Medical records of 41 dogs, including 15 small breed dogs (<15 kg) and 26 large breed dogs (>15 kg), with cervical intervertebral disc disease (IVDD) that underwent a hemilaminectomy were reviewed. Dogs were diagnosed using myelography, computed tomography/myelography, or MRI, and dogs were classified as having either Hansen Type I disc extrusion or Hansen Type II disc protrusion located ventrally, ventrolaterally, or laterally within the cervical spinal canal. The most common clinical presentation was ambulatory tetraparesis and/or lameness (44%). The most affected sites for cervical IVDD were between the sixth and seventh cervical vertebrae (C6–C7; 78% of Hansen Type II discs) and C2–C3 (86% of Hansen Type I discs). Treatment was effective in 88% of dogs. Five large breed dogs (12%) did not improve. In dogs with a Hansen Type I disc extrusion, clinical signs improved in 96% of the cases. In dogs with a Hansen Type II disc protrusion, an excellent and good outcome was seen in 47% and 32% of cases, respectively. Outcome was significantly better for small breed dogs and dogs with Hansen Type I disc disease compared with large breed dogs and dogs with Hansen Type II disc disease.
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September/October 2011
Retrospective Studies|
September 01 2011
Effectiveness of Cervical Hemilaminectomy in Canine Hansen Type I and Type II Disc Disease: A Retrospective Study
Oliver Schmied, Dr.med.vet.;
Oliver Schmied, Dr.med.vet.
Clinic for Small Animal Surgery/Neurology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.
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Lorenzo Golini, DVM;
Lorenzo Golini, DVM
Clinic for Small Animal Surgery/Neurology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.
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Frank Steffen, PhD, Dr.med.vet., DECVN
Clinic for Small Animal Surgery/Neurology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.
Correspondence: [email protected] (F.S.)
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J Am Anim Hosp Assoc (2011) 47 (5): 342–350.
Citation
Oliver Schmied, Lorenzo Golini, Frank Steffen; Effectiveness of Cervical Hemilaminectomy in Canine Hansen Type I and Type II Disc Disease: A Retrospective Study. J Am Anim Hosp Assoc 1 September 2011; 47 (5): 342–350. doi: https://doi.org/10.5326/JAAHA-MS-5604
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