Possible Problem Solutions - Otto Bock 7E10 Helix 3D Instructions For Use Manual

3.6.3 Possible problem solutions

If the knee joint does not extend during the stance phase after stance phase flexion when used with the
hip joint, this may be due to a number of different reasons.Therefore, please check the possible causes and, if
applicable, make the specified adaptations to achieve knee joint extension during the stance phase:
The stance phase resistance of the Helix
set too high.
The stride length, which results from the free swing
range and the swing phase resistance, is set too high.
The prosthetic alignment is not optimal.
Stance phase damping of the knee joint is too low.
If the C­Leg®, in addition, does not switch to the swing phase mode at the end of the stance phase when using
the Helix Hip Joint, this can have the following causes:
3D
The forefoot load value is not reached during roll­over.
If the Helix Hip Joint does not go into extension at heel strike, this can have several causes. Therefore, please
3D
check the following possible causes and, if applicable, make the specified adaptations to achieve extension of
the Helix Hip Joint at heel strike:
3D
The stance phase resistance of the Helix
set too high.
The stride length, which results from the free swing
range and the swing phase resistance, is set too high.
The prosthetic alignment is not optimal.
Helix
C-Leg / Genium: no extension during the stance phase
Cause
Hip Joint is
3D
C-Leg® does not switch to the swing phase
Cause
Helix : no extension at heel strike
3D
Cause
Hip Joint is
3D
Possible solution
Reduce the stance phase resistance (Section 3.6.2).
Increase the swing phase resistance and/or reduce the free
swing range (Section 3.6.2).
Control and optimisation of the sagittal prosthetic alignment
under load (section 3.4).
The stance phase damping settings of the knee joint should
be optimised for sitting down and for step­over­step climb­
ing and descending of stairs and ramps.
Possible solution
Check the forefoot load during walking using C­Soft and
correct, if necessary
C­Soft Instructions for Use: 647G268).
Possible solution
Reduce the stance phase resistance (Section 3.6.2).
Increase the swing phase resistance and/or reduce the free
swing range (Section 3.6.2).
Control and optimisation of the sagittal prosthetic alignment
under load (section 3.4).
Helix
3D
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