Temporary successful closed reduction of an atlantoaxial luxation in a horse

An eight year-old Welsh cob gelding (weighing 340 kg) was diagnosed with ventral luxation of the dens axis one day after trauma. Neurological signs included severe ataxia, wide stance and hypalgesia. Under general anaesthesia, closed reduction was achieved by maximum extension of the neck and subsequent manual impact on the ventral aspect of the transverse processes of the axis. A follow-up radiograph confirmed the reduction. Eight days later, re-luxation occurred, and as further attempts at nonsurgical and surgical reduction failed, the horse was euthanatised.

Keywords

Horse - vertebral luxation - reduction - neurology - atlanto-axial joint

• REFERENCES

• 1 Fairfield TB. Pathophysiology and diagnosis of neurological disease. In: Kobluk CN, Ames TR, Geor RJ. (eds). The horse. Disease & Clinical Management, vol 1. Philadelphia: W.B. Saunders; 1995: 452.
• 2 Gilmore DR. Non-surgical management of four cases of atlanto-axial subluxation in the dog. J Am Anim Hosp Assoc 1984; 20: 93-6.
• 3 Mayhew IG. Large Animal Neurology. Philadelphia: Lea & Febiger; 1989: 266.
• 4 McCoy DJ, Shires PK, Beadle R. Ventral approach for stabilization of atlanto-axial subluxation secondary to odontoid fracture in a foal. J Am Vet Med Assoc 1984; 185: 545-9.
• 5 Nixon AJ, Stashak TS. Laminectomy for relief of atlanto-axial subluxation in four horses. J Am Vet Med Assoc 1988; 193: 677-82.
• 6 Slone DE, Bergfeld WA, Walker TL. Surgical decompression for traumatic atlanto-axial subluxation in a weanling filly. J Am Vet Med Assoc 1979; 174: 1234-6.
• 7 Wilson WD, Hughes SJ, Ghoshal NG, McNeel SY. Occipito-atlanto-axial malformation in two non-Arabian horses. J Am Vet Med Assoc 1985; 187: 36-40.