Universität zu Köln

Hackl, Michael ORCID: 0000-0002-6183-5621, Wegmann, Kilian, Ries, Christian, Leschinger, Tim ORCID: 0000-0003-1319-6949, Burkhart, Klaus Josef and Mueller, Lars Peter (2015). Reliability of Magnetic Resonance Imaging Signs of Posterolateral Rotatory Instability of the Elbow. J. Hand Surg.-Am. Vol., 40 (7). S. 1428 - 1434. PHILADELPHIA: W B SAUNDERS CO-ELSEVIER INC. ISSN 1531-6564

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Abstract

Purpose To evaluate radiographic signs of posterolateral rotatory instability (PLRI) on magnetic resonance imaging (MRI). The goal was to establish objective radiographic criteria to aid in the diagnosis of PLRI. Methods The MRI scans of 60 patients were evaluated retrospectively. Two study groups were compared. Group 1 (n = 30) consisted of unstable elbows in which PLRI was confirmed by clinical examination and arthroscopy. Group 2 (stable; n = 30) served as the control group. Patients in group 2 had transient epicondylitis without clinical suspicion of instability. Joint incongruity was analyzed for sagittal views through the radial head and the coronoid tip and for corona] and axial views. Interobserver and intra-observer reliability were evaluated. Results In the sagittal view through the radial head, average radiocapitellar incongruity differed significantly between groups 1 and 2. In addition, mean ulnohumeral incongruity in an axial view through the motion axis of the distal humerus showed significant differences between groups. Sagittal views through the tip of the coronoid and coronal views did not reveal significant differences in patients with unstable elbows compared with the control group. Conclusions The current study provides useful MRI criteria indicative of PLRI when combined with physical examination. Cutoff points of 1.2 mm for radiocapitellar incongruity (sagittal view) and 0.7 mm for axial ulnohumeral incongruity (axial view) are suitable to screen for PLRI. Radiocapitellar incongruity greater than 2 mm and axial ulnohumeral incongruity greater than 1 mm are highly suspicious of elbow instability. Copyright (C) 2015 by the American Society for Surgery of the Hand. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hackl, Michael UNSPECIFIED orcid.org/0000-0002-6183-5621 UNSPECIFIED Wegmann, Kilian UNSPECIFIED UNSPECIFIED UNSPECIFIED Ries, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Leschinger, Tim UNSPECIFIED orcid.org/0000-0003-1319-6949 UNSPECIFIED Burkhart, Klaus Josef UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, Lars Peter UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-400412
DOI:	10.1016/j.jhsa.2015.04.029
Journal or Publication Title:	J. Hand Surg.-Am. Vol.
Volume:	40
Number:	7
Page Range:	S. 1428 - 1434
Date:	2015
Publisher:	W B SAUNDERS CO-ELSEVIER INC
Place of Publication:	PHILADELPHIA
ISSN:	1531-6564
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LATERAL EPICONDYLITIS; RECONSTRUCTION; DIAGNOSIS; LIGAMENT; REPAIR Multiple languages Orthopedics; Surgery Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/40041