Surgery – Truss – Pad
Patent
1984-01-16
1989-01-24
Coven, Edward M.
Surgery
Truss
Pad
128782, A61B 500
Patent
active
047994975
ABSTRACT:
An apparatus for measuring a person's knee laxity. A pair of clamps are provided to secure a person's knee adjacent one end of a table. A hinged platform is pivotally attached to the table end. The person's ankle is clamped to a smaller platform which is supported by rollers on the hinged platform. An elongate tibia-tracking element has one end pivotally connected to the hinged platform beneath the knee and the other end connected to the ankle-supporting platform. A potentiometer is connected to the tibia tracking element and provides resistance readings which are proportional to angular movement of the element. An ohmeter senses resistance while force is applied to the medial or lateral sides of the tibia. Correlation of the applied forces to the degree of tibia movement for each force provides an indication of knee laxity.
REFERENCES:
patent: 4277828 (1981-07-01), Tateishi
patent: 4323080 (1982-04-01), Melhart
Bechtel et al., "Skier's Knee", Physic. & Sports Medicine, vol. 12, No. 11, 11/84, pp. 51-54.
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