We recommend that the user supports themselves with their hands while sitting down, e.g.:
• Support on the armrests of the chair
• Support on the handles of a walker
• Use of forearm crutches
• Use of a cane
1) Stand 5 to 10 cm in front of the edge of the chair.
2) Place both feet side by side at the same level.
3) While sitting down, distribute weight evenly on both legs and push the pel
7.1.4 Sitting
In a sitting position, i.e. when the thigh is close to a horizontal position and
there is no load on the leg, the knee joint switches to low resistance in both
the flexion and extension directions.
If an adequate load was not placed on the prosthesis while sitting down, the
leg remains extended during this process. Due to the nearly horizontal position
of the lower leg, the flexion resistance is reduced automatically and the lower
leg drops down on its own.
7.1.5 Standing up
Notwithstanding low damping while sitting, the prosthesis supports standing up.
Damping is increased after rising from the seat. From an angle of approx. 45°, the knee joint iden
tifies a "standing up process" which results in what is called "pre-locking" in the flexion direction.
This function makes it possible to stand up with pauses in between. The joint fully supports
weight during these pauses. If standing up is aborted, the "sitting down" function is activated
again.
The joint is locked after fully standing up.
1) Place the feet at the same level.
2) Lean the upper body forward.
3) Put the hands on armrests, if available.
4) Stand up with support from the hands, while keeping weight evenly distrib
7.1.6 Walking down stairs
The knee joint is locked in the flexion direction.
1) Hold the handrail with one hand.
2) Place the foot of the prosthetic leg on the first step.
3) Pull up the other leg.
INFORMATION: Walking down stairs step-over-step is not possible in
this activity mode.
While standing up, the edge of the chair should not yet touch the hollow of
the knee nor press against the lower leg.
vis in the direction of the backrest.
This causes the weight to shift to the heel and the prosthesis to tilt back
ward, which makes the knee joint switch to the "sitting resistance". Sup
port is therefore provided while sitting down.
uted over feet.
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