Application of ultrasound for muscle assessment in sarcopenia: 2020 SARCUS update
- PMID: 33387359
 - DOI: 10.1007/s41999-020-00433-9
 
Application of ultrasound for muscle assessment in sarcopenia: 2020 SARCUS update
Abstract
Purpose: In 2018, the SARCUS working group published a first article on the standardization of the use of ultrasound to assess muscle. Recommendations were made for patient positioning, system settings and components to be measured. Also, shortcomings in knowledge were mentioned. An important issue that still required standardization was the definition of anatomical landmarks for many muscles.
Methods: A systematic search was performed in Medline, SCOPUS and Web of Sciences looking for all articles describing the use of ultrasound in the assessment of muscle not described in the first recommendations, published from 01/01/2018 until 31/01/2020. All relevant terms used for older people, ultrasound and muscles were used.
Results: For 39 muscles, different approaches for ultrasound assessment were found that likely impact the values measured. Standardized anatomical landmarks and measuring points were proposed for all muscles/muscle groups. Besides the five already known muscle parameters (muscle thickness, cross-section area, pennation angle, fascicle length and echo-intensity), four new parameters are discussed (muscle volume, stiffness, contraction potential and microcirculation). The former SARCUS article recommendations are updated with this new information that includes new muscle groups.
Conclusions: The emerging field of ultrasound assessment of muscle mass only highlights the need for a standardization of measurement technique. In this article, guidelines are updated and broadened to provide standardization instructions for a large number of muscles.
Keywords: Assessment; Muscle; Protocol; SARCUS; Sarcopenia; Ultrasound.
Comment in
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  Ultrasound imaging/measurements for skeletal muscles in sarcopenia: an aide memoire.Eur Geriatr Med. 2021 Apr;12(2):425-426. doi: 10.1007/s41999-021-00461-z. Epub 2021 Feb 11. Eur Geriatr Med. 2021. PMID: 33575882 No abstract available.
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  Application of ultrasound for muscle assessment in sarcopenia: 2020 SARCUS update: reply to the letter to the editor : SARCUS working group on behalf of the Sarcopenia Special Interest Group of the European Geriatric Medicine Society.Eur Geriatr Med. 2021 Apr;12(2):427-428. doi: 10.1007/s41999-021-00462-y. Epub 2021 Feb 17. Eur Geriatr Med. 2021. PMID: 33595779 No abstract available.
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  Comment on: "Application of ultrasound for muscle assessment in sarcopenia: towards standardized measurements" and "Application of ultrasound for muscle assessment in sarcopenia: 2020 SARCUS update".Eur Geriatr Med. 2022 Feb;13(1):305-306. doi: 10.1007/s41999-021-00590-5. Epub 2021 Nov 23. Eur Geriatr Med. 2022. PMID: 34813045 No abstract available.
 
References
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- Cruz-Jentoft AJ et al (2019) Sarcopenia: revised European consensus on definition and diagnosis. Age Ageing 48(1):16–31 - DOI
 
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- Reinders I et al (2016) Muscle quality and myosteatosis: novel associations with mortality risk: the age, gene/environment susceptibility (AGES)-Reykjavik study. Am J Epidemiol 183(1):53–60 - PubMed
 
 
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