Diagnostic tenoscopy of the carpal sheath with a needle arthroscope in standing sedated horses.
Authors: Miagkoff Ludovic, Bonilla Alvaro G
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Needle Arthroscopy for Carpal Sheath Examination in Standing Horses Miagkoff and Bonilla developed and evaluated a minimally invasive diagnostic approach using a 1.2-mm needle arthroscope to visualise the carpal sheath in standing, sedated horses, comparing the technique against both standard 4-mm arthroscopy in cadaveric limbs and clinical feasibility in six live animals. The needle arthroscope demonstrated excellent manoeuvrability and successfully visualised the proximal carpal sheath in all standing horses when the limb was maintained in flexion using a custom splint, though visualisation of the distal sheath and intertendinous recess was limited compared to conventional arthroscopy—a limitation partially attributable to residual tendon tension in standing animals versus cadaveric specimens. No major complications occurred during the procedure, establishing safety and tolerability for conscious patients. For practitioners, this technique offers a valuable diagnostic option when conventional imaging (radiography, ultrasound, MRI) proves inconclusive or when definitive visualisation is required before committing to treatment, particularly for cases involving subtle soft tissue pathology within the carpal sheath that might otherwise necessitate general anaesthesia or more invasive approaches. The practical trade-off—reduced distal visualisation offset by the ability to perform thorough examination in a standing, lightly sedated horse—widens diagnostic possibilities for lameness investigations with minimal risk.
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Practical Takeaways
- •Needle arthroscopy offers a viable diagnostic alternative for horses with suspected proximal carpal sheath disease when conventional imaging is inconclusive—particularly useful for evaluating flexor tendons and synovial inflammation in the proximal region
- •Standing procedure with sedation eliminates general anesthesia risks and costs, making it accessible for field or clinic use, though expect incomplete visualization of distal sheath and intertendinous spaces
- •Best suited for diagnostic confirmation in horses that haven't responded to traditional imaging; full sheath evaluation may still require standard arthroscopy if distal pathology is suspected
Key Findings
- •A 1.2-mm needle arthroscope successfully visualized proximal carpal sheath structures in 6 of 6 standing sedated horses with excellent maneuverability
- •Distal sheath visualization was absent with needle arthroscope compared to standard 4-mm arthroscope
- •Intertendinous recess visualization was partial in 4 of 6 standing horses due to residual flexor tendon tension, versus complete in cadaveric specimens
- •No major complications occurred during standing needle tenoscopy procedures