Spirit MT200 User Manual page 19

Symmetry
The Symmetry program provides basic gait information and a feedback graph. The program will
measure the left and right step length and calculates the symmetry index. The message window
will display the user's Cadence, Left and Right step length in inches (or centimeters) and
Symmetry index.
The Dot Matrix display will show a graph indicating step symmetry so the user has a visual
feedback to aid in improving their gait. If the user has a longer step length with their left leg the
graph will increase in size on the left of the dot matrix as shown below.
When the program ends, either by the set time reaching zero or pressing stop twice at any time
during the program, a summary is shown in the message window. The summary gives the
average cadence, step lengths and average symmetry for the amount of time the user walked.
1. Press the Symmetry key then press the Enter key.
2. The message window will prompt you to enter the Time for the program. You may enter
the time using the Up and Down keys or the numeric key pad then press the Enter key to
accept and proceed to the next screen.
3. Now you are finished editing the settings and can begin by pressing the Start key. All
data calculations will use the patient information from the Set Up function (Set Up key at
top left of console).
4. During the program you will be able to scroll through the data in the message window by
pressing the Display key.
5. When the program ends you may press Start to begin the same program again or Stop to
exit the program, or you can save the program you just completed as the Facility
program by pressing the Facility key and following the instructions in the message
window.
Biofeedback Graph:
Below is a sample picture showing the symmetry graph. In the message window there is an
average step cadence, left and right step length and symmetry measurements. In the example
below the step length numbers shown indicate that the left leg is stepping longer than the right leg,
26 vs. 15 inches. The graph reflects the longer stride of the left leg. If the step length was even
only two dots would be lit on the bottom center of the graphic screen.
Note: For some types of gaits it may be possible that the left/right data can be displayed in reverse. If this occurs
press the Symmetry program key to flip the display.
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MT200