Use; Movement Patterns In Basic Mode (Mode 1); Standing; Stance Function - Otto Bock X2 Series Instructions For Use Manual

9 Use

9.1 Movement patterns in basic mode (mode 1)

9.1.1 Standing

Knee control through high hydraulic resistance and static alignment.
A stance function can be enabled by the prosthetist. Please see the following
section for further information on the stance function.

9.1.1.1 Stance function

INFORMATION
To use this function, it needs to be enabled in the adjustment software. It also has to be activ­
ated using the Cockpit app (see Page 84).
The stance function (standing mode) is a functional supplement to the basic mode (mode 1). This
function makes it easier, for example, to stand on an inclined surface for a longer time. The joint is
fixed in the flexion direction.
The standing function must be enabled by the O&P professional. In addition, the type of joint
locking (conscious/intuitive) has to be established by the O&P professional. Changing the locking
type using the Cockpit app is not possible.
Intuitive locking of the joint
The intuitive stance function recognises any situation that puts strain on the prosthesis in the flex­
ion 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, under some amount of load and at rest. 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 remove the entire load from the prosthesis.
3) Do not change the knee angle for a brief period (1/8 second). This time period prevents unin­
tentional activation of the standing function.
→ The blocked joint can now be fully loaded in the flexion direction.
Deliberate unlocking of the joint
► By deliberately extending or unloading the knee joint, is it unlocked again.

9.1.2 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.
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