Otto Bock 3WR95 Instructions For Use Manual page 17

5. Mark the lateral center of the socket with a centered, proximal and a centered, distal dot. Mark
a line through both points from the edge to the end of the socket.
6. Position the socket so that the proximal center point of the socket coincides with the alignment
reference line. Adjust the socket flexion to 3° – 5°, but take the individual situation (e.g. hip
joint contractures) and the ischial tuberosity-to-ground distance into account!
CAUTION
Errors during prosthesis alignment. Errors during prosthesis alignment can lead to malfunction
of the 3WR95 Knee Joint and to early wear. This can cause the patient to fall.
The joint will be positioned too far to the anterior if socket flexion is not taken into account. Move
the lamination anchor to the correct position by foaming up, if necessary.
Position the socket so that the proximal center of the socket coincides with the alignment refer-
ence line.
Position the 4WR95=1 or 4WR95=2 Lamination Anchor along the alignment reference line.
Move the 3WR95 Knee Joint axis of rotation (alignment reference point) back 15 mm relative to
the alignment reference line.
5.1.2 Static alignment optimisation using the 743L100 L.A.S.A.R. Posture (Fig. 7)
Significant optimisation of the bench alignment is possible using the L.A.S.A.R. Posture. In order
to achieve sufficient safety while providing easy swing phase initiation, please proceed as follows:
1. To measure the load line, the transfemoral amputee steps on the L.A.S.A.R. Posture force mea-
surement plate with the prosthetic fitting side and places the other leg on the height compen-
sation plate. Sufficient weight should be placed on the prosthesis side (> 35 % body weight).
2. Now the alignment should only be adjusted by changing the plantar flexion so that the load
line (laser line) runs approx. 45 mm in front of the knee axis (alignment reference point).
3. After this step, perform dynamic optimisation during trial walking.
5.2 Adjustment
5.2.1 Adjusting the swing phase control
To avoid damage, the swing phase control adjustments must be made by the prosthetist using
the 4X50 Adjustment Wrench inserted into the joint! The adjustment wrench should be kept
by the prosthetist after the trial fitting. The flexion and extension resistance is set separately
by positioning the pins on the left and right sides of the piston rod. The adjusting pins are only
accessible in the housing slots when the knee joint is flexed.
5.2.2 Adjusting the flexion (Fig. 2)
Bend the knee joint all the way to the stop
Use the adjusting wrench to set the adjusting pin on the side labelled „Flexion", according to the
chart.
Turning the key back = low flexion resistance= 0
Turning the key forward = highest flexion resistance= 8
NOTICE
Adjusting procedure and removing the adjusting wrench.
The knee joint must be flexed during the adjusting procedure and before the adjusting wrench
is removed from the housing.
3WR95 Ottobock | 17