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The 2003 Annual Meeting of OASYS_NEW |
Not yet assigned to a slot - 2:20 AM
An Analysis of Symmetry of Displacement of the Distal Radioulnar Joint in Normal Subjects
Matsuoka J1, Berger R2, Neale P1, and Amrami K3. (1) Orthopedic Biomechanics Laboratory, Mayo Clinic, 200 First Street SW, Guggenheim 128, Rochester, MN, USA, (2) Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN, USA, (3) Department of Radiology, Mayo Clinic, 200 First Street SW, Rochester, MN, USA
Purpose: To evaluating a patient with painful DRUJ. We developed a new method of a quantitative in-vivo measurement of forearm torque strength and dynamic CT imaging comparing the right and left sides. Materials and Methods: 50 bilateral wrists were subjected. A device was developed to allow standard CT imaging simultaneously of bilateral DRUJs in preset position. A quantitative value called the Instability Index was used to define displacement. Peak torque was measured using a special testing apparatus in the same conditions with the CT protocol. Results: The weakest torque strength was found in resisted pronation in the pronated position, and resisted supination in the supinated position. The Instability Index showed differences that trends of displacement related to testing condition . Discussion: These data are being compiled as a normative database and this study looks at the use of this method on the normal population to validate its use for patients.