Geometrical instruments – Gauge – Anatomical
Patent
1994-11-30
1996-02-27
Cuchlinski, Jr., William A.
Geometrical instruments
Gauge
Anatomical
128782, A61B 5103
Patent
active
054937884
ABSTRACT:
A bone-stiffness measuring instrument comprises a set or kit of readily assembled and adjusted components, namely a goniometer, a light-weight load cell, and a small computer package, adapted to continuously respond to the outputs of the load cell and goniometer and to display and/or record (i.e., store) measured stiffness data; plus hardware in duplicate, namely, a bone-screw clamp and bracket for fixed reference to bone-screws that are externally exposed on each of the respective sides of the fracture (following removal of an external fixator), a stiff arcuate arm member of radius at least twice the diameter of the fractured bone, and a goniometer-end mount. The arcuate arm member is adjustably fixed to the bracket for bone-screw reference, and the goniometer-end mount is also adjustably fixed to the arcuate arm member, with a releasably lockable ball-joint connection for adjusted orientation of an end mounting to the goniometer.
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Cunningham et al., "The Measurement of Stiffness of Fractures Treated With External Fixation," Engineering Medicine, vol. 16, No. 4, 1987, pp. 229-232.
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James et al., "A Clinical Electrogoniometry System," Engineering in Medicine, vol. 11, No. 3 1982, pp. 123-124.
Bennett G. Bradley
Cuchlinski Jr. William A.
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