EFFECTS OF EXPERIMENTAL NERVE ROOT COMPRESSION ON ARTERIAL BLOOD FLOW VELOCITY IN THE SEVENTH LUMBAR SPINAL GANGLION OF THE DOG: MEASUREMENT USING INTRAOPERATIVE DOPPLER ULTRASONOGRAPHY |
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| Authors: | Jeryl C Jones DVM PHD Judith A Hudson DVM PhD Donald C Sorjonen DVM MS Charles E Hoffman CVT BS LATG Kyle G Braund BVS MVS PhD James C Wright DVM MS PhD Phillip D Garrett DVM MS Jan E Bartels DVM MS |
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| Institution: | Departments of Radiology (Jones, Hudson, Bartels), Small Animal Medicine and Surgery (Sorjonen), Pathobiology (Wright), Anatomy and Histology (Garrett);and from the Scott-Ritchey Research Center (Hoffman, Braund);College of Veterinary Medicine, Auburn University, AL 36849. |
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| Abstract: | Intraoperative Doppler ultrasonography was used to measure the effects of four experimental nerve root compression treatments (central compression, central-plus-lateral compression, lateral compression, and compression release) on arterial blood flow velocities in the seventh lumbar spinal ganglion of three dogs. Graphed blood flow velocity changes (change = treatment value ? pretreatment value) were below baseline during the first three compression treatments and above baseline following compression release. Mean blood flow velocity changes for both central-plus-lateral compression and lateral compression differed (p ≤ 0.05) from changes for central compression. Changes for central-plus-lateral compression did not differ (p > 0.05) from changes for lateral compression. Changes among the first three compression treatments differed (p ≤ 0.05) from changes for compression release. No histologic abnormalities were identified in compressed nerve tissues, compared to contralateral controls. These findings indicate that stenosis within the L7-S1 intervertebral foramen may cause ischemia of the L7 spinal ganglion in dogs. |
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| Keywords: | canine lumbosacral stenosis spinal ganglion Doppler ultrasonography |
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