81
3) Do not change the knee angle for a brief period (1/8 second). This time period prevents unin
tentional activation of the stance function while walking.
→
The blocked joint can now be loaded in the flexion direction.
Deliberate unlocking of the joint
►
By deliberately extending or unloading the knee joint, is it unlocked again.
8.1.2 Walking
Initial attempts at walking with the prosthesis always require the instruction of
trained, qualified personnel.
The hydraulics stabilise the knee joint in the stance phase and release the
knee joint in the swing phase so that the leg can swing forward freely.
Switching to the swing phase requires that the prosthesis roll over to the front
out of the stride position.
8.1.3 Running short distances ("walk-to-run" function)
For covering short distances quickly, the knee joint detects a transition from
walking to running in basic mode and automatically changes the following set
tings:
•
The swing phase angle is increased
•
Preflexion of 4° at heel strike (PreFlex) is reduced to 0°
The requirements to automatically switch to the running motion are fast for
ward movement of the prosthetic leg and high dynamic load on the knee joint.
When stopping from the running motion, the changed settings are set back to
the standard values.
INFORMATION
For covering longer distances, the prosthetist can configure a "Running" MyMode (see
page 90).
8.1.4 Sitting down
The resistance in the prosthetic knee joint while sitting down ensures even
bending into the sitting position.
The O&P professional can use the adjustment software to configure whether
the sitting process is to be supported or not.
1) Place both feet side by side at the same level.
2) While sitting down, weight should be distributed evenly between both legs
and the arm supports used where applicable.
3) Move the buttocks in the direction of the back support and lean the upper
body forward.
INFORMATION: Resistance while sitting down can be changed with the
Cockpit app via the parameter “Resistance” (see page 85)
.
8.1.5 Sitting
INFORMATION
While sitting, the knee joint also switches to energy saving mode. This energy saving mode is
activated regardless of whether the sitting function is activated or not.