Short-term cast immobilisation is effective in reducing lesion propagation in a surgical model of equine superficial digital flexor tendon injury.
Authors: David F, Cadby J, Bosch G, Brama P, van Weeren R, van Schie H
Journal: Equine veterinary journal
Summary
# Editorial Summary Larger superficial digital flexor tendon (SDFT) injuries carry significantly worse prognoses than smaller lesions, largely because initial lesions tend to expand during the inflammatory phase—a process now recognised to be influenced by biomechanical loading. This controlled study investigated whether immobilising the lower limb could restrict this early lesion propagation, using six young horses with surgically induced SDFT core lesions in both front limbs: one randomly assigned to 10-day cast immobilisation, the other to standard bandaging as a control. Serial ultrasonographic imaging over six weeks combined with final macroscopic sectioning revealed that cast-immobilised tendons showed 19% shorter lesion length and 57% smaller lesion width compared to controls (P<0.0001 and P=0.0002 respectively), with these differences persisting at 42 days post-injury. For practitioners managing acute tendon injuries, these findings suggest that brief early-stage cast application represents a straightforward, economical intervention capable of meaningfully limiting lesion expansion—potentially improving long-term functional recovery and reducing the substantial rehabilitation time required for horses with SDFT damage.
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Practical Takeaways
- •Applying a lower limb cast for 10 days immediately after SDFT injury significantly reduces lesion propagation during the critical inflammatory phase compared to standard bandaging
- •This simple, cost-effective intervention could improve long-term prognosis by limiting initial enlargement of tendon lesions in your patients
- •Consider cast immobilisation as a first-line treatment strategy in the acute phase of SDFT injuries, particularly for larger or more severe lesions with poorer prognosis
Key Findings
- •Cast immobilisation for 10 days reduced lesion length by 19% compared to bandaging alone (6.13 cm vs 7.30 cm, P<0.0001)
- •Cast immobilisation reduced lesion width by 57% compared to control (6.90% vs 10.85% of tendon cross-section, P=0.0002)
- •Macroscopic evaluation at Day 42 confirmed 19% shorter lesion length in cast legs (7.00 cm vs 8.33 cm, P=0.04)
- •Short-term immobilisation during the inflammatory phase effectively limits initial lesion enlargement and may improve prognosis