Measurements of knee rotation-reliability of an external device in vivo
<p>Abstract</p> <p>Background</p> <p>Knee rotation plays an important part in knee kinematics during weight-bearing activities. An external device for measuring knee rotation (the Rottometer) has previously been evaluated for validity by simultaneous measurements of ske...
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| Format: | Article |
| Language: | English |
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BMC
2011-12-01
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| Series: | BMC Musculoskeletal Disorders |
| Online Access: | http://www.biomedcentral.com/1471-2474/12/291 |
| _version_ | 1818918660046061568 |
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| author | Almquist Per O Ekdahl Charlotte Isberg Per-Erik Fridén Thomas |
| author_facet | Almquist Per O Ekdahl Charlotte Isberg Per-Erik Fridén Thomas |
| author_sort | Almquist Per O |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Knee rotation plays an important part in knee kinematics during weight-bearing activities. An external device for measuring knee rotation (the Rottometer) has previously been evaluated for validity by simultaneous measurements of skeletal movements with Roentgen Stereometric Analysis (RSA). The aim of this study was to investigate the reliability of the device.</p> <p>Method</p> <p>The within-day and test-retest reliability as well as intertester reliability of the device in vivo was calculated. Torques of 3, 6 and 9 Nm and the examiner's apprehension of end-feel were used at 90°, 60° and 30° of knee flexion. Intraclass Correlation Coefficient <sub>2,1 </sub>(ICC <sub>2,1</sub>), 95% confidence interval (CI) of ICC and 95% CI between test trials and examiners were used as statistical tests.</p> <p>Result</p> <p>ICC<sub>2,1 </sub>ranged from 0.50 to 0.94 at all three flexion angles at 6 and 9 Nm as well as end-feel, and from 0.22 to 0.75 at 3 Nm applied torque.</p> <p>Conclusion</p> <p>The Rottometer was a reliable measurement instrument concerning knee rotation at the three different flexion angles (90°, 60° and 30°) with 6 and 9 Nm applied torques as well as the examiner's apprehension of end-feel. Three Nm was not a reliable torque. The most reliable measurements were made at 9 Nm applied torque.</p> |
| first_indexed | 2024-12-20T00:53:29Z |
| format | Article |
| id | doaj.art-745def018ce34d11b1ebecbe2308f82b |
| institution | Directory Open Access Journal |
| issn | 1471-2474 |
| language | English |
| last_indexed | 2024-12-20T00:53:29Z |
| publishDate | 2011-12-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Musculoskeletal Disorders |
| spelling | doaj.art-745def018ce34d11b1ebecbe2308f82b2022-12-21T19:59:10ZengBMCBMC Musculoskeletal Disorders1471-24742011-12-0112129110.1186/1471-2474-12-291Measurements of knee rotation-reliability of an external device in vivoAlmquist Per OEkdahl CharlotteIsberg Per-ErikFridén Thomas<p>Abstract</p> <p>Background</p> <p>Knee rotation plays an important part in knee kinematics during weight-bearing activities. An external device for measuring knee rotation (the Rottometer) has previously been evaluated for validity by simultaneous measurements of skeletal movements with Roentgen Stereometric Analysis (RSA). The aim of this study was to investigate the reliability of the device.</p> <p>Method</p> <p>The within-day and test-retest reliability as well as intertester reliability of the device in vivo was calculated. Torques of 3, 6 and 9 Nm and the examiner's apprehension of end-feel were used at 90°, 60° and 30° of knee flexion. Intraclass Correlation Coefficient <sub>2,1 </sub>(ICC <sub>2,1</sub>), 95% confidence interval (CI) of ICC and 95% CI between test trials and examiners were used as statistical tests.</p> <p>Result</p> <p>ICC<sub>2,1 </sub>ranged from 0.50 to 0.94 at all three flexion angles at 6 and 9 Nm as well as end-feel, and from 0.22 to 0.75 at 3 Nm applied torque.</p> <p>Conclusion</p> <p>The Rottometer was a reliable measurement instrument concerning knee rotation at the three different flexion angles (90°, 60° and 30°) with 6 and 9 Nm applied torques as well as the examiner's apprehension of end-feel. Three Nm was not a reliable torque. The most reliable measurements were made at 9 Nm applied torque.</p>http://www.biomedcentral.com/1471-2474/12/291 |
| spellingShingle | Almquist Per O Ekdahl Charlotte Isberg Per-Erik Fridén Thomas Measurements of knee rotation-reliability of an external device in vivo BMC Musculoskeletal Disorders |
| title | Measurements of knee rotation-reliability of an external device in vivo |
| title_full | Measurements of knee rotation-reliability of an external device in vivo |
| title_fullStr | Measurements of knee rotation-reliability of an external device in vivo |
| title_full_unstemmed | Measurements of knee rotation-reliability of an external device in vivo |
| title_short | Measurements of knee rotation-reliability of an external device in vivo |
| title_sort | measurements of knee rotation reliability of an external device in vivo |
| url | http://www.biomedcentral.com/1471-2474/12/291 |
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