This tool estimates the Achilles tendon thickness on ultrasound based on data from a large international database.
Instructions
To estimate normative (median) Achilles tendon thickness with 95% reference interval.
The ultrasound probe should be in a transverse position to the tendon with the ankle in maximum dorsiflexion (see Figure 1). First identify the thickest part of the midportion and insertional region of the tendon in the longitudinal plane. Measure the maximum thickness in the transversal plane (Figure 2).
Example of a thickness measurement in the transversal view of the midportion region of the Achilles tendon.
First, the largest latero-medial width of the tendon is identified (see light blue line).
The largest distance perpendicular to the maximum width is defined as the maximum antero-posterior thickness (see yellow dotted line).
See complete instructions and background information:
https://bjsm.bmj.com/content/bjsports/44/16/1153.full.pdf
(Figure 1)
(Figure 2)
When a patient with symptoms in the Achilles tendon region is examined with ultrasound.
The reference values provided by this calculator are based on patient characteristics which may help you to improve personalised healthcare.
However, not all patients with clinical diagnostic criteria for Achilles tendinopathy have increased Achilles tendon thickness outside the 95% reference interval.
See our full disclaimer below.
Achilles Tendon Thickness Tool
The midportion of the Achilles tendon is marked with light blue colour. This is the region between the upper border of the calcaneus and the myotendinous junction.
The insertional region of the Achilles tendon is marked with the dark blue colour. This is the region between the distal tendon insertion on the calcaneus and the upper border of the calcaneus.
Results:
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Disclaimer
The Achilles Tendon Thickness Tool provided on this website is based on a large international cross-sectional study which has not yet been peer reviewed. Parts of the calculator and web page are subject to change after publication of the article deriving from this study. The tool is designed for informational purposes and is intended for use by individuals seeking to estimate Achilles tendon thickness. It is not a substitute for professional medical advice or consultation.
For Healthcare Professionals: Healthcare professionals who utilize this tool should exercise their clinical judgment when interpreting the results and should not solely rely on the information provided here for diagnostic or treatment decisions. This is consistent with the current international guidelines: Dutch multidisciplinary guideline on Achilles tendinopathy | British Journal of Sports Medicine (bmj.com) and Achilles Pain, Stiffness, and Muscle Power Deficits: Midportion Achilles Tendinopathy Revision 2018 (jospt.org) .
For Consumers (Non-Medical Professionals): Individuals without medical training who use this tool do so at their own risk. Anyone with a medical condition or health concern is strongly advised to seek guidance from a qualified healthcare professional before making any decisions related to their health or initiating any form of treatment.
While we have taken care to develop this tool to meet relevant standards, please be aware that medical knowledge and practices evolve over time. It is essential for medical professionals to consult multiple sources and stay updated with the latest advancements in their field.
The content presented on this website, including text, graphics, and images, is provided for informational purposes only. We do not endorse any specific medical tests, healthcare providers, products, or treatment methods.
Your reliance on the information and content obtained through this website is entirely at your own risk. We disclaim any liability or responsibility for any harm, including injury, that may arise from your use of any product, information, idea, or instruction provided on this website or through the services offered here.
Before making any healthcare decisions or taking any actions based on the results of this tool, we strongly encourage you to consult with a qualified healthcare professional who can provide personalized guidance tailored to your specific medical needs.
By using this Achilles Tendon Thickness Tool, you acknowledge and accept these terms and conditions. If you do not agree with these terms, please refrain from using this tool.
