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Case Reports in Orthopedics
Volume 2015 (2015), Article ID 294187, 4 pages
http://dx.doi.org/10.1155/2015/294187
Case Report

An Unexpected Complication of Hip Arthroplasty: Knee Dislocation

1Department of Orthopaedics and Traumatology, Ankara Numune Training and Research Hospital, 06100 Ankara, Turkey
2Department of Orthopaedics and Traumatology, Ankara Kecioren Training and Research Hospital, 06280 Ankara, Turkey
3Department of Orthopaedics and Traumatology, Ankara Ataturk Training and Research Hospital, 06800 Ankara, Turkey

Received 16 February 2015; Revised 17 June 2015; Accepted 18 June 2015

Academic Editor: John Nyland

Copyright © 2015 Serdar Yilmaz et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An increasing number of patients with hip fracture have been seen with osteoporosis associated with osteoarthritis. Although knee dislocation is related to high-energy trauma, low-grade injuries can also lead to knee dislocation which is defined as “ultra-low velocity dislocation.” The case reported here is of an 82-year-old patient who presented with a left intertrochanteric hip fracture. Partial arthroplasty was planned because of osteoporosis. In the course of surgery, degenerative arthritic knee was dislocated during the hip reduction maneuver with the application of long traction. The neurovascular examination was intact, but the knee was grossly unstable and was dislocated even in a brace; thus a hinged knee prosthesis was applied nine days after surgery. The patient was mobilized with crutches after the knee prosthesis but exercise tolerance was diminished. In conclusion, it should be emphasized that overtraction must be avoided during the hip reduction maneuver in patients with advanced osteoarthritic knee.