34th Annual Scientific Meeting proceedings

Objectives:

Tenoscopy remains the gold standard modality for assessment of the digital flexor tendon sheath (DFTS). The objectives of this study were: 1) to evaluate the feasibility of nano-tenoscopy of the DFTS from a basisesamoid (BS) and a proximolateral (PL) approaches; 2) to report visualization of intrathecal anatomy; 3) to assess the feasibility of nano tenoscopic-guided palmar/plantar annular ligament (PAL) desmotomy; and 4) to report any iatrogenic trauma.

Methods:

An experimental study evaluating DFTS nano tenoscopy in a standing equine cadaver model was performed using BS and PL approaches, in ten equine cadaver limbs. Visualization of intrathecal anatomy was scored and categorized as poor, partial, or excellent by two ECVS diplomates. Following nano tenoscopy, a nanoscopic-guided PAL desmotomy was performed. Limbs were dissected and examined for completeness of PAL desmotomy and iatrogenic damage. Visualization scores and the time taken to perform nano tenoscopy were compared for both approaches using a Wilcoxon signed-rank test. Ethical approval was obtained (VREC1199).

Results:

Nano tenoscopy of the DFTS in a standing model was feasible from both, BS and PL approaches. Visualization of intrathecal anatomy varied between approaches but overall was excellent within the fetlock canal, with no significant difference between approaches (z=-1.066, p=0.286). Complete PAL desmotomy was achieved in all limbs. Iatrogenic damage was minimal in all limbs.

Conclusions:

Nano tenoscopy of the DFTS in a standing equine cadaver model provided excellent visualization of intrathecal sites where pathology commonly occurs and facilitated complete PAL desmotomy in all limbs with minimal iatrogenic damage.