Technical Data - Ottobock 3R55 Gebrauchsanweisung

Attention!
Please avoid exposing prosthetic components to corrosive elements such as fresh
water, salt water, acids and other liquids. Using this medical product in such environ-
mental conditions will render all claims against Otto Bock HealthCare null and void.
Please inform your patients.
2.3 Function
Upper Joint Section (2) with adjustment pyramid and Lower Joint Section (1) of the four-axes
joint are connected by Posterior (3 + 4) and Anterior (5) Linkage Bars. Due to its polycentricity
the joint provides a rotational and translational movement. The centre of rotation (instantaneous
centre of rotation) changes its position dependent on the degree of flexion. In the extended posi-
tion the centre of rotation is placed at the height of the femoral condyles. It moves downward and
forward with increased flexion.
The small integrated Hydraulic Swing Phase Control (15) provides resistance to motion, thus
enabling the lower leg to move harmonically and naturally. Other than mechanical gait controls,
the hydraulic system automatically accommodates to the different walking speeds. The amount
of resistance to motion (damping resistance) can be regulated by adjusting the size of the orifices
through which the fluid flows. The movements of flexion and extension may be separately adjusted
(refer to section 5).
2.4 Service life
Attention!
Reuse on another patient.
Risk of injury due to loss of functionality as well as damage to the product.
Only use the product for a single patient.
As a basic principle, all Ottobock knee joints are subjected to tests involving three million load
cycles. Depending on the amputee's activity this corresponds to a service life of three to five years.

3 Technical data

Article number
Proximal connection
Distal connection
Knee flexion angle
Weight
System height
Proximal system height up to alignment reference
point
Distal system height up to alignment reference point
Max. user weight
Mobility Grade
3R55
3R55
Adjustment pyramid
Adjustment pyramid
110°
720 g
90 mm
9 mm
81 mm
125 kg / 275 lbs
3 + 4
Ottobock | 11