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Microfenestration using the CUSA Excel ultrasonic aspiration system in chondrodystrophic dogs with thoracolumbar disk extrusion: a descriptive cadaveric and clinical study

OBJECTIVE: To describe an ultrasonic surgical aspirator assisted disk fenestration technique in dogs. STUDY DESIGN: Descriptive cadaveric and prospective clinical study. ANIMALS: Fresh Beagle cadavers (n=5) and 10 chondrodystrophic dogs with thoracolumbar disk extrusion. METHODS: Cadaveric study: Intervertebral disks T12-L2 were fenestrated with the CUSA Excel in 5 Beagle cadavers, and fenestration efficacy assessed by morphologic examination of the completeness of fenestration and size of annulotomy. Clinical study: the affected intervertebral disk was fenestrated in 10 chondrodystrophic dogs treated by hemilaminectomy for thoracolumbar disk disease. Efficacy of fenestration was evaluated. RESULTS: Mean time necessary to perform CUSA assisted fenestration was 8 minutes (range, 5-10 minutes) for each disk in cadavers and patients. In cadaver spines, removal of the nucleus pulposus was complete in 11/15 disks. In 4 disks, remnants of nucleus pulposus material were observed on the contralateral side. Nuclear material was normal in 9/15 disks and showed evidence of chondroid degeneration on histopathologic examination in the 6 disks. Median annulotomy size was 3 mm. Clinically, no signs of early recurrence were observed and all dogs recovered uneventfully. CONCLUSIONS: CUSA assisted fenestration is a safe and efficient method of fenestration for removal of most of the nucleus pulposus through a limited annulotomy

Keywords : Animals,Cadaver,complications,Decompression,Surgical,Dog Diseases,Dogs,Female,instrumentation,Intervertebral Disc,Intervertebral Disc Degeneration,Intervertebral Disc Displacement,Lumbar Vertebrae,Male,methods,Orthopedic Procedures,Osteochondrodysplasias,Patients,Radiology,Recurrence,Spine,surgery,Switzerland,Thoracic Vertebrae,Time,Ultrasonics,Universities,veterinary,, Using,Cusa,Excel,Ultrasonic, harley street knee clinic

Date of Publication : 2011 Jan

Authors : Forterre F;Dickomeit M;Senn D;Gorgas D;Spreng D;

Organisation : Department of Surgery and Radiology, University of Berne, Switzerland. frank.forterre@kkh.unibe.ch

Journal of Publication : Vet Surg

Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/21175695

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