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Measuring Functional Range of Motion in Patients with Ankle Arthritis

Goldberg, AJ; Thornton, JD; Sabah, SA; Segaren, N; Cullen, N; Singh, D; (2016) Measuring Functional Range of Motion in Patients with Ankle Arthritis. Presented at: AOFAS Annual Meeting 2016, Toronto, Canada. Green open access

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Abstract

Introduction/Purpose: Measurement of range of motion is an important outcome measure following ankle surgery. However, there is wide variation in its measurement: from clinical evaluation, to radiographic metrics, and gait analysis. The purpose of this study was to present and validate a simple, standardized technique for measurement of function total range of motion between the tibia and the floor using a digital goniometer. Methods: Institutional review board approval was obtained. Forty-five ankles from 33 participants were recruited into two groups. Group 1 (Healthy controls), comprised 20 ankles from 10 participants. None had any musculoskeletal or neurological pathology. Group 2 (Ankle osteoarthritis), comprised 25 ankles from 23 patients. Ankle pathology had been treated with ankle arthrodesis (n=5), total ankle replacement (n=6), and non-operative treatment (n=14). Measurement was performed by two testers according to a standardized protocol developed for the Pivotal Total Ankle Replacement Versus Arthrodesis (TARVA) RCT. Intra- and inter-rater reliability was calculated using intra-class correlation coefficients. Results: Group 1 (Healthy controls). The median difference for all measurements within an observer was 1.5 (IQR 0.7-2.5) degrees. The ICC for inter-rater total ankle range of motion was excellent 0.95 (0.91-0.97, 95% confidence interval, p < 0.001). The ICC for intra-rater total ankle range of motion was excellent 0.942 (0.859-0.977, 95% CI, p < 0.001). Group 2 (Ankle osteoarthritis). The median difference for all measurements within an observer was 0.6 (IQR 0.2 -1.3) degrees. The intra-class coefficient (ICC) for inter-rater total ankle range of motion was excellent 0.99 (0.97 -1.0), 95% CI, p < 0.001). The ICC for intra-rater total ankle range of motion was 0.99 (0.96 -1.0), 95% CI p < 0.001). Conclusion: This technique provides a reliable, standardized method for measurement of total functional range of motion between the tibia and the floor. The technique requires no specialist equipment or training, and provides a valid functional assessment for patients with and without ankle osteoarthritis and also following treatment even with an ankle arthrodesis.

Type: Conference item (Presentation)
Title: Measuring Functional Range of Motion in Patients with Ankle Arthritis
Event: AOFAS Annual Meeting 2016
Location: Toronto, Canada
Dates: 20-23 July 2016
Open access status: An open access version is available from UCL Discovery
DOI: 10.1177/2473011416s00033
Publisher version: https://doi.org/10.1177/2473011416S00033
Language: English
Additional information: This open-access article is published and distributed under the Creative Commons Attribution - NonCommercial - No Derivatives License (http://creativecommons.org/licenses/by-nc-nd/3.0/), which permits the noncommercial use, distribution, and reproduction of the article in any medium, provided the original author and source are credited. You may not alter, transform, or build upon this article without the permission of the Author(s).
Keywords: Ankle arthritis, Total ankle replacement, Ankle fusion, Ankle arthrodesis
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Ortho and MSK Science
URI: https://discovery.ucl.ac.uk/id/eprint/10109217
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