RESUMO
A study was made of dogs with Hansen type I thoracolumbar disc extrusions that had been treated by hemilaminectomy and fenestration of the affected disc. Follow-up information was available for 40 dogs undergoing treatment over a five-year period. The follow-up period ranged from 12 to 72 months (mean 34 months). The case details and the results of treatment of these 40 dogs are presented. All dogs were graded according to the degree of neurological dysfunction at the time of initial presentation and at the conclusion of the study period. Twenty-seven dogs (68 per cent) had no detectable signs of neurological dysfunction or thoracolumbar pain at the final assessment and a further eight dogs (20 per cent) had mild ambulatory paraparesis but were regarded by their owners as functional pets. Recurrence of neurological signs consistent with thoracolumbar disc disease was seen in five dogs (13 per cent) and was successfully resolved completely in one of three dogs that were treated.
Assuntos
Doenças do Cão/cirurgia , Disco Intervertebral/cirurgia , Laminectomia/veterinária , Doenças da Coluna Vertebral/veterinária , Vértebras Torácicas/cirurgia , Animais , Doenças do Cão/epidemiologia , Cães , Feminino , Seguimentos , Incidência , Disco Intervertebral/diagnóstico por imagem , Laminectomia/métodos , Masculino , Mielografia/métodos , Mielografia/veterinária , Paresia/etiologia , Paresia/fisiopatologia , Paresia/veterinária , Estudos Retrospectivos , Doenças da Coluna Vertebral/complicações , Doenças da Coluna Vertebral/cirurgia , Vértebras Torácicas/diagnóstico por imagem , Fatores de Tempo , Resultado do TratamentoRESUMO
Asymmetrical neurological signs were noted in 50 dogs presenting with Hansen type I thoracolumbar disc extrusion. Thoracolumbar myelograms and surgical decompression were performed in all cases. Dogs were divided into two groups (acute and chronic) based on the duration of clinical signs prior to presentation to the University of Georgia. Lateralising extradural cord compressive lesions were noted on all myelograms. In the acute group, 35 per cent of the dogs had asymmetrical neurological signs contralateral to the myelographic and surgical lesion, while in the chronic group only 11 per cent had neurological signs contralateral to the lesion. There was found to be no significant difference in frequency of contralateral asymmetrical clinical signs between the two groups (Fischer's exact test; P = 0.095). The high frequency of contralateral signs documents the importance of thoracolumbar myelography for accurate localisation of the disc material before decompressive surgery.