PMID: 8964134Mar 1, 1996Paper

Separation of pulmonary disorders with two-dimensional discriminant analysis of crackles

Clinical Physiology
A R SovijärviR Luukkonen

Abstract

Previous studies have indicated that disorders producing crackling lung sounds may be different in terms of the waveform of the crackles or their timing in a respiratory cycle. In this study, we evaluated whether two-dimensional discriminant analysis of crackles has a better ability to separate pulmonary disorders than does a single-dimensional analysis. Cracking sounds of patients with cryptogenic fibrosing alveolitis (n = 10), bronchiectasis (n = 10), COPD (n = 10), heart failure (n = 10) and acute pneumonia (n = 11) and of those recovering from pneumonia (n = 9) have been studied. Variables indicating the timing of crackles during inspiration (beginning and endpoint of crackling) and their waveform (initial deflection width (IDW), two cycle duration (2CD) and largest deflection width (LDW)), were used for the analysis. The discrimination properties of one- and two-dimensional analyses with these variables were compared. The two-dimensional distances between the patient groups were the largest by combining IDW and the end-point of crackling. Cryptogenic fibrosing alveolitis was distinguished from bronchiectasis, COPD, heart failure and acute pneumonia without overlap. The differences between the diseases were illustrated two-...Continue Reading

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Citations

Jul 30, 2005·Journal of Medical Systems·Inan GülerUçman Ergün
Oct 6, 1997·American Journal of Respiratory and Critical Care Medicine·H PasterkampG R Wodicka
Aug 24, 2010·Computers in Biology and Medicine·Mete Yeginer, Yasemin P Kahya
Jun 23, 2009·Computers in Biology and Medicine·Mete Yeginer, Yasemin P Kahya
Nov 21, 2007·Computer Methods and Programs in Biomedicine·Mete Yeginer, Yasemin P Kahya
Nov 18, 2008·Journal of Personality·Richard E ZinbargJonathan M Adler
Sep 13, 2007·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Sangjun ImSang Min Kim
Nov 28, 1997·The British Journal of Psychiatry : the Journal of Mental Science·E KuipersC Hadley
Apr 22, 2006·Journal of Applied Physiology·Steve S KramanHans Pasterkamp

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