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Article

Reliability of the Fluoroscopic Assessment of Load-Induced Glenohumeral Translation during a 30° Shoulder Abduction Test

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Department of Biomedical Engineering, University of Basel, 4001 Basel, Switzerland
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Department of Orthopaedics and Traumatology, University Hospital Basel, 4031 Basel, Switzerland
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Department of Clinical Research, University of Basel, 4031 Basel, Switzerland
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Department of Spine Surgery, University Hospital Basel, 4031 Basel, Switzerland
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IMES Institute of Mechanical Systems, Zurich University of Applied Sciences ZHAW, 8400 Winterthur, Switzerland
*
Author to whom correspondence should be addressed.
Academic Editor: Jim Dickey
Biomechanics 2022, 2(2), 255-263; https://doi.org/10.3390/biomechanics2020020
Received: 25 April 2022 / Revised: 14 May 2022 / Accepted: 17 May 2022 / Published: 19 May 2022
Rotator cuff tears are often linked to superior translational instability, but a thorough understanding of glenohumeral motion is lacking. This study aimed to assess the reliability of fluoroscopically measured glenohumeral translation during a shoulder abduction test. Ten patients with rotator cuff tears participated in this study. Fluoroscopic images were acquired during 30° abduction and adduction in the scapular plane with and without handheld weights of 2 kg and 4 kg. Images were labelled by two raters, and inferior–superior glenohumeral translation was calculated. During abduction, glenohumeral translation (mean (standard deviation)) ranged from 3.3 (2.2) mm for 0 kg to 4.1 (1.8) mm for 4 kg, and from 2.3 (1.5) mm for 0 kg to 3.8 (2.2) mm for 4 kg for the asymptomatic and symptomatic sides, respectively. For the translation range, moderate to good interrater (intra-class correlation coefficient ICC [95% confidence interval (CI)]; abduction: 0.803 [0.691; 0.877]; adduction: 0.705 [0.551; 0.813]) and intrarater reliabilities (ICC [95% CI]; abduction: 0.817 [0.712; 0.887]; adduction: 0.688 [0.529; 0.801]) were found. Differences in the translation range between the repeated measurements were not statistically significant (mean difference, interrater: abduction, −0.1 mm, p = 0.686; adduction, −0.1 mm, p = 0.466; intrarater: abduction 0.0 mm, p = 0.888; adduction, 0.2 mm, p = 0.275). This method is suitable for measuring inferior–superior glenohumeral translation in the scapular plane. View Full-Text
Keywords: shoulder; rotator cuff; glenohumeral instability; humeral head migration; fluoroscopy; abduction shoulder; rotator cuff; glenohumeral instability; humeral head migration; fluoroscopy; abduction
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MDPI and ACS Style

Croci, E.; Künzler, M.; Börlin, S.; Eckers, F.; Nüesch, C.; Baumgartner, D.; Müller, A.M.; Mündermann, A. Reliability of the Fluoroscopic Assessment of Load-Induced Glenohumeral Translation during a 30° Shoulder Abduction Test. Biomechanics 2022, 2, 255-263. https://doi.org/10.3390/biomechanics2020020

AMA Style

Croci E, Künzler M, Börlin S, Eckers F, Nüesch C, Baumgartner D, Müller AM, Mündermann A. Reliability of the Fluoroscopic Assessment of Load-Induced Glenohumeral Translation during a 30° Shoulder Abduction Test. Biomechanics. 2022; 2(2):255-263. https://doi.org/10.3390/biomechanics2020020

Chicago/Turabian Style

Croci, Eleonora, Marina Künzler, Sean Börlin, Franziska Eckers, Corina Nüesch, Daniel Baumgartner, Andreas Marc Müller, and Annegret Mündermann. 2022. "Reliability of the Fluoroscopic Assessment of Load-Induced Glenohumeral Translation during a 30° Shoulder Abduction Test" Biomechanics 2, no. 2: 255-263. https://doi.org/10.3390/biomechanics2020020

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