I would like to know what is the best way to measure the mechanical properties of the Achilles Tendon with ultrasound and isokinetics?

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Gustavo Miranda Zanotto

Dear Dr. Oliveira,

elastosonography is an simple and non invasive way to measure tendon mechanical properties in vivo.I can send you some papers if you are interested. Not sure if this is any helpful to your project and who could help you with this in Brazil.

Cheers,

Claudio Vergari

Hi Rodrigo,

Incidentally, I wrote a couple of paper on the relation between ultrasound and the elastic properties of tendon :

Article Axial speed of sound is related to tendon's nonlinear elasticity

Article Axial Speed of Sound for the Monitoring of Injured Equine Te...

More recently, a few paper came out on ultrasound shearwave elastography and tendon viscoelasticity, for instance:

Article Viscoelasticity in Achilles Tendonopathy: Quantitative Asses...

Article Continuous Shear Wave Elastography: A New Method to Measure ...

Telmo Firmino

I would consider two different approaches:

1. Computerized “Ultrasound Tissue Characterization” (UTC) consists of both hardware and software. A pivotal role in the configuration plays the UTC-Tracker, a precision instrument that moves the ultrasound probe automatically across the region of interest, e.g. along a tendon’s long axis, collecting transverse images at even distances of 0.2 mm over a length of 12 cm. These images are stored real-time in a high-capacity laptop computer and by compounding contiguous transverse images, a 3-D ultrasound data-block is created that can be used for tomographic visualization and tissue characterization and quantification of architecture and integrity of the collagenous matrix. This allows to identify matrix changes in the tendon.

2. Ultrasound elastography (Shear Wave) is a tool that has enabled measurement of mechanical properties of soft tissue and it can provide an assessment of the viscoelastic properties of the Achilles tendon, but still with some limitations. This might be the best option as it measures tissue stiffness which can be related to the force produced.