Clinical evaluation of a new noninvasive ankle arthrometer
Deutscher übersetzter Titel: | Klinische Evaluierung eines neuen nicht-inavasiven Gelenk-Arthrometers |
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Autor: | Nauck, Tanja; Lohrer, Heinz; Gollhofer, Albert |
Erschienen in: | The physician and sportsmedicine |
Veröffentlicht: | 38 (2010), 2, S. 55-61, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0091-3847, 2326-3660 |
DOI: | 10.3810/psm.2010.06.1783 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201104003711 |
Quelle: | BISp |
Abstract des Autors
Introduction: A nonradiographic arthrometer was developed to objectively quantify anterior talar drawer instability in stable and unstable ankles. Diagnostic validity of this device was previously demonstrated in a cadaver study. The aim of the present study was to validate the ankle arthrometer in an in vivo setting. Methods: Twenty-three subjects participated in the study. An orthopedic surgeon first performed a manual anterior talar drawer test to classify the subjects' ankles as stable or unstable. The subjects were then evaluated using the ankle arthrometer, and filled out a validated self-reported questionnaire (German version of the Foot and Ankle Ability Measure [FAAM-G]). Ankle stiffness was calculated from the low linear region (40-60 N) of the load deformation curves obtained from the ankle arthrometer. Reliability testing of these stiffness values was done based on load deformation curves, with 150 and 200 N maximum anterior drawer loads applied in the ankle arthrometer. Results: Using the manual anterior drawer test, 16 ankles were classified as stable and 7 were classified as unstable. Arthrometer stiffness analysis differentiated stable from unstable ankles (P = 0.00 and P = 0.01, respectively). Test-retest demonstrated an accurate reliability (intraclass correlation coefficient = 0.80). A significant correlation was found between both FAAM-G subscales and the arthrometer stiffness values (r = 0.43 and 0.54; P = 0.04 and 0.01). Discussion Subjects with and without mechanical ankle instability could be differentiated by ankle arthrometer stiffness analysis and the FAAM-G questionnaire results. This nonradiographic device may be relevant for screening athletes at risk for ankle injuries, for clinical follow-up studies, and implementing preventive strategies. Conclusion: Validity and reliability of the new ankle arthrometer is demonstrated in a small cohort in an in vivo setting. Verf.-Referat