The Open Orthopaedics Journal

ISSN: ― Volume ,

Traumatic Floating Knee: A Review of a Multi-Centric Series of 172 Cases in Adult

J.-M. Feron*, 1, P. Bonnevialle2, G. Pietu3, F. Jacquot11
1 Orthopaedic and Trauma Department, HUEP Saint Antoine, UPMC-Sorbonne Universités, Paris, France
2 Orthopaedic and Trauma Department, CHU Toulouse. Université Paul Sabatier, Toulouse, France
3 Orthopaedic and Trauma Department, CHU Nantes, Université de Nantes, France


The traumatic floating knee in adults (FK) is a combined injury of the lower limb defined by ipsilateral fractures of the tibia and femur. The first publications emphasized the severity of injuries, the bad results after conservative treatment, the most severe functional outcome in case of articular fracture and the frequency of associated cruciate ligament injuries. The surgical management of FK has been highly modified according the improvement of the fracture fixation devices and the operative techniques. This retrospective multicentric observational study included 172 adults with a FK injury admitted in emergency in 5 different level I or II trauma centers. All the patients data were collected on an anonymized database. Results were evaluated by the overall clinical Karlström’s score at latest follow-up. Fracture union was assessed on X-rays when at least 3 out of 4 cortices were in continuity in two different radiological planes. A statistical analysis was performed by a logistic regression method. Despite some limitations, this study confirms the general and local severity of this high-energy trauma, mainly occurring in young people around the third decade. A special effort should lead to a better initial diagnosis of associated ligamentous injury: a tear of PCL can be suspected on a lateral-ray view and a testing of the knee should be systematically performed after fixation of the fracture under anesthesia. Secondary MRI assessment is sometimes difficult to interpret because of hardware artifacts. The timing of fracture fixation is discussed on a case by case basis. However, a first femoral fixation is recommended except in cases of tibia fracture with major soft tissue lesion or leg ischemia requiring the tibia fixation first. Also a tibia stabilized facilitates the reduction and fixation of a complex distal femur fracture. The dual nailing remains so far for us the best treatment in Fraser I FK. Further prospective studies are needed to validate treatment algorithms, best fixation techniques in order to decrease the rate of complication and improve the functional outcome of floating knee injuries.

Keywords: Damage control, floating knee, surgical timing.

Article Information

Identifiers and Pagination:

Year: 2015
Volume: Suppl 1
First Page: 356
Last Page: 360
Publisher Id: TOORTHJ-9-356
DOI: 10.2174/1874325001509010356

Article History:

Received Date: 21/02/2015
Revision Received Date: 26/04/2015
Acceptance Date: 18/5/2015
Electronic publication date: 31/7/2015
Collection year: 2015

© Feron et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Orthopaedic and Trauma Department, HUEP Saint Antoine, 184 rue du faubourg St Antoine 75571 Paris Cedex, France; Tel: +33 1 49283306; Fax: +33 1 49283307; E-mail:

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