pages = "179--180",
booktitle = "American Society of Mechanical Engineers, Bioengineering Division (Publication) BED",

}

TY - CHAP

T1 - Local gas transport rate in oscillatory flow in a model human central airways

AU - Tanaka, Gaku

AU - Ito, Jin

AU - Oka, Kotaro

AU - Tanishita, Kazuo

PY - 1996

Y1 - 1996

N2 - The rate of local axial gas transport in oscillatory flow through a model human central airways was measured to evaluate the gas exchange during high-frequency oscillation. A rigid model of human airways consists of asymmetrical bifurcations up to third generation, of which geometries were determined by the study of Horsfield et. al. (1971). A bolus of CO 2 tracer was injected into the trachea, and effective diffusivities as a function of location in the airways were obtained by CO 2 washout profiles. The rate of increase of effective diffusivity depends on the local flow conditions and differs with branches. The effective diffusivity in the left main bronchus becomes 3 times greater than that in the straight tube, whereas no significant effect is observed in the right main bronchus.

AB - The rate of local axial gas transport in oscillatory flow through a model human central airways was measured to evaluate the gas exchange during high-frequency oscillation. A rigid model of human airways consists of asymmetrical bifurcations up to third generation, of which geometries were determined by the study of Horsfield et. al. (1971). A bolus of CO 2 tracer was injected into the trachea, and effective diffusivities as a function of location in the airways were obtained by CO 2 washout profiles. The rate of increase of effective diffusivity depends on the local flow conditions and differs with branches. The effective diffusivity in the left main bronchus becomes 3 times greater than that in the straight tube, whereas no significant effect is observed in the right main bronchus.

UR - http://www.scopus.com/inward/record.url?scp=0030396982&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030396982&partnerID=8YFLogxK

M3 - Chapter

AN - SCOPUS:0030396982

VL - 33

SP - 179

EP - 180

BT - American Society of Mechanical Engineers, Bioengineering Division (Publication) BED

ER -