Journal of Applied Physiology http://www.adinstruments.com/labchart/faseb
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 66: 2061-2070, 1989;
8750-7587/89 $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
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 Ploysongsang, Y.
Right arrow Articles by Staub, N. C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Ploysongsang, Y.
Right arrow Articles by Staub, N. C.

Journal of Applied Physiology, Vol 66, Issue 5 2061-2070, Copyright © 1989 by American Physiological Society

ARTICLES

Early detection of pulmonary congestion and edema in dogs by using lung sounds

Y. Ploysongsang, R. P. Michel, A. Rossi, L. Zocchi, J. Milic-Emili and N. C. Staub
Department of Internal Medicine, University of Cincinnati, Ohio 45267.

Five mongrel dogs (2 interstitial and 3 alveolar edema) were studied. Lung mechanics were measured by recording the flow, volume, and esophageal pressure according to the standard technique. Edema was produced by infusion of Ringer lactate solution. Lung sounds were recorded on tape from the dependent part of the chest wall. Lung sound signals were high-pass filtered at 100 Hz and subjected to fast Fourier transform. Samples of lung sounds were analyzed before (control) and at 5, 10, 20, 30, and 40 min after the infusion. The mean, median, and mode frequencies of sound power spectra at the control time were, respectively, 169.6 +/- 29.19, 129.6 +/- 29.81, and 136.0 +/- 29.87 (SD) Hz. These values increased significantly at 5 min after infusion to 194.0 +/- 26.08 (P less than 0.0037), 150.2 +/- 23.48 (P less than 0.0085), and 164.6 +/- 28.74 Hz (P less than 0.02), respectively. These values stayed significantly elevated at 10, 20, 30, and 40 min. The pulmonary wedge pressure, lung dynamic compliance, and pulmonary resistance were measured also at the same times. The mean, median, and mode frequencies correlated with pulmonary wedge pressure (P less than 0.00001, P less than 0.0001, P less than 0.0001), lung dynamic compliance (P less than 0.001, P less than 0.0001, P less than 0.0001), and pulmonary resistance (P less than 0.00001, P less than 0.00001, P less than 0.0001), respectively. There were no significant adventitious sounds up to 40 and 50 min after infusion. We concluded that pulmonary congestion and early edema alter the frequency characteristics of lung sounds early, before the occurrence of adventitious sounds. These altered lung sounds may be used as an index of pulmonary congestion and impending edema.


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
P. J. Berger, E. M. Skuza, C. A. Ramsden, and M. H. Wilkinson
Velocity and attenuation of sound in the isolated fetal lung as it is expanded with air
J Appl Physiol, June 1, 2005; 98(6): 2235 - 2241.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
J. Rasanen and N. Gavriely
Detection of porcine oleic acid-induced acute lung injury using pulmonary acoustics
J Appl Physiol, July 1, 2002; 93(1): 51 - 57.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Respir. Crit. Care Med.Home page
H. PASTERKAMP, S. S. KRAMAN, and G. R. WODICKA
Respiratory Sounds . Advances Beyond the Stethoscope
Am. J. Respir. Crit. Care Med., September 1, 1997; 156(3): 974 - 987.
[Full Text] [PDF]


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