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Vertical displacement of pleura: a new method for bronchospasm evaluation?
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Abstract(s)
Background: Lung ultrasonography has been increasingly recognized has a valuable diagnostic tool. In adult patients with asthma/chronic obstructive pulmonary disease and wheezing, LUS usually presents as an A/nude profile (normal profile, with sliding and A-lines, and without any abnormal findings) or at most reveals a decrease/absence of lung sliding. Therefore, until now simple point-of-care ultrasonography appeared to be unable to assess the severity of airflow limitation.
Case presentation: We report the case of a woman presenting to the emergency department with an asthma exacerbation. Bedside ultrasound showed the usual A/normal profile, but also an associated vertical pleural displacement, probably secondary to hyperinflation and accessory muscle recruitment. We evaluated the described movement with M-mode and established a comparison index between end-inspiration and end-expiration, using the skin as reference. This index showed improvement and complete normalization during treatment.
Conclusions: Pleural vertical displacement appears to be a sonographic alteration associated to bronchospasm and accessory muscle recruitment. It is easily identifiable and measurable on LUS, thus possibly representing a new method to evaluate bronchospasm and monitoring treatment response. Further research is needed to confirm or refute this finding.
Description
Keywords
Asthma/COPD Bronchospasm Diagnostic imaging Emergency medicine Lung ultrasonography Point-of-care ultrasonography
Citation
Martins SR, Nogué R. Vertical displacement of pleura: a new method for bronchospasm evaluation?. Ultrasound J. 2020;12(1):42. doi:10.1186/s13089-020-00184-5
Publisher
Springer