Internal Fixation

Authors: S. Bumbacher, M. F. Bryner, A. E. Fürst, F. Del Chicca, S. K. Ringer and M. A. Jackson
Journal: Equine Veterinary Education

A closed complete mid-diaphyseal spiral fracture of the left femur in a one-year-old donkey was treated with a 4.5 mm titanium locking compression plate distal femur (LCP-DF). This plate was originally manufactured for human orthopaedics, primarily for femoral osteosynthesis. The LCP-DF has a distal head plate that was advantageous in this case because the distal fragment was smaller. Post operative radiographs showed optimal femoral reconstruction and a callus was present 3 weeks after surgery. The donkey was sound at the walk and trot 2 months after surgery.

Authors: Jan M. Kuemmerle, Karolin Kühn, Marco Bryner and Anton E. Fürst
Journal: Veterinary Surgery

Abstract
Objective

To evaluate if the use of locking head screws (LHS) in the distal holes of a locking compression plate (LCP) applied to the caudal aspect of the ulna to treat equine ulnar fractures is associated with a risk of injury to the lateral cortex of the radius.
Study Design

Controlled laboratory study.
Sample Population

Cadaveric equine forelimbs (n = 8 pair).
Methods

Authors: Varun Prabhakar, Mulinti Raghunath, Tarunbir Singh, Narinder Singh Saini, Jitender Mohindroo, Shashi Kant Mahajan
Journal: Journal of Equine Veterinary Science

A 7-month-old, 180-kg, female foal was presented with open diaphyseal fracture of the left third metacarpal bone. The fractured limb was stabilized preoperatively with external coaptation. Open reduction and internal fixation were done using 4.5-mm broad dynamic compression plate, which was applied in a neutralization manner. Postoperatively, external support with padded bandage reinforced with gutter splint made of fiber glass was provided. The incisional infection and the contaminated wound on medial aspect of the metacarpal were managed with regular dressing.

Authors: M. Madron, S. Caston and K. Kersh
Journal: Equine Veterinary Education

A mature Thoroughbred gelding that was used as a high level jumper presented for evaluation of a nonweightbearing forelimb lameness following a fall. Radiographs revealed a complete, noncomminuted, minimally displaced sagittal fracture of the greater tubercle. Supporting limb laminitis was a major concern in the short term based on the severe lameness at presentation. Open reduction with internal fixation was chosen over stall rest in an attempt to more rapidly return the weightbearing function to the limb.

Authors: Benjamin J. Ahern, Brent L. Showalter, Dawn M. Elliott, Dean W. Richardson and Liberty M. Getman
Journal: Veterinary Surgery

Abstract

Objectives

To compare the in vitro biomechanical properties of a 4.5 mm narrow locking compression plate (PIP-LCP) with 2 abaxially located transarticular screws and a 4.5 mm limited contact dynamic compression plate (LC-DCP) with 2 abaxially located transarticular screws using equine pasterns.

Study Design

Experimental. Paired in vitro biomechanical testing of 2 methods for stabilizing adult equine forelimb PIP joints.

Animal

Adult equine forelimbs (n = 8 pairs).

Methods

Authors: R. J. Payne and P. C. Compston
Journal: Equine Veterinary Journal

Summary

Reasons for performing study: Standing fracture repair in the horse is a recently described surgical procedure and currently there are few follow-up data. This case series contains 2 novel aspects in the standing horse: repair of incomplete sagittal fractures of the proximal phalanx and medial condylar repair from a lateral aspect.

Objectives: To describe outcome in a case series of horses that had lower limb fractures repaired under standing sedation at Rossdales Equine Hospital.

Authors: Alvaro G. Bonilla, DVM; Katie J. Smith, BVetMed, MSc, DACVS
Journal: Journal of the American Veterinary Medical Association

Case Description—A 4-month-old Standardbred colt was examined because of a fractured right calcaneus of 8 days' duration with increased distraction of the fracture fragment evident on sequential radiographs. Clinical Findings—The foal was severely lame with diffuse periarticular tarsal swelling. Radiographically, a complete, displaced long oblique fracture of the right calcaneal body was evident. Because the fracture gap was increasing with time and lameness remained severe, despite medical management, surgical repair was recommended.

Authors: L. M. Getman, M. W. Ross and M. A. Smith
Journal: Equine Veterinary Education

A yearling Arabian filly presented with a history of acute hindlimb lameness, marked tarsocrural effusion and associated soft tissue swelling and was diagnosed with fractures of both the lateral and medial malleoli of the distal aspect of the tibia. The fractures were repaired using a combination of cortical bone screws placed in lag fashion and a tension band wire. A full limb cast bandage was placed for recovery from general anaesthesia and the early post operative period.

Authors: D. D. Quinteros, J. M. Garcia-Lopez, G. A. Abuja, M. Tarkanian, L. S. Maranda, K. Bubeck, M. P. Kowaleski
Journal: Veterinary and Comparative Orthopaedics and Traumatology (VCOT)

Objective: To determine if the mechanical properties (strength and stiffness) of a new prototype 4.5 mm broad locking plate (NP-LP) are comparable with those of a traditional 4.5 mm broad limited-contact self compression plate (LC-SCP), and to compare the bending and torsional properties of the NP-LP and LC-SCP when used in osteotomized equine third metacarpal bones (MC3). Methods: The plates alone were tested in four-point bending single cycle to failure. The MC3-plate constructs were created with mid-diaphyseal osteotomies with a 1 cm gap.

Authors: Sara D. Lawhon, Deanna A. Sutton, Natalie D. Halbert, Jeffrey P. Watkins
Journal: Journal of Equine Veterinary Science

Two months following the surgical repair of an acute, open, comminuted, and articular fracture of the left olecranon, a 15-year-old American Saddlebred gelding presented with nonweight-bearing lameness. A fungus cultured from the cubital joint was identified as Scedosporium prolificans by sequencing of the D2 large subunit ribosomal DNA region and subsequently confirmed by phenotypic methods. Therapy with systemic fluconazole, terbinafine and intra-articular voriconazole was attempted, but was unsuccessful.