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Published in: Journal of Cardiothoracic Surgery 1/2021

Open Access 01-12-2021 | Ultrasound | Research article

Most patient conditions do not a priori debilitate the sensitivity of thoracic ultrasound in thoracic surgery-a prospective comparative study

Authors: Thomas Galetin, Julika Merres, Mark Schieren, Benjamin Marks, Yves Haffke, Jerome Defosse, Frank Wappler, Aris Koryllos, Erich Stoelben

Published in: Journal of Cardiothoracic Surgery | Issue 1/2021

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Abstract

Background

The few existing studies on the accuracy of lung ultrasound in the detection of a postoperative pneumothorax after thoracic surgery differ in the sonographic technique and the inclusion criteria. Several conditions are considered unfavourable in the sonographic examination of the lung. We aim to test these conditions for their impact on the diagnostic accuracy of lung ultrasound.

Methods

We compared lung ultrasound and chest roentgenograms for the detection of a pneumothorax after lung-resecting surgery in two prospective trials (register ID DRKS00014557 and DRKS00020216). The ultrasound examiners and radiologists were blinded towards the corresponding findings. We performed posthoc subgroup analyses to determine the influence of various patient or surgery related conditions on the sensitivity and specificity of ultrasound in the detection of pneumothorax.

Results

We performed 340 examinations in 208 patients. The covariates were age, gender, body mass index, smoking status, severity of chronic obstructive pulmonary disease, previous ipsilateral operation or irradiation, thoracotomy, postoperative skin emphysema, indwelling chest tube and X-ray in supine position. In univariate analysis, an indwelling chest-tube was associated with a higher sensitivity (58%, p = 0.04), and a postoperative subcutaneous emphysema with a lower specificity (73% vs. 88%, p = 0.02). None of the other subgroups differed in sensitivity or specificity from the total population .

Conclusions

Most of the patient- or surgery related conditions usually considered unfavourable for lung ultrasound did not impair the sensitivity or specificity of lung ultrasound. Further studies should not excluce patients with these conditions, but test the accuracy under routine conditions.
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Metadata
Title
Most patient conditions do not a priori debilitate the sensitivity of thoracic ultrasound in thoracic surgery-a prospective comparative study
Authors
Thomas Galetin
Julika Merres
Mark Schieren
Benjamin Marks
Yves Haffke
Jerome Defosse
Frank Wappler
Aris Koryllos
Erich Stoelben
Publication date
01-12-2021
Publisher
BioMed Central
Published in
Journal of Cardiothoracic Surgery / Issue 1/2021
Electronic ISSN: 1749-8090
DOI
https://doi.org/10.1186/s13019-021-01454-6

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