Dynamic system for determining human physical instability

Details Dynamic system for determining human physical instability Dynamic system for determining human physical instability

1996-12-06

1998-11-03

Hindenburg, Max

Surgery

Diagnostic testing

Measuring anatomical characteristic or force applied to or...

A61B 5103

Patent

active

058301585

ABSTRACT:
A dynamic system adapted to test a patient to determine the degree to which his physical stability is impaired and therefore predisposes the patient to injurious falls. The system includes an unsteady platform supported at a raised position above ground and free to rock about a horizontal X-axis and about a Y-axis which intersects the X axis at the center of the platform and is normal thereto so that the orientation of the platform is changeable relative to these axes. Mounted on the platform are electronic clinometers that yield signals which are a function of the deviation of the platform from the horizontal X and Y axes and therefore depend on the changing orientation of the platform when a patient to be tested stands thereon. These signals are fed to a computer whose output is applied to a video monitor having a display screen on which is presented a cursor the position of which is controlled by the signals. The standing patient, while viewing the screen, is required to so shift his weight on the platform as to alter its orientation to produce signals causing the cursor to travel from the center of the screen toward a computer-generated target presented on one corner of the screen, and to then acquire the target. The computer measures and scores the time it takes for the patient to cause the cursor to acquire the target as well as other variables that reflect the relative instability of the patient. These scores, taken together, define a stability index useful in deciding how then to treat the patient to improve his condition.

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