Respiratory sound energy and its distribution patterns following clinical improvement of congestive heart failure: a pilot study

BMC Emergency Medicine

Research Article

Karen N Gruber¹  Brigitte M Baumann¹  Karen Slutsky¹  Smith Jean²  Zhen Wang³ 

[1] Department of Emergency Medicine, Robert Wood Johnson School of Medicine - University of Medicine and Dentistry of New Jersey - Cooper University Hospital, One Cooper Plaza, 08103, Camden, NJ, USA;Division of Critical Care Medicine, Robert Wood Johnson School of Medicine - University of Medicine and Dentistry of New Jersey - Cooper University Hospital, One Cooper Plaza, 08103, Camden, NJ, USA;Division of Critical Care Medicine, Robert Wood Johnson School of Medicine - University of Medicine and Dentistry of New Jersey - Cooper University Hospital, One Cooper Plaza, 08103, Camden, NJ, USA;Department of Emergency Medicine, Beijing Shi-ji-tan Hospital, 10 Tie Yi Rd., 100038, Beijing, Haidian District, PR China;

关键词: Congestive Heart Failure;    Tidal Volume;    Pulmonary Edema;    Brain Natriuretic Peptide;    Vibration Energy;   

DOI  :  10.1186/1471-227X-10-1

 received in 2009-02-11, accepted in 2010-01-15,  发布年份 2010

来源: Springer

【 摘 要 】

BackgroundAlthough congestive heart failure (CHF) patients typically present with abnormal auscultatory findings on lung examination, respiratory sounds are not normally subjected to additional analysis. The aim of this pilot study was to examine respiratory sound patterns of CHF patients using acoustic-based imaging technology. Lung vibration energy was examined during acute exacerbation and after clinical improvement.MethodsRespiratory sounds throughout the respiratory cycle were captured using an acoustic-based imaging technique. Twenty-three consecutive CHF patients were imaged at the time of presentation to the emergency department and after clinical improvement. Digital images were created (a larger image represents more homogeneously distributed vibration energy of respiratory sound). Geographical area of the images and respiratory sound patterns were quantitatively analyzed. Data from the CHF patients were also compared to healthy volunteers.ResultsThe median (interquartile range) geographical areas of the vibration energy image of acute CHF patients without and with radiographically evident pulmonary edema were 66.9 (9.0) and 64.1(9.0) kilo-pixels, respectively (p < 0.05). After clinical improvement, the geographical area of the vibration energy image of CHF patients without and with radiographically evident pulmonary edema were increased by 18 ± 15% (p < 0.05) and 25 ± 16% (p < 0.05), respectively.ConclusionsWith clinical improvement of acute CHF exacerbations, there was more homogenous distribution of lung vibration energy, as demonstrated by the increased geographical area of the vibration energy image.

【 授权许可】

Unknown   
© Wang et al; licensee BioMed Central Ltd. 2010. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.