Individualized mini-hemilaminectomy-corpectomy (iMHC) for treatment of thoracolumbar intervertebral disc herniation in large breed dogs

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Abstract

Objective:

To assess the short-term, mid-term, and long-term results after an individualized mini-hemilaminectomy-corpectomy (iMHC) procedure for treatment of acute and chronic thoracolumbar intervertebral disc disease in non-chondrodystrophic dogs.

Study Design:

Prospective study.

Animals:

Client-owned non-chondrodystrophic large breed dogs (n = 57).

Methods:

The iMHC procedure, combining mini-hemilaminectomy (MH) and partial lateral corpectomy, was performed on non-chondrodystrophic dogs with thoracolumbar disc disease. Neurological status was evaluated before surgery, for short-term outcome on days 1 and 7 after surgery, for mid-term outcome at 6 months after surgery, and for long-term outcome at the conclusion of the study. Prognostic factors were statistically evaluated. P < .05 was considered significant.

Results:

iMHC was performed on 57 dogs, with minimal intraoperative and postoperative complications. Short-term neurological improvement was observed in 85.7% of dogs. Median hospitalization time after surgery was 2 days (range 0-14) and was significantly shorter for dogs with a chronic history of clinical signs (1 day, range 0-5) compared to acute onset (3 days, range 0-14) and for those that were ambulatory at initial presentation (1 day, range 0-5) compared to those that were not (3 days, range 0-14). Long-term evaluation included 53 surgeries with a mean follow-up time of 29.4 months. Outcome was excellent in 19 dogs and good in 29 dogs (90.6% success rate). Excellent mid-term and long-term results were significantly more common in the dogs with only 1 affected disc space.

Conclusion:

The iMHC procedure resulted in a short hospitalization time, minimal postoperative deterioration, and a high success rate.

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