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2.11 Finishing the Prosthesis
Upon finalizing all settings, all screws must be fastened and tightened to the proper torque.
1 Optional: Remove the cosmetic foam cover (and also the BionicLink, if present).
2 Secure all screws required for the prosthesis alignment (see Section 2.3) with 636K13 Loctite.
3 Tighten all screws to the proper torque (see Section 2.3) with the 710D4 Torque Wrench.
4 Optional: Apply the cosmetic foam cover or the 4X160=* C-Leg Protector.
2.12 Important User Instructions
INFORMATION
Advise your patients of the information in this section.
Safety mode
Aside from the operation modes (1st, 2nd and 3rd mode), the CLeg® has a safety mode. The C-leg automatically
switches to safe mode if a critical system fault occurs. In this mode, the prosthesis sets a high level of flexion damp-
ing (high safety/reduced comfort). This allows the patient to walk even though the system is not active.
The switch to the safety mode is announced immediately prior to the switch with sound and vibration signals.
CAUTION
Non-active safety mode. If the safety mode can no longer be activated, there is the risk that the patient will fall.
If the C-Leg does not switch to the safety mode (e.g. because of a short-circuit due to water penetration), the
amputee must actively stabilize the C-Leg at heel strike with his/her residual limb muscles until a prosthetist can
be reached or a prosthesis replacement be accomplished.
CAUTION
Danger when activating the safety mode. Upon activation of the safety mode, the damping behaviour of the
joint changes. In certain situations, this can cause the patient to fall.
As soon as the sound and vibration signals go off simultaneously, the prosthesis wearer must stop all activities
with the leg prosthesis. After approximately 10 seconds, and from a secure standing position, check to see if the
safety mode with the high flexion damping has been activated by slightly bending the C-Leg repeatedly under
controlled weight bearing.
CAUTION
Safety mode cannot be deactivated. If the joint is exclusively in the safety mode, the joint has a defect. When
in this condition, malfunctions can occur. This can cause the patient to fall.
If the safety mode is not deactivated by connecting and removing the battery charger, then a fault condition exists.
Contact a prosthetist to correct the problem.
C-Leg Prosthetic System
Ottobock 23
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