Ossur BALANCE KNEE OFM1 Gebrauchsanweisung Seite 8

Tighten the screws with the following torque:
• Central Screw (Fig. 1: I, J, or K): 35 Nm
• Tube Clamp Screw (Fig. 4: A): 16 Nm
Static Alignment
– Make sure the patient stands with equal weight on both legs.
– Check for correct prosthesis length.
– Check internal / external rotation.
– Check for correct load on toe and heel.
Dynamic Alignment
Ensure the patient is familiar with the functioning of the device.
Depending on which device setting is used, ensure that the patient is
familiar with the operation of the manual lock release function, or the
geometric locking function.
Note: The device is configured as a conventional locking knee at the
factory and is delivered in this setting. To use the device as a freely
movable joint, please refer to the following section: Converting the Joint -
From Locking to Mechanical.
Adjustment of stance phase stability (Fig. 5)
Stance phase stability can be adjusted by shifting the knee according to
the following:
– To increase stance phase stability; shift knee backwards compared
to socket (A).
– To allow for a more dynamic gait: shift knee forward compared to
socket (B).
For IKF adapter only: Stance flexion adjustment
The back bumper (Fig. 1 H) can be changed to increase or decrease
stance flexion:
Yellow
Red
Brown
To replace a bumper, unscrew the central screw. Replace the bumper
(holes of back bumper facing up) and reassemble according to assembly
instructions above (torque to 35 Nm).
Swing control
Adjusting the Extension Assist Spring (Fig. 6):
Turn the Extension Spring Adjustment Screw (A) to the:
• right to increase the action of the Extension Spring.
• left to decrease the action of the Extension Spring.
Adjusting axle friction (Fig. 7):
Turn the Friction Screw (C) to the:
• right to increase friction on the axle.
• left to decrease friction on the axle.
Back Bumper (with holes)
Soft
Medium
Hard
More stance phase damping
Standard
Less stance phase damping
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