Manual Adjustments; Stance Flexion - Össur bionic RHEOLOGIC Technical Manual

Note: Auto adjustment affects stance flexion and swing flexion only.
Note: If the auto adjustment mode is not manually disabled, it will automatically disable itself on the 200th
step. The minimum number of steps is 60. For primary amputees, a personalized gait setting is recommended,
which should be updated as the gait improves. When the primary amputee is able to walk 60–90 steps, the auto
adjustment procedure should be performed.

Manual adjustments

important: When making adjustments, make sure that the user is in a stable standing position or seated. All
RHEO KNEE functions (including stance phase stability) will be interrupted during the period in which the
settings are updating.
The Manual Adjustments tab contain five settings to adjust gait parameters – and one feature that allows for
keeping the knee locked in extension (Figure 9).

Stance flexion

Stance flexion (level ground) depicts the prosthetic limb in stance phase moving into knee flexion. This
adjustment is the primary mechanism of providing additional knee stability to the user when walking on level
ground. It also allows for the user to walk using a stance flexion ambulation pattern. Adjustment varies from
0–100. The default value is 50.
1. Slider 2. Arrows 3. Value 4. Checkbox
4
3
1
2
3
4
1
2
Figure 9
Stance flexion (stairs and ramps) depicts a set of stairs and ramp. This setting will allow for independent
resistance to be established for ramp and stair walking. Adjustment varies from 0 – 100. The default value is 50.
Increasing the stance flexion resistance allows for a faster increase in stance support for the user. On level
ground, the stance flexion rate may be slower and will require increased loading to initiate. On stair/ramp
descent, the user will descend more slowly and with greater support. Decreasing the stance flexion resistance
allows for slower increase in stance support for the user. On level ground, this means that the stance flexion rate
may be more rapid and will require decreased load to initiate. On stair/ramp descent, the user will descend more
rapidly and with less support.
The RHEO KNEE requires one step to transition between level ground walking resistance and stair/ramp
resistance. The RHEO KNEE stance control settings may be customized to maximize security or terrain
recognition depending on the user's preference.
9