Otto Bock Empower 1A1-1 Instructions For Use Manual page 33

Changing the alignment – effects on the powered push-off
Increase socket flexion
Shift the prosthetic foot to anteri­
or
Shift the prosthetic foot to pos­
terior
Problem
The powered push-off is not
activated, even though the para­
meter Fast Power is set to
100 %
The powered push-off is over-
sensitive during the initial adjust­
ment.
The powered push-off is incon­
sistent during slow walking
The powered push-off is incon­
sistent at all walking speeds
The powered push-off is nonex­
istent or inconsistent on ramps
or stairs
Problems with powered push-off
while climbing stairs
The powered push-off is not suf­
ficient while climbing stairs
The patient feels unstable while
walking down ramps
The powered push-off is too
strong during slow walking
The powered push-off is activ­
ated too late during slow walk­
ing/fast walking
The powered push-off is activ­
ated unintentionally while turning
or standing on the level
Empower 1A1-1
• The powered push-off on toe-off gets weaker
• The powered push-off is activated later
• The powered push-off on toe-off gets stronger
• The powered push-off is activated sooner
• The powered push-off on toe-off gets weaker
• The powered push-off is activated later
Solution
• Check whether the correct body weight is set.
In the basic settings, set the parameter Self-Selected Power (Slow
•
Power and Fast Power) to 30 %. In the advanced settings, slowly
increase the parameter Power Sensitivity until a power response is shown
in the diagram.
• Check whether the correct body weight is set.
Decrease the parameter Power Sensitivity in the advanced settings.
•
Decrease the parameter Virtual Dorsi/Plantarflexion in the advanced
•
settings.
Decrease the parameter Slow Power Timing in the advanced settings.
•
• Check whether the patient is taking consistent steps. This is required for a
consistent powered push-off.
Increase the parameter Virtual Dorsi/Plantarflexion in the advanced set­
•
tings until the power response is consistent. Subsequently the parameter
Fast Power in the basic settings may have to be decreased.
• Make sure that the patient walks up the ramps and stairs so that only the
toe region of the prosthetic foot makes contact and the knee is slightly
bent. The entire body weight should rest on the prosthesis at this time.
Increase the parameter Virtual Dorsi/Plantarflexion in the advanced set­
•
tings to 50 %. In the basic settings, increase the parameter Fast Power by
10 %. Have the patient walk at normal speed. At the same time, increase
the parameter Cadence Range in the advanced settings until a normal
power response is shown in the diagram. Then perform another test with
the proper walking technique.
Increase the parameter Toe Strike in the advanced settings.
•
• Increase the parameter Fast Power in the basic settings.
In addition or alternatively: Increase the parameter Virtual Dor­
si/Plantarflexion in the advanced settings by 30 % to 50 %.
Have the patient walk at normal speed. At the same time, increase the
parameter Cadence Range in the advanced settings until a normal power
response is shown in the diagram.
Reduce the parameter Resistance at Heelstrike in the basic settings.
•
Check whether the setting is also suitable for walking on the level.
Decrease the parameter Slow Power in the basic settings.
•
Decrease the parameter Slow Power Timing/Fast Power Timing in the
•
advanced settings.
• Decrease the parameter Toe Strike in the advanced settings.
Preparation for use
33