Original Article - Research
Canine Intervertebral Disc Fenestration Using a Vacuum-Assisted Tissue Resection Device
Article first published online: 30 OCT 2012
© Copyright 2012 by The American College of Veterinary Surgeons
Volume 41, Issue 8, pages 1011–1017, November 2012
How to Cite
Thomovsky, S. A., Packer, R. A., Lambrechts, N. E. and Moore, G. E. (2012), Canine Intervertebral Disc Fenestration Using a Vacuum-Assisted Tissue Resection Device. Veterinary Surgery, 41: 1011–1017. doi: 10.1111/j.1532-950X.2012.01060.x
- Issue published online: 30 NOV 2012
- Article first published online: 30 OCT 2012
- Manuscript Accepted: JUL 2011
- Manuscript Received: FEB 2011
Describe the use and feasibility of a novel vacuum-assisted tissue resection device (VRD) for canine intervertebral disc fenestration, and compare the effectiveness of manual fenestration to the VRD.
Randomized prospective study.
Canine cadavers (n = 15).
A cadaveric lumbar spine study was performed to compare the use of manual fenestration to a novel VRD for intervertebral disc fenestration. Both fenestration groups were compared to a control group. Effectiveness of fenestration was assessed by calculating a ratio of remaining nuclear weight postfenestration to total nuclear volume. Fenestrated discs with lower ratios were indicative of greater removal of nucleus pulposus.
There was a statistically significant reduction in mean ratio (±SD) of remaining nuclear weight to volume with both fenestration groups compared to controls (0.39 ± 0.07; P < .001). There was an improved ratio using the VRD (0.23 ± 0.09) compared to manual fenestration (0.30 ± 0.10); this was not statistically significant (P = .069). It was technically difficult to fenestrate the disc spaces at L5-L6 and L6-L7 because of location and anatomy, resulting in a statistically significant increase in the median ratio of nuclear weight-to-volume ratios in both manual and VRD fenestration groups when compared to the more cranial L4-L5 disc spaces, 0.32 ± 0.08, and 0.35 ± 0.08 versus 0.25 ± 0.13 at L4-L5 (P = .026 and P = .004, respectively).
The VRD is a feasible instrument for canine intervertebral disc fenestration. It is at least as effective as manual fenestration, and provides additional safety features.