Geometrical instruments – Gauge – Anatomical
Reexamination Certificate
1999-06-23
2001-04-24
Ackun, Jr., Jacob K. (Department: 3718)
Geometrical instruments
Gauge
Anatomical
C033S512000, C600S592000, C600S595000
Reexamination Certificate
active
06219929
ABSTRACT:
This invention relates to an apparatus suitable for use in assessing and measuring, in three dimensions, foot and lower limb abnormalities, and in particular to an apparatus permitting such assessment and measurement of foot and lower limb abnormalities a weight bearing (closed chain) position.
GB 2312754 describes a known apparatus for measuring foot and lower limb abnormalities which comprises a plate which is pivotally mounted upon a support structure. In use, a patient stands with one foot upon the plate, his other foot being supported by an appropriately sized step or the like. The pivot axis of the plate extends longitudinally of the plate such that the plate is pivotable in the frontal plane. The angle of the plate is adjusted until the patient's foot is properly supported. The angle of the plate is measured by measuring the displacement of markings drawn onto the patient's skin, and this information is used in the manufacture of an orthosis suitable for use by the patient. The plate may also be pivotable in the sagittal plane to permit measurement of the flexion of the ankle joint.
Such an apparatus is of relatively limited use, and it is an object of the invention to provide an apparatus permitting accurate assessment and measurement of foot and lower limb abnormalities.
According to the present invention there is provided an apparatus for assessing and measuring, in three dimensions, foot and lower limb abnormalities comprising a rear plate intended to support a rear part of a patient's foot, in use, the rear plate being pivotable in both the frontal and sagittal plan, and a front plate intended to support a front part of the patient's foot, the front plate being pivotable in the frontal plane independently of the rear plate.
The independently pivotable rear plate enables measurements to be made of movement of the sub-talar joint, typical prior arrangements measuring movement of the ankle joint, not the sub-talar joint.
The apparatus conveniently further comprises means for locking the front and rear plates and means permitting measurement of the angles of the front and rear plates.
As the apparatus of the invention permits measurement of the angle of the front plate independently of the rear plate, a clearer, more accurate assessment of a variety of abnormalities can be achieved. In particular, measurement of the positions of the patient's rearfoot and forefoot relative to the neutral or relaxed position of the sub talar and mid tarsal joints can be achieved when in a weight bearing (closed chain) position.
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patent: 5979067 (1999-11-01), Waters
patent: 2312754 (1997-05-01), None
Price Mark John
Tasker John Edwin
Ackun Jr. Jacob K.
Andrus Sceales, Starke & Sawall
Francis Faye
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