Otto Bock 3R120, Instructions For Use Manual

Page: 46 / 52

46 | Ottobock
6.2.9 Positioning the prosthetic socket
► For positioning the prosthetic socket, note Fig.
22
on page 16 and the instructions that fol­
low.
Thomas test
► Place the flat hand
2
under the lumbar spine.
►
Instruct the recumbent patient 1 to flex the contralateral knee joint and hip joint.
►
Bring the residual limb to hip flexion until the hollow back disappears.
►
Extend the residual limb slowly by pushing it until the pressure of the spine on the back of
your hand diminishes.
► In this residual limb position, measure angle α of the flexion malposition.
Socket flexion
►
Based on angle α, determine the optimum socket flexion β 3 according to the illustration.
►
Set the socket flexion β so that the lateral socket reference point 4 lies on the alignment ref­
erence line.
INFORMATION: If the socket reference point 5 cannot be positioned on the alignment reference
line with the adapters that are installed, special adapters have to be used ( 6 examples of
adapters).
Socket adduction
► Based on the socket length, determine the required angle γ 7 for socket adduction, and
reconcile this with a possible residual limb malposition.
► Set the socket adduction γ so that the frontal socket reference point 8 lies on the alignment
reference line.
INFORMATION: If the socket reference point 9 cannot be positioned on the alignment reference
line with the adapters that are installed, special adapters have to be used (
10
examples of
adapters).
6.2.10 Shortening the tube adapter
CAUTION
Incorrect processing of tube
Fall due to damage to the tube
► Do not clamp the tube into a vice.
► For shortening the tube, use only a tube cutter.
INFORMATION: The overall system height of all prosthetic components corresponds to the sock­
et-floor measurement (see Fig.
23
on page 17).
► Shorten and deburr the tube adapter.
6.2.11 Mounting the lock slide and lock release cable
►
CAUTION!
Use the lock slide only as shown in Fig.
24
on page 18 and mount it together with
the lock release cable.
6.2.12 Preventing damage at maximum flexion
►
NOTICE!
Perform the steps shown in Fig.
25
on page 18 to prevent damage at maximum flex­
ion.
► Besides the socket design measures shown in the figure, ensure that no metal is touching the
product in the marked support area.
► After utilising the maximum flexion, check the marked support area for damage.
► CAUTION! In case of deformation, damage and cracks, the prosthetic knee joint needs to be
replaced entirely.