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Assessment of Intramedullary Spinal Pressure in Small Breed Dogs With Thoracolumbar Disk Extrusion Undergoing Hemilaminectomy.
Vet Surg. 2015 Nov; 44(8):944-8.VS

Abstract

OBJECTIVE

To assess intramedullary spinal pressure (IMP) in small breed dogs with thoracolumbar disk extrusion.

STUDY DESIGN

Prospective cohort study.

ANIMALS

Small breed dogs (n = 14) with thoracolumbar disk extrusion undergoing hemilaminectomy and healthy chondrodystrophic laboratory dogs (control; n = 3) without spinal disease.

METHODS

Diagnosis 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.

RESULTS

Affected 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.

CONCLUSION

Acute thoracolumbar disk extrusion is associated with increased IMP in small breed dogs and surgical decompression results in an immediate decrease of IMP.

Authors+Show Affiliations

Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland.Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland.Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland.Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland.Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland.Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26358818

Citation

Noussitou, Fiammetta L., et al. "Assessment of Intramedullary Spinal Pressure in Small Breed Dogs With Thoracolumbar Disk Extrusion Undergoing Hemilaminectomy." Veterinary Surgery : VS, vol. 44, no. 8, 2015, pp. 944-8.
Noussitou FL, Gorgas D, Rohrbach H, et al. Assessment of Intramedullary Spinal Pressure in Small Breed Dogs With Thoracolumbar Disk Extrusion Undergoing Hemilaminectomy. Vet Surg. 2015;44(8):944-8.
Noussitou, F. L., Gorgas, D., Rohrbach, H., Henke, D., Howard, J., & Forterre, F. (2015). Assessment of Intramedullary Spinal Pressure in Small Breed Dogs With Thoracolumbar Disk Extrusion Undergoing Hemilaminectomy. Veterinary Surgery : VS, 44(8), 944-8. https://doi.org/10.1111/vsu.12399
Noussitou FL, et al. Assessment of Intramedullary Spinal Pressure in Small Breed Dogs With Thoracolumbar Disk Extrusion Undergoing Hemilaminectomy. Vet Surg. 2015;44(8):944-8. PubMed PMID: 26358818.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Assessment of Intramedullary Spinal Pressure in Small Breed Dogs With Thoracolumbar Disk Extrusion Undergoing Hemilaminectomy. AU - Noussitou,Fiammetta L, AU - Gorgas,Daniela, AU - Rohrbach,Helene, AU - Henke,Diana, AU - Howard,Judith, AU - Forterre,Franck, Y1 - 2015/09/10/ PY - 2015/9/12/entrez PY - 2015/9/12/pubmed PY - 2016/7/22/medline SP - 944 EP - 8 JF - Veterinary surgery : VS JO - Vet Surg VL - 44 IS - 8 N2 - OBJECTIVE: To assess intramedullary spinal pressure (IMP) in small breed dogs with thoracolumbar disk extrusion. STUDY DESIGN: Prospective cohort study. ANIMALS: Small breed dogs (n = 14) with thoracolumbar disk extrusion undergoing hemilaminectomy and healthy chondrodystrophic laboratory dogs (control; n = 3) without spinal disease. METHODS: Diagnosis 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. RESULTS: Affected 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. CONCLUSION: Acute thoracolumbar disk extrusion is associated with increased IMP in small breed dogs and surgical decompression results in an immediate decrease of IMP. SN - 1532-950X UR - https://www.unboundmedicine.com/medline/citation/26358818/Assessment_of_Intramedullary_Spinal_Pressure_in_Small_Breed_Dogs_With_Thoracolumbar_Disk_Extrusion_Undergoing_Hemilaminectomy_ L2 - https://doi.org/10.1111/vsu.12399 DB - PRIME DP - Unbound Medicine ER -