Bench Alignment In Alignment Apparatus - Ottobock C-Leg 3C98-3 Gebrauchsanweisung

Preparation for Use

7.1.3 Bench alignment in alignment apparatus

A correct bench alignment (e.g. using the 743A200 PROS.A. Assembly alignment apparatus) ensures that the user
can benefit from all the advantages of the product. If the L.A.S.A.R. Assembly alignment apparatus (743L200) is
available, it can be used as well. The position of the residual limb must be taken into account when positioning the
socket connector. Plumb lines in the frontal and sagittal planes (drawn from the hip joint's centre of rotation and
marked during plaster cast taking and trial fitting of the check socket) will facilitate correct positioning of the lamin­
ation anchor or socket adapter.
66 | Ottobock
Position the middle of the foot (MF) approx. 30 mm/1.18 inch
anterior to the alignment reference line (A). This applies to all
foot components that are recommended for use with the product,
regardless of the previous alignment specifications in the instruc­
tions for use of those feet!
Noting the alignment recommendation of the foot component,
add 5 mm to the effective heel height (shoe heel height – sole
thickness in the forefoot area) and set the outward rotation of the
foot.
Place the alignment reference point (=knee axis) approx.
0-5 mm/0-0.19 inch anterior to the alignment reference line.
Take into account the knee-ground distance and outward rotation
of the knee (the adapter insert provides for a rotation of approx.
5°). Recommended sagittal positioning of the alignment refer­
ence point: 20 mm/0.79 inch above the medial tibial plateau.
Connect the foot and knee joint using a tube adapter. To do so,
tilt the joint in the correct position and set the required tube
length.
Mark the lateral centre of the socket with a centred, proximal dot
and a distal dot. Mark a line through both dots from the socket
brim to the end of the socket.
Hyperextend the socket and insert a spacer bushing so the
hyperextended position does not change during the alignment.
Now position the socket such that the alignment reference line
passes through the proximal centre dot.
Adjust the socket flexion to 3° – 5°, but take the individual situ­
ation (e.g. hip joint contractures) and the ischial tuberosity-to-
ground distance into account.
The adjustment software helps to determine the socket flexion
precisely.
Connect the socket and modular knee joint using an adapter.
C-Leg 3C98-3/3C88-3