Walking; Sitting Down; Sitting - Otto Bock C-Leg 3C98-3 Instructions For Use Manual

The stance function is a functional supplement to the basic mode. This function makes it easier for the patient to
stand on an inclined surface for a longer time. The joint is fixed in the flexion direction at a flexion angle between 5°
and 65°.
This function must be enabled in the adjustment software. Once the function is enabled, it is also possible to
choose between an intuitive and a manual lock.
Intuitive locking of the joint
The intuitive stance function recognises any situation that puts strain on the prosthesis in the flexion direction but
where flexion is not permitted. Examples of this include standing on uneven or sloping surfaces. The knee joint is
always locked in the flexion direction when the prosthetic leg is not fully extended and is kept still for a brief
moment. Upon forward or backward rollover or extension, the level of resistance is immediately reduced to stance
phase resistance again.
The knee joint is not locked when the above conditions are met and a sitting position is assumed (for example while
driving).
The stance function can also be set manually to any flexion angle between 5° und 65° (see the next section).
Manual joint lock
1) Flex the joint between 5°and 65° and keep it still for one second.
2) Slowly extend the joint up to the desired standing angle.
3) In this position, keep the joint still for one second until it vibrates.
→ The blocked joint can now be fully loaded in the flexion direction.
Releasing the manual joint lock
► Quickly extend the joint or tilt the thigh slightly forward or more than 50° back.

9.1.2 Walking

Initial attempts at walking with the prosthesis always require the instruction of trained, quali­
fied 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.

9.1.3 Sitting down

The resistance in the prosthetic knee joint while sitting down ensures evenly bending into the
sitting position.
1) Place both feet side by side at the same level.
2) While sitting down, distribute weight evenly between both legs and use armrests, if avail­
3) Move the buttocks in the direction of the backrest and lean the upper body forward.

9.1.4 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.
C-Leg 3C98-3/3C88-3
able.
Use
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