Use of an aiming device and computed tomography for assisted debridement of subchondral cystic lesions in the limbs of horses.
Authors: Jackson Michelle A, Ohlerth Stefanie, Fürst Anton E
Journal: Veterinary surgery : VS
Summary
# Editorial Summary Subchondral cystic lesions (SCL) represent a challenging surgical target due to their location within bone and variable orientation relative to the articular surface, making conventional debridement techniques imprecise and potentially damaging to adjacent tissue. Jackson and colleagues evaluated CT imaging combined with a custom aiming device to plan and guide drill placement during surgical debridement in 12 horses presenting with lameness from 14 SCL across various limb locations. The aiming device proved highly effective, achieving optimal entry points in 11 lesions and satisfactory access in the remaining three, whilst enabling complete curettage of all lesions with preservation of surrounding subchondral bone and zero surgical complications; mean operative time was 75 minutes (range 45–115 minutes). At 12-month follow-up, ten of 11 horses showed favourable clinical outcomes, suggesting that CT-guided debridement represents a significant advance over traditional arthroscopic or blind drilling approaches. For practitioners managing horses with confirmed or suspected SCL, this technique may warrant consideration in specialist referral settings, as it substantially improves surgical precision, reduces inadvertent damage to healthy bone architecture, and appears to deliver meaningful functional recovery.
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Practical Takeaways
- •CT-guided debridement with an aiming device offers a precise, reproducible technique for treating subchondral cystic lesions with high success rates and minimal risk of damage to surrounding bone
- •Surgical time is reasonable (average 75 minutes) making this a practical approach for referral centers with CT capability
- •This technique may improve outcomes compared to conventional arthroscopic or blind debridement by ensuring complete lesion curettage and optimal positioning
Key Findings
- •CT-guided debridement with an aiming device achieved optimal entry points in 11 of 14 lesions and satisfactory in 3, with precise debridement and preservation of adjacent subchondral bone in all cases
- •Mean surgical time was 75 minutes (range 45-115 minutes) with no intraoperative complications
- •10 of 11 horses (91%) had favorable outcomes at 12 months postoperatively following CT-guided surgical debridement and rhBMP-2 filling