Maintenance Instructions - Otto Bock 3R90 Instructions For Use Manual

Before changing the factory settings, be sure to pay attention to the following instructions:
During trial walking, first adjust the flexion resistance:
Increase the flexion resistance, as required, by turning the left valve screw (F) to the right (Fig. 6).
Afterwards, set the extension resistance by turning the right valve screw (E) to the right.
Carefully fine-tune flexion and extension.
Status
Excessive heel rise
Insufficient heel rise
Extension impact too hard
Insufficient extension
movement
Attention!
The resistance for extension may only be adjusted to the point that the complete exten-
sion of the leg is still always possible.
3.3 Cosmetic foam cover
Use the 3S107 Foam Cover for the 3R90 / 3R92 Joints.
Attention!
To eliminate noise in the cosmetic foam cover, do not use talcum powder! Talcum powder
reduces the lubrication of the mechanical parts, which may lead to a malfunction and
thus increase the risk of failure. Using this medical product after application of talcum
powder will render all claims against Otto Bock HealthCare null and void.
Note
An alternative for eliminating noises is a silicone spray (519L5) that can be sprayed
directly on the friction surface of the cosmetic foam cover.
3.4

Maintenance instructions

Ottobock recommends the readjustment of the knee joint's settings after the patient has spent a
period of time getting used to the prosthesis. This period of time varies depending on individual
patient characteristics.
Please check the wear and functionality of the knee joint at least once a year and make readjust-
ments if need be. Pay special attention to the resistance to movement and to the development of
unusual noise. Complete flexion and extension must be ensured.
Do not disassemble the joint. If there are potential malfunctions, please send the entire joint to
Ottobock Service.
Attention – Please inform your patient!
Due to different environmental conditions and conditions of application, the function
of the knee joint can be impaired. To avoid the risk of accident and possible injury to
the patient, the knee joint must no longer be used after a noticeable change of func-
tion has occurred. This noticeable change of function can be for example stiffness,
non-attainment of the extension stop, decreasing swing phase control or stance phase
stability, abnormal noises, etc.
14 | Ottobock
Measure
Increase resistance
Decrease resistance
Increase resistance
Decrease resistance
Procedure
Turn the left screw (F)to the right.
Turn the left screw (F)to the left.
Turn the right screw (E) to the right.
Turn the right screw (E) to the left.
3R90, 3R92