Use of an ex vivo canine ventral slot model to test the efficacy of a piezoelectric cutting tool for decompressive spinal surgery
Article first published online: 5 AUG 2013
© Copyright 2013 by The American College of Veterinary Surgeons
Volume 42, Issue 7, pages 832–839, October 2013
How to Cite
Farrell, M., Solano, M. A., Fitzpatrick, N. and Jovanovik, J. (2013), Use of an ex vivo canine ventral slot model to test the efficacy of a piezoelectric cutting tool for decompressive spinal surgery. Veterinary Surgery, 42: 832–839. doi: 10.1111/j.1532-950X.2013.12051.x
- Issue published online: 1 OCT 2013
- Article first published online: 5 AUG 2013
- Manuscript Accepted: 9 JUN 2013
- Manuscript Received: 25 JAN 2013
To test the efficacy of a piezoelectric instrument (PI) for bone removal during ventral slot surgery.
Ex vivo feasibility study.
Cadaveric canine cervical spinal specimens (n = 3; C1–7; C1–T1; C2–T1).
The spinal cord of each explanted spinal unit was replaced with a saline-filled latex condom. In 8 disc spaces, ventral slot surgery was performed using a previously reported technique. Bone removal was achieved using a motorized burr (MB). In 8 disc spaces, bone was removed via en bloc ostectomy with a PI that selectively cuts mineralized tissue. Surgical duration and operating field visibility were recorded. Rupture of the fluid filled condom was used as a measure of iatrogenic collateral trauma. Computed tomography was used to measure ventral slot morphometry.
Mean surgical duration for PI (23.4 minutes) was significantly shorter than for MB (34.1 minutes; P = .049). Using a 4 point Likert scale (4 = excellent, 3 = good, 2 = fair, 1 = poor), median visibility score was significantly higher for PI (2) than for MB (1; P = .03). The condom burst twice (1MB, 1PI) during elevation of the dorsal longitudinal ligament; there was no significant difference between techniques for incidence of collateral trauma (P = .99). Regardless of surgical technique, there was a bias in slot deviation towards the right (i.e., the surgeon's left; P = .021).
The PI allowed completion of ventral slots in a significantly shorter time, without an increased incidence of iatrogenic trauma. The right-handed surgeon showed a left-sided aiming bias, regardless of surgical technique.