Chest ACCP Member Benefits
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Guest Access | Sign In via User Name/Password
This Article
Right arrow Full Text (PDF) Free
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 Alert me to new issues of the journal
Right arrow Add to My Personal Article Archive
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Hoevers, J
Right arrow Articles by Loudon, R.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Hoevers, J
Right arrow Articles by Loudon, R.

Chest, Vol 98, 1240-1243, Copyright © 1990 by American College of Chest Physicians

ARTICLES

Measuring crackles

J Hoevers and RG Loudon
University of Cincinnati Medical Center, Pulmonary/Critical Care Medicine.

Crackles heard on auscultation can be represented graphically as a time- amplitude plot of the associated waveform. To assess the relative merits of several measures which might be considered for machine implementation in diagnostic instruments, we compared the reproducibility of those based on the initial voltage deflection which begins a crackle with those based on the largest deflection. The latter group showed less interobserver and less intraobserver variability when the same crackles were measured twice by each of two observers. Crackles from a teaching tape, categorized as fine and coarse, were used in this study. The ability of the various measures tested to distinguish between fine and coarse crackles on an individual basis was assessed and found to favor the measures based on the largest deflection. They showed an average of 9.96 percent incorrectly classified crackles, as opposed to 19.53 percent for the two measures based on the initial deflection.


This article has been cited by other articles:


Home page
 ChestHome page
H. Kiyokawa, M. Greenberg, K. Shirota, and H. Pasterkamp
Auditory Detection of Simulated Crackles in Breath Sounds
Chest, June 1, 2001; 119(6): 1886 - 1892.
[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
Copyright © 1990 by the American College of Chest Physicians.