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Journal of Foot and Ankle Research
Published in: Journal of Foot and Ankle Research 1/2023

Open Access 01-12-2023 | Achilles Tendinopathy | Review

Elastography in the assessment of the Achilles tendon: a systematic review of measurement properties

Authors: Tiziana Mifsud, Alfred Gatt, Kirill Micallef-Stafrace, Nachiappan Chockalingam, Nat Padhiar

Published in: Journal of Foot and Ankle Research | Issue 1/2023

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Abstract

Background

Managing and rehabilitating Achilles tendinopathy can be difficult, and the results are often unsatisfactory. Currently, clinicians use ultrasonography to diagnose the condition and predict symptom development. However, relying on subjective qualitative findings using ultrasound images alone, which are heavily influenced by the operator, may make it difficult to identify changes within the tendon. New technologies, such as elastography, offer opportunities to quantitatively investigate the mechanical and material properties of the tendon. This review aims to evaluate and synthesise the current literature on the measurement properties of elastography, which can be used to assess tendon pathologies.

Methods

A systematic review was conducted according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. CINAHL, PubMed, Cochrane, Scopus, MEDLINE Complete, and Academic Search Ultimate were searched. Studies assessing the measurement properties concerning reliability, measurement error, validity, and responsiveness of the instruments identified in healthy and patients with Achilles tendinopathy were included. Two independent reviewers assessed the methodological quality using the Consensus-based Standards for the Selection of Health Measurement Instruments methodology.

Results

Out of the 1644 articles identified, 21 were included for the qualitative analysis investigating four different modalities of elastography: axial strain elastography, shear wave elastography, continuous shear wave elastography, and 3D elastography. Axial strain elastography obtained a moderate level of evidence for both validity and reliability. Although shear wave velocity was graded as moderate to high for validity, reliability obtained a very low to moderate grading. Continuous shear wave elastography was graded as having a low level of evidence for reliability and very low for validity. Insufficient data is available to grade three-dimensional shear wave elastography. Evidence on measurement error was indeterminate so evidence could not be graded.

Conclusions

A limited number of studies explored quantitative elastography on Achilles tendinopathy as most evidence was conducted on a healthy population. Based on the identified evidence on the measurement properties of elastography, none of the different types showed superiority for its use in clinical practice. Further high-quality studies with longitudinal design are needed to investigate responsiveness.
Appendix
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Metadata
Title
Elastography in the assessment of the Achilles tendon: a systematic review of measurement properties
Authors
Tiziana Mifsud
Alfred Gatt
Kirill Micallef-Stafrace
Nachiappan Chockalingam
Nat Padhiar
Publication date
01-12-2023
Publisher
BioMed Central
Published in
Journal of Foot and Ankle Research / Issue 1/2023
Electronic ISSN: 1757-1146
DOI
https://doi.org/10.1186/s13047-023-00623-1

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