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

Use
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, you can also choose
between an intuitive and a conscious 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).
Deliberate locking of the joint
1) Assume the desired knee angle.
2) Do not change the knee angle for a brief period.
→ The blocked joint can now be loaded in the flexion direction.
Deliberate unlocking of the joint
► The deliberate stance function is automatically deactivated again by extending the knee or by repositioning the
leg (e.g. taking a step).

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 even bending into the
sitting position.
The adjustment software can be used to configure whether the sitting process is to be sup­
ported 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
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 39).

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.
36
supports used where applicable.
C-Leg 3C98-3/3C88-3