Repeatability of the KT-1000 arthrometer in a normal population
| Autor: | Randall R. Wroble, Brian L. Shaffer, Laura A. Van Ginkel, Edward S. Grood, Frank R. Noyes |
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| Rok vydání: | 1990 |
| Předmět: |
Adult
Male medicine.medical_specialty Knee Joint Movement Physical Therapy Sports Therapy and Rehabilitation Knee Injuries 03 medical and health sciences 0302 clinical medicine Medicine Humans Orthopedics and Sports Medicine Physical Examination Orthodontics 030222 orthopedics business.industry Significant difference Normal population 030229 sport sciences Repeatability Surgery Biomechanical Phenomena Evaluation Studies as Topic Ligaments Articular Female business |
| Zdroj: | The American journal of sports medicine. 18(4) |
| ISSN: | 0363-5465 |
| Popis: | Despite its popularity, the MEDmetric KT-1000 arthro meter's reliability remains inadequately documented. We conducted this study to determine the magnitude of trial-to-trial (within installation), installation-to-instal lation (within day), and day-to-day (between day) vari ability of anterior/posterior translation measurements in normal knees.We selected six normal subjects, three males and three females, and tested each on 6 consecutive days with three separate installations per day. We recorded the total anterior/posterior translation at ±89 and ±134 N force at 25° of flexion during three consecutive trials in a single installation.Analysis of variance showed that no significant differ ence existed between trials (within installation) or be tween installations (within day) for all parameters. How ever, we did find a significant difference between days for individual right and left knee translation measure ments at 89 and 134 N force. More importantly, no significant difference existed between days for right to left differences at both force levels.The magnitude of the expected measurement varia bility was expressed by computing 90% confidence limits for total anterior/posterior translation at ±89 N force. These were ±1.5 mm for the right knees, ±1.4 mm for the left knees, and ±1.6 mm for the right-left differences. Fischer's protected least significant differ ence post hoc test revealed that for all parameters, the 1 st day measurements were significantly less than those on following days, suggesting that patient and examiner adjust to the testing procedure.We conclude that the standard KT-1000 evaluation should report paired differences rather than individual knee measurements. Additionally, initial evaluation should be supplemented by follow-up examinations for verifying translation values. |
| Databáze: | OpenAIRE |
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