Efficacy of a commercial dry sleeve cryotherapy system for cooling the equine metacarpus.
Authors: Jacobs Carrie C, O'Neil Erin, Prange Timo
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Efficacy of a commercial dry sleeve cryotherapy system for cooling the equine metacarpus Cryotherapy is widely advocated for managing equine soft tissue injuries, yet evidence supporting specific cooling protocols remains limited. Jacobs and colleagues investigated whether the Game Ready Equine system—a commercial dry sleeve device—could achieve therapeutic temperatures in the metacarpal region by implanting thermocouples directly into the subcutaneous tissue and superficial digital flexor tendon (SDFT) of six horses and comparing cryotherapy alone against cryotherapy combined with 5–50 mmHg intermittent compression over 20-minute sessions. Neither treatment reliably reached the target cooling range of 10–19°C; however, adding intermittent compression significantly enhanced thermal penetration, lowering subcutaneous tissue temperatures by approximately 4.9°C and SDFT temperatures by 7.6°C compared to cryotherapy alone, with the SDFT showing a maximum temperature change of 10.2°C when compression was applied. For practitioners using this system, incorporating intermittent compression appears essential to achieve deeper tissue cooling that might support inflammatory management, though the authors highlight that optimal treatment duration, compression intensity, and target temperature thresholds for both healthy and diseased tissues warrant further investigation.
Read the full abstract on PubMed
Practical Takeaways
- •The Game Ready Equine system alone does not reliably cool deep tissues to therapeutic temperatures within 20 minutes—if using this device, always apply intermittent compression for meaningful temperature reduction
- •Even with compression, expect inconsistent penetration to the SDFT; consider longer application times or alternative cooling methods if deeper tendon cooling is your clinical goal
- •This device may be better suited for superficial tissue management than for treating deep flexor tendon injuries; manage client expectations about penetration depth
Key Findings
- •Cryotherapy alone failed to reach target cooling range (10-19°C) in 5 of 6 limbs, achieving only 4.9°C and 7.6°C lower temperatures in subcutaneous tissue and SDFT respectively
- •Addition of intermittent compression (5-50 mmHg) significantly enhanced cooling, producing maximum temperature drops of 7.0°C in subcutaneous tissue and 10.2°C in SDFT (p=0.0001)
- •Compression-augmented cryotherapy achieved target temperature range in only 1 of 6 limbs, questioning the clinical effectiveness of the system as currently used