Otto Bock Genium Patient Information page 10

The prosthetic leg will not be fully extended upon heel impact. An active knee joint would be required to
achieve this. Since the knee joint is locked in the flexion direction during this phase, putting weight on it
does not pose a hazard. You can then resume walking normally. The stairs and obstacles function can
be activated by the prosthetist using the X-Soft configuration software.
Optimized Physiological Gait (OPG) function
OPG minimizes the Genium user's prosthetic deviations and promotes a more biomechanically cor-
rect gait pattern. There are no initiation or exit strategies that apply to OPG - it simply happens during
the course of normal walking. Selection of this function enables the following features: (1) PreFlex (2)
Adaptive Yielding Control (3) Dynamic Stability Control (DSC) (4) Stance Release on Ramps, and (5)
Adaptive Swing Phase Control. Adaptive Swing Phase Control and DSC are enabled even if OPG is
not selected on the functions tab.
OPG FEATURES
(1) PreFlex
PreFlex ensures the knee is in four degrees of flexion at the end of swing phase in preparation for load-
ing response. PreFlex allows users to walk with natural stance flexion independent of gait speed. The
prosthetic foot will also reach foot flat more quickly to promote stability especially on uneven surfaces
when PreFlex is present. PreFlex also allows users to ascend ramps in a more anatomically correct way
by reducing the need for users to vault over a fully extended knee.
(2) Adaptive Yielding Control
The knee has an intelligent, auto adaptive control of stance flexion (max 17°) and extension movements,
depending on the forces affecting the knee system. The varying stance flexion resistance experienced
by the user is e.g. dependent on the behavior of the user, the surface condition and the angle of a slope
or incline.
(3) Dynamic Stability Control (DSC)
DSC ensures the knee will not release stance resistance during biomechanically unstable static and
dynamic conditions. Constantly checking multiple parameters, DSC ensures the optimally timed decision
for the knee to safely switch from stance to swing. Because DSC is always monitoring knee function,
multidirectional movement and walking backward are also possible without risk of stance resistance
releasing.
(4) Stance Release on Ramps
Although flexed and partially loaded - the knee will release stance on hills and ramps to allow for greater
knee flexion, improved swing phase clearance, and less hip flexion force needed to bring the shank
into extension.
(5) Adaptive Swing Phase Control
Instantaneous adaptation to varied walking cadences and to changes of the pendular mass (i.g. varying
footgear) ensures the knee always achieves the swing flexion target angle within (+/-) one degree. The
swing extension and flexion resistance experienced by the user is autoadaptive.
Enabling the OPG function:
Enable the OPG function by selecting the corresponding checkbox. When this function is activated,
both stance phase extension and swing phase extension are adjusted automatically. This means that the
configurations in these areas are not necessary and the corresponding slider bars in the Swing phase
and Stance phase tabs of the adjustment software are deactivated.
INFORMATION
Your prosthetist can activate these MyModes using the X-Soft configuration software.
34 | Ottobock Genium - Bionic Prosthetic System