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Regional respiratory sound abnormalities in pneumothorax and pleural effusion detected via respiratory sound visualization and quantification: case report

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Abstract

Assessment of respiratory sounds by auscultation with a conventional stethoscope is subjective. We developed a continuous monitoring and visualization system that enables objectively and quantitatively visualizing respiratory sounds. We herein present two cases in which the system showed regional differences in the respiratory sounds. We applied our novel continuous monitoring and visualization system to evaluate respiratory abnormalities in patients with acute chest disorders. Respiratory sounds were continuously recorded to assess regional changes in respiratory sound volumes. Because we used this system as a pilot study, the results were not shown in real time and were retrospectively analyzed. Case 1 An 89-year-old woman was admitted to our hospital for sudden-onset respiratory distress and hypoxia. Chest X-rays revealed left pneumothorax; thus, we drained the thorax. After confirming that the pneumothorax had improved, we attached the continuous monitoring and visualization system. Chest X-rays taken the next day showed exacerbation of the pneumothorax. Visual and quantitative findings showed a decreased respiratory volume in the left lung after 3 h. Case 2 A 94-year-old woman was admitted to our hospital for dyspnea. Chest X-rays showed a large amount of pleural effusion on the right side. The continuous monitoring and visualization system visually and quantitatively revealed a decreased respiratory volume in the lower right lung field compared with that in the lower left lung field. Our newly developed continuous monitoring and visualization system enabled quantitatively and visually detecting regional differences in respiratory sounds in patients with pneumothorax and pleural effusion.

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Acknowledgements

We thank Pioneer Corporation, Nihon Kohden Corporation, and Tokyo Denki University for developing the novel continuous visualization and analysis system used to assess respiratory sounds in this study. We thank Traci Raley, MS, ELS, from Edanz Group (https://en-author-services.edanzgroup.com/ac) for editing a draft of this manuscript.

Funding

This work was supported by the Japan Agency for Medical Research and Development (AMED).

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Authors and Affiliations

  1. Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan

    Kazuya Kikutani, Shinichiro Ohshimo, Takuma Sadamori, Shingo Ohki, Hiroshi Giga, Junki Ishii, Hiromi Miyoshi, Kohei Ota & Nobuaki Shime

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  1. Kazuya Kikutani
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  2. Shinichiro Ohshimo
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  3. Takuma Sadamori
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  4. Shingo Ohki
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  5. Hiroshi Giga
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  6. Junki Ishii
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  7. Hiromi Miyoshi
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  8. Kohei Ota
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  9. Nobuaki Shime
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Contributions

KK collected the patients’ data and drafted the manuscript. SO contributed to the study conception, analyzed the data, and supervised the manuscript drafting. TS contributed to the study conception and constructed the project team. SO, HG, JI and HM collected the patients’ data. NS organized and supervised the entire project. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Shinichiro Ohshimo.

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The authors have no potential conflicts of interest to declare.

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This case report was approved by the institutional ethics committee (Hiroshima University, approval number E-784-4).

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Consent for study participation was obtained from the patients or their closest relatives.

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Written informed consent for publication was obtained from the patients or their closest relatives.

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Kikutani, K., Ohshimo, S., Sadamori, T. et al. Regional respiratory sound abnormalities in pneumothorax and pleural effusion detected via respiratory sound visualization and quantification: case report. J Clin Monit Comput 36, 1761–1766 (2022). https://doi.org/10.1007/s10877-022-00824-2

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  • DOI: https://doi.org/10.1007/s10877-022-00824-2

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