Universität zu Köln

Lechler, Philipp, Frink, Michael, Gulati, Aashish, Murray, David, Renkawitz, Tobias, Buecking, Benjamin, Ruchholtz, Steffen and Boese, Christoph Kolja (2014). The influence of hip rotation on femoral offset in plain radiographs. Acta Orthop., 85 (4). S. 389 - 396. NEW YORK: INFORMA HEALTHCARE. ISSN 1745-3682

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Abstract

Background and purpose - Adequate restoration of femoral offset (FO) is critical for successful outcome after hip arthroplasty or fixation of hip fracture. Previous studies have identified that hip rotation influences the projected femoral offset (FOP) on plain anteroposterior (AP) radiographs, but the precise effect of rotation is unknown. Patients and methods - We developed a novel method of assessing rotation-corrected femoral offset (FORC), tested its clinical application in 222 AP hip radiographs following proximal femoral nailing, and validated it in 25 cases with corresponding computed tomography (CT) scans. Results - The mean FORC was 57 (29-93) mm, which differed significantly (p < 0.001) from the mean FOP 49 (22-65) mm and from the mean femoral offset determined by the standard method: 49 (23-66) mm. FORC correlated closely with femoral offset assessed by CT (FOCT); the Spearman correlation coefficient was 0.94 (95% CI: 0.88-0.97). The intraclass correlation coefficient for the assessment of FORC by AP hip radiographs correlating the repeated measurements of 1 observer and of 2 independent blinded observers was 1.0 and 1.0, respectively. Interpretation - Hip rotation affects the FOP on plain AP radiographs of the hip in a predictable way and should be adequately accounted for.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lechler, Philipp UNSPECIFIED UNSPECIFIED UNSPECIFIED Frink, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Gulati, Aashish UNSPECIFIED UNSPECIFIED UNSPECIFIED Murray, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Renkawitz, Tobias UNSPECIFIED UNSPECIFIED UNSPECIFIED Buecking, Benjamin UNSPECIFIED UNSPECIFIED UNSPECIFIED Ruchholtz, Steffen UNSPECIFIED UNSPECIFIED UNSPECIFIED Boese, Christoph Kolja UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-432726
DOI:	10.3109/17453674.2014.931196
Journal or Publication Title:	Acta Orthop.
Volume:	85
Number:	4
Page Range:	S. 389 - 396
Date:	2014
Publisher:	INFORMA HEALTHCARE
Place of Publication:	NEW YORK
ISSN:	1745-3682
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NECK-SHAFT ANGLE; ARTHROPLASTY; FRACTURES; MOTION; RANGE Multiple languages Orthopedics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/43272