B
iodex Balance System SD offers reports for each of the five test modes. These can be used to
objectively measure and record the patient’s ability to stabilize the involved joint under static or
dynamic stress. Reports can be generated to reflect single leg, both legs and bilateral comparison
testing protocols. Report formats include Postural Stability, Limits of Stability, Athlete Single
Leg, CTSIB and Fall Risk. Progress reports that graph overall stability scores from each test date
are also available.
Sample reports for each testing mode are provided later in this chapter.
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The following parameters appear on various reports:
Stability Level: Indicates the stability (stiffness) of the foot platform. When "locked", the foot plat-
form is fully stable. A setting of 12 is the most stable "released" setting. A setting of one is the
least stable foot platform setting. Stability settings of 12 through one allow the foot platform a
full 20 degrees of deflection from level in any direction. For patient centering prior to testing, the
foot platform deflection is limited to less than five degrees.
Overall Stability Index (SI): Represents the variance of foot platform displacement in degrees,
from level, in all motions during a test. A high number is indicative of a lot of movement during
a test with static measures; it is the angular excursion of the patient's center of gravity.
Use as a starting point for a perfectly balanced state.
COB x=0; COB y=0 COB is "Center of Balance"
Anterior/Posterior (AP) Stability Index: Represents the variance of foot platform displacement in
degrees, from level, for motion in the sagittal plane.
9. REPORTS
— 9-1 — REPORTS
∑ (0 - X)
2
+ ∑ (0 - Y)
2
number of samples
Overall Stability Index =
∑ (0 - Y)
2
number of samples
Anterior/Posterior Stability Index =
=
(
(Dl) =
Dly =
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