A novel application of strain sonoelastography can detect changes in Achilles tendon elasticity during isometric contractions of increasing intensity.
Achilles Tendon
/ diagnostic imaging
Adult
Ankle Joint
/ physiology
Biomechanical Phenomena
Cross-Sectional Studies
Elasticity
Elasticity Imaging Techniques
/ methods
Female
Healthy Volunteers
Humans
Isometric Contraction
/ physiology
Male
Muscle Strength Dynamometer
Prospective Studies
Range of Motion, Articular
/ physiology
Young Adult
Achilles tendon
Elasticity
Strain sonoelastography
Journal
Journal of foot and ankle research
ISSN: 1757-1146
Titre abrégé: J Foot Ankle Res
Pays: England
ID NLM: 101471610
Informations de publication
Date de publication:
2019
2019
Historique:
received:
07
11
2018
accepted:
10
05
2019
entrez:
30
5
2019
pubmed:
30
5
2019
medline:
18
12
2019
Statut:
epublish
Résumé
Mechanical and morphological properties of the Achilles tendon are altered in disease and in response to changes in mechanical loading. In the last few years different ultrasound based technologies have been used to detect tendon mechanical properties changes mainly in resting condition. Therefore the aim of this study was to evaluate if strain sonoelastography can identify changes in Achilles tendon elasticity during isometric contractions of increasing intensity. This cross-sectional study enrolled 37 healthy volunteers (19 women) with mean (±SD) age of 27.1 (±7.0) years between January and June 2017. Strain sonoelastography images of the Achilles tendon were acquired during an isometric ramp force (0 kg, 0.5 kg, 1 kg, 2 kg, 5 kg and, 10 kg). An external reference material was used to provide a comparison between the examined tissue and a material of constant elasticity. Friedman test with post hoc pairwise comparison were used to determine the correlation between the difference contraction levels. The median and interquartile range (IQR) values for the strain ratio were 1.61 (1.5-2.9) in a relaxed state and 1.30 (1.07-2.02), 1.00 (0.76-1.66), 0.81 (0.70-1.19), 0.47 (0.39-0.73) and 0.33 (0.28-0.40) for 0.5 kg, 1 kg, 2 kg, 5 kg and 10 kg, respectively revealing increased tendon hardness with increasing contraction intensities. Friedman test revealed significant differences ( Strain sonoelastography can detect changes in Achilles tendon elasticity between different contraction intensities. The results provide an original force-elasticity curve for the Achilles tendon in a healthy, asymptomatic population. The study was approved by the Ethics Committee of Canton Ticino.
Sections du résumé
BACKGROUND
BACKGROUND
Mechanical and morphological properties of the Achilles tendon are altered in disease and in response to changes in mechanical loading. In the last few years different ultrasound based technologies have been used to detect tendon mechanical properties changes mainly in resting condition. Therefore the aim of this study was to evaluate if strain sonoelastography can identify changes in Achilles tendon elasticity during isometric contractions of increasing intensity.
METHODS
METHODS
This cross-sectional study enrolled 37 healthy volunteers (19 women) with mean (±SD) age of 27.1 (±7.0) years between January and June 2017. Strain sonoelastography images of the Achilles tendon were acquired during an isometric ramp force (0 kg, 0.5 kg, 1 kg, 2 kg, 5 kg and, 10 kg). An external reference material was used to provide a comparison between the examined tissue and a material of constant elasticity. Friedman test with post hoc pairwise comparison were used to determine the correlation between the difference contraction levels.
RESULTS
RESULTS
The median and interquartile range (IQR) values for the strain ratio were 1.61 (1.5-2.9) in a relaxed state and 1.30 (1.07-2.02), 1.00 (0.76-1.66), 0.81 (0.70-1.19), 0.47 (0.39-0.73) and 0.33 (0.28-0.40) for 0.5 kg, 1 kg, 2 kg, 5 kg and 10 kg, respectively revealing increased tendon hardness with increasing contraction intensities. Friedman test revealed significant differences (
CONCLUSION
CONCLUSIONS
Strain sonoelastography can detect changes in Achilles tendon elasticity between different contraction intensities. The results provide an original force-elasticity curve for the Achilles tendon in a healthy, asymptomatic population.
TRIAL REGISTRATION
BACKGROUND
The study was approved by the Ethics Committee of Canton Ticino.
Identifiants
pubmed: 31139262
doi: 10.1186/s13047-019-0342-1
pii: 342
pmc: PMC6528184
doi:
Types de publication
Evaluation Study
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
30Déclaration de conflit d'intérêts
Competing interestsThe authors declare that they have no competing interests.
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