Abstract
Background
Studies in mice have suggested that sarcopenic animals may have atrophic diaphragmatic muscles; however, to date, no clinical studies are available.
Aims
To investigate whether the diaphragmatic thickness is affected in older patients with sarcopenia and if this is associated with impaired respiratory functions.
Methods
Thirty sarcopenic and 30 non-sarcopenic elderly patients aged over 65 were included. All patients underwent comprehensive geriatric assessment. The diagnosis of sarcopenia was made according to the criteria of the European Working Group on Sarcopenia in Older People. Ultrasonographic evaluations of the patients were carried out by an experienced radiologist. Diaphragmatic thickness was measured in three positions: end of deep inspiration, quiet breathing, end of forced expiration. Peak expiratory flow (PEF) rate was evaluated by a peak flow meter.
Results
The mean age of the patients was 77 ± 6 years, and 58% were females. Diaphragmatic thickness in three different positions (deep inspiration [2.3 mm (min–max: 1.3–4.1) vs. 2.5 mm (min–max: 1.9–4.9)], quiet breathing [1.8 mm (min–max: 1.0–2.8) vs. 2.00 mm (min–max: 1.3–3.9)] and end of forced expiration [1.1 mm (min–max: 0.7–2.5) vs. 1.5 mm (min–max: 0.5–3.4)]) were found to be thinner in sarcopenic patients compared to non-sarcopenics (p = 0.02, p = 0.02, p < 0.01, respectively). Also, PEF rate results were lower in patients with sarcopenia (245 L/min [min–max: 150–500] vs. 310 L/min [min–max: 220–610], p < 0.01). Diaphragmatic muscle thicknesses in all three positions were independently associated with sarcopenia status of the participants.
Conclusions
Our results suggest that sarcopenia in older people may be associated with reduced diaphragmatic muscle thickness and respiratory functions. Findings are needed to be confirmed in further multicenter studies with big sample sizes.
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OD, BG and MCK equally contributed to the conception and design of the research; OD, SC, NBK, MCP, HDV, SOO equally contributed to the acquisition and analysis of the data; OD, MCK, SOO and BG equally contributed to the interpretation of the data; and OD, MCK, and BG drafted the manuscript. All authors critically revised the manuscript, agree to be fully accountable for ensuring the integrity and accuracy of the work, and read and approved the final manuscript.
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This study was approved by the Ethics in Research Committee of Gazi University School of Medicine.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
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Deniz, O., Coteli, S., Karatoprak, N.B. et al. Diaphragmatic muscle thickness in older people with and without sarcopenia. Aging Clin Exp Res 33, 573–580 (2021). https://doi.org/10.1007/s40520-020-01565-5
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DOI: https://doi.org/10.1007/s40520-020-01565-5