Core decompression of the equine navicular bone: an in vivo study in healthy horses.
Authors: Jenner Florien, Kirker-Head Carl
Journal: Veterinary surgery : VS
Summary
# Editorial Summary Navicular bone pathology in horses frequently involves elevated intraosseous pressure (IOP), which may compromise blood flow and contribute to degenerative changes; Florien and Kirker-Head (2011) investigated whether surgical core decompression could effectively reduce this pressure in healthy equine subjects. Six adult horses underwent arthroscopically-guided drilling of three 2.5-mm channels into the navicular bone, with venous, arterial, articular and intraosseous pressures recorded before surgery and at intervals post-operatively, alongside objective gait analysis, fluorochrome bone labelling, and histological examination at 12 weeks. Core decompression significantly reduced peak IOP immediately after surgery (P<0.05), though this effect diminished by weeks 3 and 6; a meaningful correlation emerged between reduced IOP and bone mineral density, whilst only mild lameness occurred in the first post-operative week with no lasting complications observed. For practitioners considering navicular cases, these findings suggest core decompression can acutely relieve intraosseous pressure and stimulate bone remodelling without adverse effects in the short term, though the progressive return towards baseline pressures warrants consideration of whether single decompression provides durable clinical benefit or whether repeated intervention may prove necessary for longer-term outcomes.
Read the full abstract on PubMed
Practical Takeaways
- •Core decompression may provide short-term pressure relief in navicular bone, but effects appear to diminish over time—may be most useful as adjunctive therapy in acute presentations
- •This surgical approach caused minimal morbidity in healthy horses and was well-tolerated, suggesting safety profile for clinical application
- •The relationship between intraosseous pressure and bone density suggests pressure reduction may preserve or improve bone quality during remodeling
Key Findings
- •Core decompression surgery significantly reduced peak intraosseous pressure (IOP) immediately post-operatively, though effects diminished by 3-6 weeks
- •Significant correlation existed between intraosseous pressure and bone mineral density
- •Horses showed only mild lameness in the first week post-surgery with no adverse effects observed over 12-week period
- •Substantial bone remodeling and neovascularization occurred adjacent to surgical sites within 12 weeks