eprintid: 36564 rev_number: 13 eprint_status: archive userid: 5878 dir: disk0/00/03/65/64 datestamp: 2025-05-15 12:27:05 lastmod: 2025-05-26 17:42:54 status_changed: 2025-05-15 12:27:05 type: article metadata_visibility: show creators_name: Lindner, Simon creators_name: Teichert, Jan creators_name: Hoermann, Clara creators_name: Michels, Julia D. creators_name: Herth, Felix J.F. creators_name: Duerschmied, Daniel creators_name: Britsch, Simone title: Mask Continuous Positive Airway Pressure Increases Diaphragm Thickening Fraction in Healthy Subjects ispublished: pub subjects: ddc-610 divisions: i-61000 divisions: i-910100 divisions: i-950900 keywords: Diaphragm thickening fraction, Ultrasound, Respiratory effort, Non-invasive ventilation, Continuous positive airway pressure note: Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz bzw. Nationallizenz frei zugänglich. *** This publication is freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively abstract: Introduction: The most widespread treatment for obstructive sleep apnoea and obesity hypoventilation syndrome is continuous positive airway pressure (CPAP). The addition of inspiratory support is a potential alternative. This is a physiological study to determine the effect of CPAP and inspiratory support pressure on respiratory effort measured by diaphragm thickening fraction (DTF) in healthy volunteers. Methods: DTF was measured in spontaneously breathing, healthy volunteers during 4 phases: (I) without connection to a ventilator, (II) on a ventilator without any applied pressures, (III) with a CPAP of 5 cmH2O, and (IV) with an additional inspiratory support pressure of 5 cmH2O. Results: Twenty-nine individuals agreed to participate. DTF was similar during the first two phases (32 ± 13% and 35 ± 22%). A considerable increase in DTF to 51 ± 21% was noted in phase III. The introduction of inspiratory support pressure during phase IV led to a reduction in DTF back to 36 ± 23% (p < 0.001). Tidal volume and minute ventilation were both slightly higher in phase IV compared to phase III. Conclusion: CPAP without inspiratory support pressure increases respiratory effort measured by DTF in healthy subjects. Further research is required to investigate this phenomenon in a clinical setting. date: 2024 date_type: published publisher: Karger id_scheme: DOI id_number: 10.11588/heidok.00036564 official_url: https://doi.org/10.1159/000535990 ppn_swb: 192664784X own_urn: urn:nbn:de:bsz:16-heidok-365645 language: eng bibsort: LINDNERSIMMASKCONTIN2024 full_text_status: public publication: Respiration volume: 103 number: 2 place_of_pub: Basel ; Freiburg [u.a.] pagerange: 100-104 pages: 5 issn: 0025-7931 (Druck-Ausg.); 1423-0356 (Online-Ausg.) edition: Zweitveröffentlichung citation: Lindner, Simon ; Teichert, Jan ; Hoermann, Clara ; Michels, Julia D. ; Herth, Felix J.F. ; Duerschmied, Daniel ; Britsch, Simone (2024) Mask Continuous Positive Airway Pressure Increases Diaphragm Thickening Fraction in Healthy Subjects. Respiration, 103 (2). pp. 100-104. ISSN 0025-7931 (Druck-Ausg.); 1423-0356 (Online-Ausg.) document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/36564/1/RES535990.pdf