Journal of Applied Physiology Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 59: 1008-1012, 1985;
8750-7587/85 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Brunner, J. X.
Right arrow Articles by Langenstein, H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Brunner, J. X.
Right arrow Articles by Langenstein, H.

Journal of Applied Physiology, Vol 59, Issue 3 1008-1012, Copyright © 1985 by American Physiological Society

ARTICLES

Accurate measurement of N2 volumes during N2 washout requires dynamic adjustment of delay time

J. X. Brunner, G. Wolff, G. Cumming and H. Langenstein

Measurement of respiratory gas composition by a mass spectrometer lags behind the measurement of gas flow. To obtain specific gas volumes (e.g., the N2 volume) by multiplication and integration of concentration and flow, one has to synchronize flow and concentration signals using the delay time (TD) of the gas analyzer. During the N2 washout, however, gas composition changes and causes alterations of TD. This leads to errors of up to 17 and 70% in the measurement of pulmonary volume and series dead space, respectively, in an ideally mixing physical model of the lung. On the basis of Poiseuille's law and exact measurements of the characteristics of the capillary it is possible to adjust the synchronization, which improves the absolute accuracy considerably.


This article has been cited by other articles:


Home page
 ThoraxHome page
P. Latzin, C. Thamrin, and R. Kraemer
Ventilation inhomogeneities assessed by the multibreath washout (MBW) technique
Thorax, February 1, 2008; 63(2): 98 - 99.
[Full Text] [PDF]

Home page
 Am. J. Respir. Crit. Care Med.Home page
N. Beydon, S. D. Davis, E. Lombardi, J. L. Allen, H. G. M. Arets, P. Aurora, H. Bisgaard, G. M. Davis, F. M. Ducharme, H. Eigen, et al.
An Official American Thoracic Society/European Respiratory Society Statement: Pulmonary Function Testing in Preschool Children
Am. J. Respir. Crit. Care Med., June 15, 2007; 175(12): 1304 - 1345.
[Full Text] [PDF]

Home page
 Br J AnaesthHome page
G. Mols, H.-J. Priebe, and J. Guttmann
Alveolar recruitment in acute lung injury
Br. J. Anaesth., February 1, 2006; 96(2): 156 - 166.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. Gronkvist, E. Bergsten, O. Eiken, and P. M. Gustafsson
Inter- and intraregional ventilation inhomogeneity in hypergravity and after pressurization of an anti-G suit
J Appl Physiol, April 1, 2003; 94(4): 1353 - 1364.
[Abstract] [Full Text] [PDF]

Home page
 Eur Respir JHome page
A. Schibler, G.L. Hall, F. Businger, B. Reinmann, J.H. Wildhaber, M. Cernelc, and U. Frey
Measurement of lung volume and ventilation distribution with an ultrasonic flow meter in healthy infants
Eur. Respir. J., October 1, 2002; 20(4): 912 - 918.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. Gronkvist, E. Bergsten, and P. M. Gustafsson
Effects of body posture and tidal volume on inter- and intraregional ventilation distribution in healthy men
J Appl Physiol, February 1, 2002; 92(2): 634 - 642.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
P. M. Gustafsson, O. Eiken, and M. Gronkvist
Effects of hypergravity and anti-G suit pressure on intraregional ventilation distribution during VC breaths
J Appl Physiol, August 1, 2001; 91(2): 637 - 644.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
A. D. Farmery and C. E. W. Hahn
Response-time enhancement of a clinical gas analyzer facilitates measurement of breath-by-breath gas exchange
J Appl Physiol, August 1, 2000; 89(2): 581 - 589.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online