Relative stiffness of 3 bandage/splint constructs for stabilization of equine midmetacarpal fractures

Abstract

Deflection was determined by the difference between the height of the model's supported free end before application of a 4.5 kg weight and at the conclusion of the deflection test. There was no significant difference in the amount of deflection between bandage/splint combinations (78 ± 32 mm (RJB-1), 94 ± 44 mm (RJB-3), and 93 ± 33 mm (SS)) CONCLUSIONS: The one-layer bandage with splint was equivalent to either RJB configuration in the mean amount of deflection in the simple model of a fracture.

Comparison of Two Bandage Splint Constructs in an Ex Vivo Equine Metacarpal Fracture Model

“…This was originally demonstrated in the experimental model by Lutter and colleagues and our results support their conclusions. 11 However, there was a significant difference between the two constructs in the pre- and post-deflection angles, indicating that there are differences regarding how the leg is held within the bandage. The lower pre- and post-deflection angles of the RJB splint construct indicate better anatomic alignment of the fracture ends compared with the SS splint construct, and could translate to improved patient comfort, or even a more inherently stable limb/bandage/splint configuration when forces other than bending are applied.…”

“…This time period was based on previous published work of a 24-hour deflection test. 11 Following 18 minutes, the weight was removed, post-deflection vertical distance to the ground similarly measured and recorded, and a second dorsopalmar radiograph projection of the metacarpus obtained with the construct in a horizontal position. The procedure was repeated for the matching paired limb with the other bandage placed.…”

“…5 9 10 In addition, a recent study failed to detect any significant difference between a RJB/splint construct and a single-stack (SS) bandage with splints when measuring deflection in a wooden fracture model, casting doubt on whether the RJB is a more stable fixation. 11…”

Operative treatment of splint bone fractures in horses

“…Although most reported etiology for these fractures is external trauma such as kicking, usually uncomplicated closed fractures are encountered. Two types of treatment options have been reported for distal fractures which are conservative and surgical treatments, respectively (8,10,(12)(13)(14). Different fractures of forearm bones in foals can be treated with modified Thomas splint applications (11).…”

“…Suspensor desmitis risk is mentioned as a complication after both treatment options. In addition, in cases where a comminuted fracture is formed in the splint bone, exuberant callus formation caused by excessive movement in the fracture line are also mentioned (8,10,(12)(13)(14). In the long-term, excessive exuberant callus compresses the surrounding soft tissues and results with local pain and lameness.…”