Knee ligament testing device and method of use

Details Knee ligament testing device and method of use Knee ligament testing device and method of use

1989-01-09

1990-11-13

Green, Randall L.

Surgery

Truss

Pad

128782, A61B 5103

Patent

active

049694715

ABSTRACT:
A device for measuring displacement of the tibia from a stationarily held patella in response to a specific anterior/posterior force applied on the tibia comprises a reference member which establishes a fixed reference line extending from the patella to a region located distally on the tibia. A measurement member has one end hingedly attached to the reference member and its other end slidingly attached to a tibia paddle which rests on the proximal region of the tibia. A rotatable yoke on the tibia paddle has one prong which rests on the lateral flare of the tibia while another prong of the yoke rests on the medial flare of the tibia. In response to a specific anterior/posterior force: the measurement arm is angled with respect to the reference member in proportion to the anterior/posterior displacement of the tibia; the paddle is moved with respect to the measurement member in proportion to the medial/lateral displacement of the tibia; and the yoke is rotated in angulation proportional to the rotation of the tibia about the proximal/distal axis. A sensor is respectively associated with the measurement member, the paddle and the yoke to record the resultant displacements.

REFERENCES:
patent: 4220163 (1980-09-01), Afzali
patent: 4501266 (1985-02-01), McDaniel
patent: 4799997 (1989-01-01), Riley
patent: 4823807 (1989-04-01), Russell et al.
patent: 4834057 (1989-05-01), McLeod, Jr.

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