Tenoscopic surgery for treatment of lacerations of the digital flexor tendon sheath.
Authors: Fraser B S L, Bladon B M
Journal: Equine veterinary journal
Summary
# Editorial Summary: Tenoscopic Management of Digital Flexor Tendon Sheath Lacerations Digital flexor tendon sheath (DFTS) lacerations present a common and challenging injury in equine practice, yet evidence-based prognostic indicators have been sparse until recently. Fraser and Bladon retrospectively analysed 39 horses treated with tenoscopic lavage, debridement and repair over three years, stratifying outcomes by injury-to-surgery interval and the extent of structural damage sustained. Treatment initiated within 36 hours of injury yielded substantially better outcomes: 89% of horses (25/28) allowed recovery from anaesthesia returned to their original or intended use, compared to just 40% (2/5) when surgery was delayed beyond 36 hours—a statistically significant difference. The prognosis also varied markedly according to the tissues involved; isolated sheath lacerations with contamination showed the most favourable recovery rate at 94%, whilst injuries compromising both flexor tendons resulted in poor outcomes with 5 of 6 horses euthanased intraoperatively. These findings emphasise that with early, vigorous management of synovial infection through tenoscopic visualisation and appropriate antimicrobial therapy, the extent of collateral tendon damage—rather than sepsis control—becomes the primary limiting factor in returning horses to athletic function, making rapid referral and intervention genuinely prognostically meaningful.
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Practical Takeaways
- •Early tenoscopic intervention within 36 hours of DFTS laceration significantly improves prognosis for return to work; this should be a priority in emergency referral protocols
- •DFTS contamination without tendon damage carries excellent prognosis (94%), but involvement of superficial or deep flexor tendons substantially reduces return-to-work rates
- •Early aggressive management of synovial sepsis with lavage, debridement and systemic antibiotics can preserve athletic function when tendon damage is limited
Key Findings
- •94% of horses with DFTS laceration and contamination alone returned to original use
- •75% of horses with superficial digital flexor tendon laceration achieved full recovery
- •Treatment within 36 hours resulted in 89% return to athletic use versus 40% after 36 hours (P=0.03)
- •Extent of collateral tendon damage is a limiting factor for return to intended use when sepsis is controlled