Walking Down Stairs; Walking Down A Ramp; Walking Down Flat Steps; Kneeling - Otto Bock C-Leg 3C98-3 Instructions For Use Manual

Use

9.1.7 Walking down stairs

The joint makes it possible to walk down stairs step-over-step or one at a time.
Walking down stairs step-over-step
Walking down stairs step-over-step must be practised and executed consciously. The knee
joint can switch correctly and permit a controlled rollover only by stepping down properly
with the sole of the foot. The motion must be carried out in a continuous pattern in order to
allow the motion sequence to proceed in a fluid manner.
1) Hold the handrail with one hand.
2) Position the leg with the prosthesis on the step so that the foot projects halfway over the
3) Roll the foot over the edge of the step.
4) Place the foot of the other leg onto the next step.
Walking down stairs one step at a time (step by step)
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.

9.1.8 Walking down a ramp

Under increased flexion resistance, permit controlled flexion of the knee joint which lowers
the body's centre of gravity.
The swing phase is not triggered even though the knee joint is flexed.

9.1.9 Walking down flat steps

To walk down ramps, flat steps or curbs, walking step-over-step with knee flexion under load
is recommended for the best possible relief of the contralateral side upon the subsequent
ground contact. This knee flexion should be initiated immediately upon heel strike, or as long
as the prosthetic leg is still in front of the body.
For skilled users the prosthesis offers the option of initiating a swing phase while walking
down ramps and crossing flat steps (such as curbs). In order to do so, the body's centre of
gravity has to be far enough in front of the supporting leg and the swing phase has to be ini­
tiated with the leg extended. If the foot is positioned so that it projects far beyond the edge of
the step in this situation, swing phase initiation may be surprising. However, the contralater­
al leg is ready to hold the weight in this situation.

9.1.10 Kneeling

Under increased flexion resistance, permit controlled flexion of the prosthetic knee joint to
gradually reach the kneeling position. A hard impact of the knee joint on the ground should
be avoided so the electronics are not damaged.
Using the 4X860=* C-Leg Protective Cover or the 4P862 guard is recommended for kneel­
ing frequently.
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edge of the step.
→ This is the only way to ensure a secure rollover.
→ This flexes the prosthesis slowly and evenly under high flexion resistance.
C-Leg 3C98-3/3C88-3