A Comparison of Three Different Methods of Measurement of Knee Deformity in Osteoarthritis

Abstract

See, stats, and : https : / / www . researchgate . net / publication / 302556449 A Measurement Osteoarthritis Article - Journal , Rheumatology DOI : 10 . 19104 / jorm . 2016 . 107 CITATIONS 0 READS 105 5 , including : Some : fTechnology : Results project Assessment (AP) knee - invasive volunteers Kamal Golden 62 SEE Perrico NHS 13 SEE Frederic University 174 , 620 SEE All . The . Abstract The recognition of the pattern and severity of deformity in knee osteoarthritis has important implications in its management and prognosis . A number of methods can be used to assess and measure the coronal and sagittal knee alignment : clinical deformity measuring device like a goniometer , standard knee radiographs , hip - knee - ankle (HKA) radiographs , computer navigation systems , magnetic resonance scan , computerized tomographic scan or simply a surgeon ' s subjective measurement . Each of these methods has advantages and disadvantages . The aim of this study was to compare three methods of measurement : clinical measurement with a goniometer ; HKA radiographs and computer navigation . This study included 54 patients with arthritic knees , who underwent total knee replacement with computer navigation . The deformity in both coronal and sagittal planes was measured using the three methods and the results compared using Bland Altman limits of agreement . The clinical measurement differed greatly from radiographic and computer navigation measurements . According to Bland Altman limits of agreement clinical measurements could be up to 10° away from the radiographic or computer navigated measurements in coronal plane . In the sagittal plane the clinical measurements could be up to 12° away compared to computer navigation measurements . A combination of these measurements methods should be taken into account when assessing the deformity of a knee especially in relation to posture and weight bearing status . The methodical clinical measurement of knee deformity as described in this paper gives too wide a margin of error and should not be relied upon in isolation .