In Vivo Stiffness Assessment of Patellar and Quadriceps Tendons by Strain Ultrasound Elastography

Overview

Journal Biomed Mater Eng

Publisher Sage Publications

Specialty Biomedical Engineering

Date 2021 May 17

PMID 33998528

Citations 2

Authors

Surangika Wadugodapitiya

Makoto Sakamoto

Sayaka Suzuki

Yusuke Morise

Koichi Kobayashi

Affiliations

Soon will be listed here.

Abstract

Background: The patellar and quadriceps tendons are responsible for the extension mechanism of the knee joint and frequently become inflamed during sports. Diagnosis and determination of when an athlete can return to sports following these injuries are usually performed by assessing morphological features and functional outcomes. Nevertheless, mechanical properties are not being assessed.

Objective: To describe the stiffness characteristics of these two tendons over the range of knee flexion and to test the feasibility of using strain ultrasound elastography (SE).

Methods: SE with an acoustic coupler as the reference was performed for nine healthy males. Relative stiffness measurements were obtained using the strain ratio (SR = target tissue strain/reference strain) by placing the knee in five different flexion angles. Lower SR indicates higher relative stiffness.

Results: This study showed reliable measurement with good intra- and inter-rater agreement for SR at 30°. SR of the quadriceps tendon decreases as knee flexion increases, indicating increased relative stiffness. In the patellar tendon, no significant difference was observed between 30° and 60°. Beyond 60°, relative stiffness increased constantly.

Conclusions: SE is a reproducible and feasible tool to monitor relative stiffness of the patellar and quadriceps tendons in routine clinical settings.

Citing Articles

Quantitative evaluation of the biomechanical and viscoelastic properties of the dog patellar tendon in response to neuromuscular blockade at different stifle angles.

Anggoro D, Purba M, Nishida N, Itoh H, Itamoto K, Nemoto Y PLoS One. 2024; 19(1):e0292453.

PMID: 38166027 PMC: 10760779. DOI: 10.1371/journal.pone.0292453.

Influence of the Amount of Change in Quadriceps Tendon Young's Modulus on Amount of Change in Walking Speed before and after Total Knee Arthroplasty.

Ebihara B, Mutsuzaki H, Fukaya T, Iwai K Medicina (Kaunas). 2021; 57(12).

PMID: 34946274 PMC: 8705036. DOI: 10.3390/medicina57121329.

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