Feasibility and clinical applications of multiple breath wash-out (MBW) testing using sulphur hexafluoride in adults with bronchial asthma
In: Scientific Reports Scientific Reports, Jg. 10 (2020), Heft 1, S. 1-9
Online
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Zugriff:
Ventilation heterogeneity is frequent in bronchial asthma and can be assessed using multiple breath wash-out testing (MBW). Most data is available in paediatric patients and using nitrogen as a tracer gas. We aimed to evaluate sulphur hexafluoride (SF6) MBW in adult asthmatics. Spirometry, whole-body plethysmography, impulse oscillometry and SF6-MBW were prospectively performed. MBW parameters reflecting global (lung clearance index, LCI), acinar (Sacin) and conductive (Scond) ventilation heterogeneity were derived from three consecutive wash-outs. LCI was calculated for the traditional 2.5% and an earlier 5% stopping point that has the potential to reduce wash-out times. 91 asthmatics (66%) and 47 non-asthmatic controls (34%) were included in final analysis. LCI2.5 and LCI5 were higher in asthmatics (p acin and Scond were elevated (p 2.5 and 3.5% for LCI5 in asthmatics. Forty-one asthmatic patients had normal spirometry. ROC analysis revealed an AUC of 0.906 for the differentiation from non-asthmatic controls exceeding diagnostic performance of individual and conventional parameters (AUC = 0.819, p 6-MBW is feasible and reproducible in adult asthmatics. Ventilation heterogeneity is increased as compared to non-asthmatic controls persisting in asthmatic patients with normal spirometry. Diagnostic performance is not affected using an earlier LCI stopping point while reducing wash-out duration considerably.
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Feasibility and clinical applications of multiple breath wash-out (MBW) testing using sulphur hexafluoride in adults with bronchial asthma
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Autor/in / Beteiligte Person: | Lenz, Steffi A. ; Schäfer, Julia ; Schroeter, Michele ; Borggrefe, Martin ; Akin, Ibrahim ; Saur, Joachim ; Trinkmann, Frederik ; Ganslandt, Thomas ; Gradinger, Tobias ; Gawlitza, Joshua |
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Zeitschrift: | Scientific Reports Scientific Reports, Jg. 10 (2020), Heft 1, S. 1-9 |
Veröffentlichung: | Nature Publishing Group UK, 2020 |
Medientyp: | unknown |
ISSN: | 2045-2322 (print) |
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