Stance Function; Walking; Sitting Down - Ottobock C-Leg 3C88-3 Gebrauchsanweisung

8.1.1.1 Stance function

INFORMATION
If this function has been enabled in the adjustment software, the stance function can be activ­
ated/deactivated using the cockpit app (see Page 59) or the remote control (optional access­
ory).
The stance function (standing mode) is a functional supplement to the basic mode (mode 1). This
function makes it easier for the user 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 automatic and manual lock.
Auto joint lock
The auto 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 slop­
ing surfaces. The knee joint is always locked in the flexion direction when the prosthetic leg is not
fully extended and is at rest. Upon forward or backward rollover or extension, the level of resist­
ance 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 joint lock
► Quickly extend the joint or tilt the thigh slightly forward or more than 50° back.

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 Sitting down

The resistance of the product while sitting down ensures that the knees bend
evenly, thereby supporting the contralateral side.
1) Position both feet side by side at the same level.
2) While sitting down, the user should distribute his/her weight evenly
3) Move the buttocks in the direction of the backrest and lean the upper body
54 | Ottobock
between both legs and use armrests, if available.
forward.