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Ultrasound Tissue Characterization of Human Achilles Tendon by Stability Quantification of Echo Patterns
Published on: September 5, 2025
Changes of Achilles midportion tendon microcirculation after repetitive simultaneous cryotherapy and compression
Karsten Knobloch1, Ruth Grasemann, Michael Jagodzinski
1Trauma Department, Medical School Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany. kknobi@yahoo.com
The American Journal of Sports Medicine
|September 26, 2006
Summary
Cryotherapy and compression via the Cryo/Cuff device favorably impacts Achilles tendon microcirculation. This treatment reduces blood flow and venous pressure while preserving oxygen deep within the tendon.
Area of Science:
- Sports Medicine
- Biomedical Engineering
- Physiology
Background:
- Cryotherapy and compression are recognized for pain reduction and functional improvement.
- Optimal dosage and timing for these interventions remain under investigation.
Purpose of the Study:
- To evaluate the effects of a standardized compression and cryotherapy device (Cryo/Cuff) on midportion Achilles tendon microcirculation.
- To assess microcirculatory changes during intermittent application of the device.
Main Methods:
- A descriptive laboratory study involving 26 healthy subjects (13 male, 13 female).
- Subjects underwent three 10-minute applications of the Cryo/Cuff device, each followed by a 10-minute recovery period.
- Achilles tendon microcirculation parameters were continuously monitored using laser Doppler spectrophotometry.
Main Results:
- Superficial tendon oxygen saturation significantly decreased during cryo-compression but increased substantially during recovery.
- Deep tendon oxygen saturation was preserved, with a slight increase observed.
- Postcapillary venous filling pressures were reduced both superficially and deeply.
- Superficial capillary blood flow significantly decreased during treatment, with a moderate increase during recovery.
- Deep capillary blood flow was substantially reduced during treatment and did not increase during recovery.
Conclusions:
- The Cryo/Cuff device demonstrates beneficial effects on Achilles tendon microcirculation.
- Key effects include decreased superficial capillary blood flow, preserved deep tendon oxygen saturation, and improved venous outflow.
- These findings suggest a potential role for this device in managing Achilles tendon conditions.
