Multi-section limb and ligament evaluation apparatus and...

A - Human Necessities – 61 – B

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A61B 5/11 (2006.01) A61B 5/103 (2006.01)

Patent

CA 2705241

A method and apparatus for reliably positioning a 3-segment limb, such as a leg or arm for imaging and medical analysis, which can accommodate for the patient's "natural alignment". The apparatus positions the limb in such a way that the position of the proximal segment is controlled while an known external torque is applied at a known rate to the distal segment. The location of each of the limb's three segments is recorded using either external or internal measurement techniques, and the relative motions between the proximal and intermediate segments are used in the orthopedic evaluation of the proximal joint. Furthermore, the relative motions between the intermediate and distal segments are used in the orthopedic evaluation of the distal joint. By applying a known torque at a known rate, clinicians will be provided with valuable information related to joint range of motion, stability, laxity, and compliance.

L'invention porte sur un procédé et sur un appareil pour positionner de façon fiable un membre à 3 segments, tel qu'une jambe ou un bras pour une imagerie et une analyse médicale, que l'on peut adapter à « l'alignement naturel » du patient. L'appareil positionne le membre de telle sorte que la position du segment proximal est contrôlée pendant qu'un couple externe connu est appliqué selon une ampleur connue au segment distal. L'emplacement de chacun des 3 segments du membre est enregistré à l'aide de techniques de mesure soit externes, soit internes, et les mouvements relatifs entre les segments proximal et intermédiaire sont utilisés pour l'évaluation orthopédique de l'articulation proximale. De plus, les mouvements relatifs entre les segments intermédiaire et distal sont utilisés pour l'évaluation orthopédique de l'articulation distale. En appliquant un couple selon une ampleur connue, des cliniciens obtiendront des informations valables liées à l'amplitude de mouvement, à la stabilité, au relâchement et à l'élasticité de l'articulation.

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