Surgery – Truss – Pad
Patent
1983-06-10
1989-11-28
Hindenburg, Max
Surgery
Truss
Pad
A61B 510
Patent
active
048830690
ABSTRACT:
A three-plane goniometer or angle measuring apparatus includes three small potentiometers which are closely spaced together to measure rotation of the knee about three different axes. The unit is primarily mounted on a cuff on the outside of the thigh. The mounting assembly for the three plane goniometer includes a curved yoke where the ends of the yoke curve from the front to the rear, with the goniometer unit being held between the ends of the rearwardly extending arms of the yoke, so that accurate measurement may be maintained in all three planes even while the knee is bent to its extreme flexed position. Extending downwardly from the goniometer is a square rod which slidably engages a square hole in a nylon ball mounted in a two-axis gimbal, which is secured to a cuff strapped to the calf of the leg. Injuries may be diagnosed or characterized by comparing the pattern for one leg before injury with the pattern for that leg after injury or by comparing the pattern for one (healthy) leg with that for the other (injury) leg. The goniometer is mounted so that it may be readily reversed and used for both the right and left legs. Associated processing circuitry includes corresponding reversing circuits for conforming the plots for the right and left leg, and also includes special face marking circuitry. Comparative tests may be made for different types of footwear and athletic playing surfaces, and the torque which is produced may be compared to determine the preferred foot gear or playing surface.
REFERENCES:
Chao et al., ISA Trans., vol. 17, No. 1, 1978, pp. 13-19.
Chao et al., J. Biomed. Eng., vol. 102, No. 4, Nov. 1978, pp. 301-310.
Townsend et al., J. Biomech., vol. 10, No. 3, 1977, pp. 183-193.
Kettlekamp et al., "An Electrogoniometric Study of Knee Motion in Normal Gait," Journal of Bone and Joint Surgery, vol. 52--A, No. 4, Jun. 1970, pp. 775-790.
Hanley J.
Hindenburg Max
Physical Diagnostics, Inc.
Zegeer, Esq. Jim
LandOfFree
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