Outcome of horses with synovial structure involvement following solar foot penetrations in four UK veterinary hospitals: 95 cases.
Authors: Findley J A, Pinchbeck G L, Milner P I, Bladon B M, Boswell J, Mair T S, Suthers J M, Singer E R
Journal: Equine veterinary journal
Summary
# Editorial Summary: Solar Foot Penetrations with Synovial Involvement Solar penetrations involving synovial structures represent a significant welfare and economic challenge in equine practice, yet robust outcome data from the UK population have been lacking until now. Findley and colleagues conducted a retrospective analysis of 95 cases treated across four UK referral hospitals using endoscopic lavage, identifying prognostic factors through multivariable regression modelling to guide clinical decision-making. Survival to discharge occurred in only 56% of cases, with a notably poor prognosis for functional recovery: just 36% returned to pre-injury athletic function. Central frog sulcus penetrations and concurrent distal phalanx involvement emerged as particularly grave indicators, carrying odds ratios of 10 and 32 respectively for euthanasia during hospitalisation; critically, each additional day before referral reduced outcomes by 20%, suggesting that early presentation is among the most modifiable prognostic factors available. For practitioners managing these injuries, the data underscores the necessity of urgent specialist referral, careful consideration of deep structure involvement on imaging, and realistic owner counselling regarding athletic prognosis—particularly in breeds identified as higher-risk for poor functional recovery.
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Practical Takeaways
- •Solar foot penetrations involving synovial structures carry a guarded prognosis for survival and poor prognosis for return to work—manage owner expectations accordingly and discuss euthanasia as a realistic outcome early
- •Immediate referral is critical: each day delayed to presentation worsens both survival and functional recovery outcomes, so advise clients to seek specialist care urgently
- •Central frog sulcus penetrations and those involving the distal phalanx are particularly serious and warrant discussion of euthanasia as a humane option, given the high associated mortality
Key Findings
- •56% of horses with synovial involvement from solar foot penetration survived to discharge, with only 36% returning to pre-injury athletic function
- •Central frog sulcus penetration (OR 10) and distal phalanx involvement (OR 32) significantly increased euthanasia risk during hospitalization
- •Delayed presentation by one additional day increased euthanasia risk by 20% and failure to return to function by 10%
- •Multiple surgeries (OR 5.6) and certain breeds were associated with failure to return to pre-injury athletic function