Technical Data - Otto Bock 3R93 Instructions For Use Manual

3 Technical Data

Proximal connection
Distal connection
Max. knee flexion angle (Fig. 3)
Weight
System height
Proximal system height up to alignment reference point 8 mm
Distal system height up to alignment reference point
Max. user weight
Mobility grade according to MOBIS®
4 Handling
4.1 Alignment
CAUTION
Risk of falling as a result of incorrect alignment. Errors during the alignment of the prosthesis
can lead to malfunction of the joint up to loss of functionality due to structural failure. This can
cause the patient to fall. Observe the alignment instructions.
The advantages of the 3R93 can only be made optimal use of in case of a correct alignment.
The optimal residual limb position must be anticipated when positioning the socket connector
(Fig. 8). Plumb lines in the frontal and sagittal planes, drawn from the hip joint centre of rotation
and marked while taking the plaster cast and during trial fitting of the test socket, will facilitate
correct positioning of the lamination anchor or socket adapter.
To align the prosthesis please proceed in two steps:
First make the bench alignment using an alignment tool such as 743L200 L.A.S.A.R. Assembly or
743A200 PROS.A. Assembly. For subsequent static alignment optimization, please use 743L100
L.A.S.A.R. Posture.
4.1.1 Bench Alignment with Alignment Tool (Fig. 8)
1 Position the middle of the foot (MF) approx. 30 mm anterior to the alignment reference line.
This applies to all foot components that are recommended for use with 3R93, independently
of the specifications in the Instruction for Use of these feet!
2 Add 5 mm to the required heel height. Set correct outward rotation of the foot.
3 Clamp the knee joint using the appropriate adapter insert. Place the alignment reference
point (= knee axis) 10 mm posterior to the alignment reference line. Take into account the
knee-ground distance and outward rotation of the knee (the adapter insert in the alignment
tool provides for a rotation of approx. 5°). Recommended sagittal positioning of the alignment
reference point: 20 mm above the medial tibial plateau.
4 Connect the prosthetic foot to the modular knee joint using the enclosed 2R77 Tube Adapter
(see Fig. 1, item 1).
18
Pyramid adapter
Tube clamp, 34 mm Ø
130°
755 g
82 mm
74 mm
125 kg
1, 2