Assessment of Intramedullary Spinal Pressure in Small Breed Dogs With Thoracolumbar Disk Extrusion Undergoing Hemilaminectomy

作者：Noussitou Fiammetta L; Gorgas Daniela; Rohrbach Helene; Henke Diana; Howard Judith; Forterre Franck^*

来源：Veterinary Surgery, 2015, 44(8): 944-948.

DOI：10.1111/vsu.12399

ObjectiveTo assess intramedullary spinal pressure (IMP) in small breed dogs with thoracolumbar disk extrusion.
Study DesignProspective cohort study.
AnimalsSmall breed dogs (n=14) with thoracolumbar disk extrusion undergoing hemilaminectomy and healthy chondrodystrophic laboratory dogs (control; n=3) without spinal disease.
MethodsDiagnosis was based on clinical and neurological examinations and magnetic resonance imaging (MRI) and was confirmed intraoperatively. A standardized anesthesia protocol and surgical procedure were used to minimize factors that could influence IMP. Intramedullary pressure was measured through a minidurotomy at the site of spinal cord compression using a fiber optic catheter inserted perpendicular to the longitudinal axis of the spinal cord. Measurements were taken after hemilaminectomy and again after removal of extruded disk material.
ResultsAffected dogs had significantly higher IMP compared to control dogs (P=.008) and IMP decreased significantly post-decompression compared with initial values (P<.001). No correlation was found between IMP and neurologic grade, degree of spinal cord compression on MRI, or signal intensity changes on MRI.
ConclusionAcute thoracolumbar disk extrusion is associated with increased IMP in small breed dogs and surgical decompression results in an immediate decrease of IMP.

• 出版日期2015-11