Financial support for this study was provided by The James Foundation.
A Tapered-Sleeve Transcortical Pin External Skeletal Fixation Device for Use in Horses: Development, Application, and Experience
Article first published online: 3 DEC 2008
© Copyright 2008 by The American College of Veterinary Surgeons
Volume 37, Issue 8, pages 725–732, December 2008
How to Cite
NUNAMAKER, D. M. and NASH, R. A. (2008), A Tapered-Sleeve Transcortical Pin External Skeletal Fixation Device for Use in Horses: Development, Application, and Experience. Veterinary Surgery, 37: 725–732. doi: 10.1111/j.1532-950X.2008.00461.x
Dr. Nash manufactures, sells, and distributes the device and associated instrumentation described in this report through Ron Nash Engineering, 977 Stephens Highway Magnolia, AR 71753.
- Issue published online: 3 DEC 2008
- Article first published online: 3 DEC 2008
- Submitted December 2007; Accepted May 2008
Objective— To report development, configuration, application, and results of a tapered-sleeve transcortical pin external skeletal fixation device (TSP ESFD) for use on fractures of the distal aspect of the equine limb.
Study Design— Optimization analysis of a TSP ESFD was carried out with mechanical testing and review of clinical case outcomes.
Animals— Cadaveric adult third metacarpal bones (MC3) for mechanical testing; horses (n=7) with severely comminuted proximal (6; P1) or second (1) phalanx fractures.
Methods— Mechanical testing of methods for attachment of TSP to the sidebars were tested as well as optimization of pin diameters. Outcome of clinical cases managed with the TSP ESFD were compared with outcomes of horses treated with previous ESFD.
Results— A TSP ESFD using 7.94 mm diameter pins was used. Survival rate was 71%. One horse with an infected P1 fracture and contralateral laminitis subsequently fractured MC3 through the distal pin hole while wearing the TSP ESFD. One mare with contralateral laminitis was euthanatized. Three horses had open fractures.
Conclusions— Design improvements incorporated into the TSP ESFD should increase treatment success.
Clinical Relevance— External skeletal fixation continues to be a viable treatment alternative for severe injuries of the distal aspect of the equine limb. TSP ESFD should improve on the success of treatment by decreasing complications of bone fracture at the pin interface.