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Results
In all cases, palpation of the bone fragments through soft tissues was sufficient for their successful reposition. Correct intramedullary pin placement was not difficult without fluoroscopy. The surgery time of these procedures was limited to less than one hour. During recovery, in all patients the external fixation did not limit the motion range of the leg. The mean healing time was 40 days (range 28-56), as assessed by radiology.
WSVA7-0043 ORTHOPEDICS
INSTANTENEOUS CENTRE OF ROTATION IN THE CANINE STIFLE FOLLOWING CRANIAL CRUCIATE LIGAMENT TRANSECTION AND STABILISING SURGERY
R. Gundersen1, J. Miles1
1University of Copenhagen, Department of Veterinary Clinical Sciences, Frederiksberg C, Denmark
Introduction
Previous studies have shown that the instantaneous centre of rotation (ICR) of the stifle moves following cranial cruciate ligament transection. Restoration of ICR position might be indicative of successful stifle stabilisation surgery.
Objectives
The aim of this study was to identify ICR positional changes following cranial cruciate ligament transection (CCLt), medial meniscal release (MMR) and triple tibial osteotomy (TTO) compared to intact canine stifles.
Methods
Fluoroscopic video recordings were obtained from 9 stifles under intact, CCLt, MMR and TTO conditions. Using cubic splines and a least squares approach, bony landmarks were used to calculate ICR positions, and resulting curves aligned and scaled using Blumensaat’s line to enable visual comparison (Figure 1).
(Figure 1: ICR coordinate system x-axis aligned with Blumensaat’s line on femur)
An Urban Experience
   Fig 2. The fracture line, post-operation image, and control at the day of implant removal
In all cases, the construct could be removed under sedation only.
Conclusions
Humeral factures in cats rarely involve the condyles. Most often the diaphysis is affected. In such cases intramedullary pin tie-in method provides a rigid fixation resulting in good conditions for healing. This external fixation method is very flexible and useful for various humeral fracture types, from simple transverse to severely comminuted.
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